Ch8 Flashcards
(165 cards)
1
Q
A backbone network is a high-speed network that connects many networks.
A
T
2
Q
Backbone networks typically use lower speed circuits to interconnect a series of
LANs and provide connections to other backbone networks.
A
F
3
Q
A backbone network that connects many backbone networks spanning several
buildings at a single location is often called an Internet backbone.
A
F. Campus backbone or Enterprise backbone
4
Q
The distribution layer of a backbone connects LANs together.
A
T
5
Q
One basic component of a backbone network is the hardware device that connects
other networks to the backbone
A
T. and network cable
6
Q
Which cable type is often used in backbone networks to provide higher data rates?
a) Coaxial cable
b) Twisted-pair cable
c) Fiber optic cable
d) Ethernet cable
A
C.
7
Q
What are the basic components of a backbone network?
a) Network cables and access points
b) Routers and switches
c) Servers and computers
d) Network cables and hardware devices
A
D
8
Q
Which hardware devices are used in backbone networks to transfer messages between different networks?
a) Computers only
b) Routers and VLAN switches
c) Switches and access points
d) Modems and gateways
A
B
9
Q
At which layer of the OSI model do switches operate?
a) Transport layer
b) Data link layer
c) Network layer
d) Physical layer
A
B
10
Q
What function do routers perform in a network?
a) They connect two different TCP/IP subnets
b) They operate at the physical layer of the OSI model
c) They learn addresses by reading source and destination addresses
d) They forward packets between network segments
A
A
11
Q
Which layer of networks contains LANs that directly connect user devices like desktop PCs?
a) Core layer
b) Distribution layer
c) Access layer
d) Backbone layer
A
C
12
Q
What is the function of the distribution layer in network architecture?
a) To connect different buildings on an enterprise campus
b) To connect access LANs within a building
c) To connect user devices directly
d) To manage network security
A
B
13
Q
In which layer of networks are backbone networks found that connect different buildings on an enterprise campus?
a) Access layer
b) Distribution layer
c) Core layer
d) Peripheral layer
A
C
14
Q
What is the commonality between backbone networks in the distribution and core layers?
a) They both connect user devices directly
b) They both operate by the backbone networks
c) They both manage network security
d) They both serve to interconnect networks
A
B
15
Q
How does the function of the network cable in backbone networks compare to its function in LANs?
a) It serves the same purpose in both backbone networks and LANs
b) It operates at a different layer of the OSI model in backbone networks
c) It is used for different types of devices in backbone networks
d) It has a higher data transmission capacity in backbone networks
A
A
16
Q
The backbone architecture layer that is closest to the users is the
a. Access layer
b. Distribution layer
c. Core layer
d. Privacy layer
e. Switched layer
A
A
17
Q
Switches and routers are devices that can connect networks to the BN.
A
T
18
Q
The cable to connect BNs is usually twisted pair.
A
F
19
Q
A hardware device that operates at the application layer is a router.
A
F. at the network layer
20
Q
What is a characteristic of Layer-2 switches?
a) They modify messages as they pass through
b) They operate at the network layer
c) They are transparent devices
d) They primarily use IP addresses for forwarding packets
A
C
21
Q
What role do Layer-2 switches play in message forwarding?
a) They analyze message content
b) They encrypt message data
c) They only read and forward messages
d) They prioritize message transmission based on content
A
C. They do not change messages. “ Transparent device”
22
Q
Which addressing scheme do Layer-2 switches use to forward packets?
a) IP addresses
b) DNS addresses
c) MAC addresses
d) URL addresses
A
C
23
Q
How do routers differ from Layer-2 switches in terms of message handling?
a) Routers forward all messages indiscriminately
b) Routers only forward messages that need to go to other networks
c) Routers do not process Layer-3 messages
d) Routers form new Layer-2 messages for outgoing packets
A
B
24
Q
What distinguishes routers from switches in terms of message processing?
a) Routers perform less processing than switches
b) Routers do not process Layer-3 messages
c) Routers form new Layer-2 messages for outgoing packets
d) Routers process Layer-3 messages and perform more processing overall
A
D
25
What are VLAN switches primarily used for?
a) Connecting different buildings on an enterprise campus
b) Combining the features of Layer-2 switches and routers
c) Managing network security
d) Providing wireless access points
B
26
A switched backbone uses a bus topology
F. Star topology
27
. A __________ type of BN has a star topology with a switch at its center resulting in
all devices on the BN segment being part of the same IP network.
a. Bridged backbone
b. Virtual LAN
c. Hubbed backbone
d. Switched backbone
e. Routed backbone
D
28
Switched backbone networks:
a. always use a ring topology
b. are the least common type of BN used in one building
c. use a star topology with one device, usually a switch
d. switch the traffic based on layer 3 addresses
e. require much more management that do routed backbone networks
C
29
What is the most common type of backbone used mainly in the distribution layer?
A) Ring backbone
B) Switched backbone
C) Mesh backbone
D) Bus backbone
B
30
How are connections to the switch typically configured in a switched backbone?
A) Each connection is shared among multiple LANs.
B) Each connection is a separate point-to-point circuit.
C) Each connection is established using a mesh topology.
D) Each connection is established using a bus topology.
B
31
What is the result of having a star topology in a switched backbone?
A) Each LAN is connected to every other LAN.
B) Each LAN has its own dedicated circuit to the central switch.
C) Each LAN is connected in a circular arrangement.
D) Each LAN is connected to a common backbone cable.
B
32
In a switched backbone with a star topology, what is the implication for the devices on the backbone segment?
A) They are part of different IP networks.
B) They are not interconnected with each other.
C) They are all part of the same IP network.
D) They are connected using a mesh topology.
C
33
A room that contains a rack of equipment for a rack-based collapsed backbone is also
called the main distribution facility (MDF) or central distribution facility (CDF).
T
34
Switched backbones place all network devices for one part of the building physically
in the same room, often in a rack of equipment
T
35
. Which of the following is true regarding switched backbones?
a. They place all network devices for one part of the building physically in the same
room, often in a rack of equipment.
b. They have an advantage of requiring less cable.
c. They make it more difficult to move computers from one LAN to another.
d. Network capacity is always tied to the physical location of the computers.
e. They are harder to maintain and upgrade than a BN that is not rack-based.
A
36
With a switched backbone network, the equipment is usually placed in a ______.
a. server
b. NIC
c. cabinet
d. basement
e. rack
E
37
Devices in a rack are connected together using ___________.
a. patch cables
b. string
c. servers
d. modules
e. chassis switches
a
38
Devices in a rack are connected together using ___________.
a. patch cables
b. string
c. servers
d. modules
e. chassis switches
A
39
What is a benefit of using rack-mounted switched backbones?
A) Reduced network flexibility
B) Easier movement of computers among LANs
C) Increased likelihood of bottlenecks
D) Difficulty in offloading busy switches
B
40
When might rack-mounted switched backbones be particularly useful?
A) When there is no need to redistribute network traffic
B) When switches experience low traffic volume
C) When a busy switch requires offloading
D) When network cables converge into multiple locations
B
41
What potential issue can arise from concentrating high-traffic computers on a single switch?
A) Decreased network performance
B) Increased network flexibility
C) Enhanced network scalability
D) Improved switch efficiency
A
42
What does an MDF (Main Distribution Frame) setup allow in terms of network management?
A) It restricts cable convergence to multiple locations.
B) It prevents the redirection of cables from high-demand computers.
C) It allows all cables to converge into one location for efficient management.
D) It limits network traffic distribution to less busy switches.
C
43
How does the decoupling of network capacity from physical computer location affect network flexibility?
A) It restricts network flexibility by tying capacity to physical location.
B) It enhances network flexibility by allowing computers to connect to different network segments.
C) It reduces network flexibility by concentrating network traffic.
D) It has no effect on network flexibility
B
44
With switched backbones, network capacity is always tied to the physical location of
the computers.
F
45
How does the decoupling of network capacity from physical computer location affect network flexibility?
A) It restricts network flexibility by tying capacity to physical location.
B) It enhances network flexibility by allowing computers to connect to different network segments.
C) It reduces network flexibility by concentrating network traffic.
D) It has no effect on network flexibility
B
46
What is a characteristic of a chassis switch?
A) It only supports rack-mounted installations.
B) It allows users to plug modules directly into the switch.
C) It is limited to a fixed number of ports.
D) It requires separate switches for each network device.
B
47
What role do modules play in a chassis switch?
A) They regulate power distribution within the switch.
B) They determine the physical size of the switch.
C) Each module represents a specific type of network device.
D) They serve as the primary interface for users to interact with the switch.
C. One module might be a 16-port
100Base-T switch, another might be a router, whereas another might be a 4-port 1000Base-F switch, and
so on.
48
What determines the number and type of modules a chassis switch can hold?
A) The physical size of the switch
B) The availability of power sources
C) The internal capacity and design of the switch
D) The type of network devices connected to the switch
C
49
How does the flexibility of chassis switches benefit network expansion?
A) By reducing the number of available ports
B) By limiting the switch to specific technologies
C) By making it difficult to add new modules
D) By allowing easy addition of new modules with additional ports
D
50
What makes it simple to upgrade a chassis switch to use new technologies?
A) By reducing the number of modules
B) By increasing the complexity of the switch
C) By laying new cables and inserting appropriate modules into the chassis switch
D) By limiting the switch to existing technologies
C
51
A key advantage of a chassis switch is its flexibility
T
52
Where are routed backbones commonly used within enterprise campus networks?
A) At the access layer
B) At the distribution layer
C) At the core layer
D) At the aggregation layer
C
53
What is the primary function of routers in a routed backbone?
A) To connect LANs to switches
B) To break the network into separate subnets
C) To manage broadcast messages
D) To increase network speeds
B
54
How do routers handle message traffic in a routed backbone?
A) By transmitting packets at the data link layer (Layer 2)
B) By transmitting packets at the network layer (Layer 3)
C) By transmitting packets at the transport layer (Layer 4)
D) By transmitting packets at the physical layer (Layer 1)
B
55
What advantage does a routed backbone offer in terms of network efficiency?
A) It allows for faster network speeds compared to switching.
B) It limits broadcast messages to within one subnet.
C) It provides centralized management of subnet addresses.
D) It enables seamless communication between different buildings.
B
56
What is a disadvantage of using routers in a routed backbone compared to switches?
A) Routers require less management.
B) Routers are less costly than switches.
C) Routers result in slower speeds due to routing.
D) Routers have a lower impact on network efficiency.
C. compare to switch
57
Routers can only connect the same type of cable
F
58
. Routers connect two or more network segments that use the same or different data
link protocols, but the same network protocol.
T
59
One difference between a switch and a router is that a router will only process
messages addressed to the router (at layer 2), while a switch processes all messages.
T
60
6. The primary advantage of a routed backbone is that it clearly segments each part of
the network connected to the backbone because each segment has its own subnet
addresses that can be managed separately
T
61
One advantage of a routed backbone is that is requires little management.
F. require more management hand higher cost for routers than switches
62
Backbone networks are rarely used anymore.
F
63
Switched backbones are harder to maintain and upgrade than a BN that is not rackbased.
F
64
Routers:
a. operate at the application layer.
b. operate only at the physical layer.
c. cannot connect two or more networks that use the same type of cable.
d. may also be called TCP/IP gateways.
e. operate only at the data link layer.
D
65
Which of the following is not a way that a router differs from a switch?
a. Routers can connect two or more networks that use the same data link protocol.
b. Routers only process messages that are specifically addressed to it.
c. Routers operate at the network layer.
d. Routers perform more processing on each message than switches do.
e. Routers can choose the “best” route between networks for forwarding a packet
A
66
What ensures that broadcast messages stay within their respective subnets in a routed backbone?
A) Core routers
B) Distribution layer switches
C) Access layer routers
D) Routers
D
67
In a routed backbone, what feature allows each segment to have its own subnet addresses managed by different network managers?
A) LAN segmentation
B) Core routers
C) Distribution layer switches
D) Managed switches
A
68
A routed backbone tends to be used more for large networks than VLANs, although
VLAN high-speed switches and this new type of LAN-BN architecture are now being
considered.
T
69
A VLAN network assigns computers to LAN segments by hardware
F. by software
70
A VLAN requires the computer manager to reconfigure the physical cables to the
switch if a computer is moved from one port to another port on a switch.
F. allowing for easier reconfiguration without physically moving cables
71
VLANs provide faster performance compared to switched or routed
backbone architectures
T
72
What enables the creation of Virtual LANs (VLANs) in network architecture?
A) Low-speed switches
B) Hardware-based assignment
C) High-speed intelligent switches
D) Physical cable reconfiguration
C
73
How do VLANs typically compare to traditional LANs and routed backbones in terms of traffic management?
A) VLANs have slower traffic management capabilities.
B) VLANs have faster traffic management capabilities.
C) VLANs have similar traffic management capabilities.
D) VLANs have no traffic management capabilities.
B
74
In which type of network are VLANs typically used?
A) Small-scale networks
B) Medium-scale networks
C) Larger networks
D) Home networks
C
75
What are the two basic implementations of VLANs mentioned in the text?
A) Single-switch VLANs and multi-switch VLANs
B) Single-router VLANs and multi-router VLANs
C) Single-segment VLANs and multi-segment VLANs
D) Single-node VLANs and multi-node VLANs
A
76
The biggest drawbacks to VLANs are their_________________.
a. cost and management complexity
b. size and contention
c. contention and cost
d. learning curve and contention
e. speed and size
A
77
Computers can be assigned to a VLAN based on the ________.
a. IEEE 802.1q standard
b. NIC interface
c. physical port on the switch
d. IEEE 802.3 standard
e. physical location of the computer
C
78
How do VLAN segments function in comparison to physical LAN segments or subnets?
A) They operate independently of each other.
B) They share the same physical infrastructure.
C) They are interconnected via routers.
D) They act as though they are connected to the same physical switch or hub in a certain subnet.
D
79
How do VLAN switches behave in terms of creating multiple subnets?
A) They act as bridges.
B) They act as routers.
C) They act independently of subnets.
D) They create subnets inside the switch.
D
80
What distinguishes the behavior of VLAN switches from traditional routers?
A) VLAN switches cannot create multiple subnets.
B) VLAN switches create subnets between switches.
C) VLAN switches create subnets inside the switch.
D) VLAN switches do not support broadcast messages.
C
81
How are broadcast messages handled within VLAN segments according to the text?
A) They are forwarded to computers on different VLANs.
B) They are blocked by VLAN switches.
C) They are sent only to computers on the same VLAN.
D) They are sent to all computers on the network.
C
82
What analogy does the text draw between VLAN switches and routers?
A) VLAN switches behave like hubs.
B) VLAN switches behave like bridges.
C) VLAN switches behave like routers, except the subnets are inside the switch, not between switches.
D) VLAN switches behave like firewalls.
C
83
Switches have become less popular than hubs.
F
84
Switches are software devices
F
85
Switches:
a. learn addresses by reading the source and destination addresses.
b. operate at the physical layer only.
c. connect two or more network segments that use different data link protocols.
d. connect two or more network segments that use different network protocols.
e. have become less popular than hubs.
A
86
What characterizes the connectivity within VLANs designed to act like hubs?
A) All computers can transmit simultaneously.
B) Several computers share a given capacity and must take turns using it.
C) Each computer has a dedicated connection.
D) Only one computer is allowed in the VLAN.
B
87
Why are switched circuits preferred over shared circuits in Virtual LANs?
A) Shared circuits allow for simultaneous transmission.
B) Switched circuits are less expensive.
C) Shared circuits are more reliable.
D) Switched circuits offer better performance.
D
88
What scenario is possible in Virtual LANs regarding the number of computers in a VLAN?
A) Only one computer can be in a VLAN.
B) Multiple computers must be in a VLAN.
C) There can be just one computer or multiple computers in a VLAN.
D) There can be no computers in a VLAN.
A
89
What is the purpose of having just one computer in a given VLAN?
A) To maximize network capacity
B) To minimize network management
C) To provide a dedicated connection
D) To reduce network expenses
C
90
When is it common to have only one computer in a given VLAN?
A) For end-user devices
B) For printers and peripherals
C) For servers
D) For network switches and router
C
91
What differentiates VLAN switches that support full switched circuits from those supporting shared circuits, according to the statement?
A) The number of computers they can connect
B) The network speed they offer
C) The cost of the switches
D) The reliability of the switches
C
92
What capability does VLANs offer in terms of geographic locations?
A) It allows computers in different locations to share physical resources.
B) It enables computers in different locations to communicate with each other directly.
C) It permits computers in different geographic locations to be placed in the same subnet.
D) It segregates computers based on their physical proximity to each other.
C
93
What is a multiswitch VLAN, as described in the text?
A) A VLAN that spans multiple geographic locations
B) A VLAN that utilizes multiple switches to build VLANs
C) A VLAN that connects directly to the core backbone
D) A VLAN that operates only within a single building
B
94
Where are VLANs commonly found within network architecture?
A) In the core backbone
B) In the access and distribution layers
C) Exclusively in core backbones between buildings
D) In individual computers
B. but lately span in the core backbone
95
How does the implementation of VLANs impact subnet creation?
A) It limits subnet creation based on geographic locations.
B) It enables subnet creation based on user groups rather than physical locations.
C) It restricts subnet creation to specific departments within a building.
D) It eliminates the need for subnets.
B
96
Where does VLAN implementation typically extend to between buildings?
A) Core backbone
B) Distribution layer
C) Access layer
D) Aggregation layer
A
97
How is security and network capacity managed with VLANs spanning different buildings?
A) By physical location of computers
B) By user identities
C) By switch configurations
D) By subnet designations
B
98
What is one major advantage of Virtual LANs (VLANs) compared to other network architectures?
A) Simplified network topology
B) Precise management of traffic flow
C) Lower cost of implementation
D) Greater scalability
B
99
What potential impact does broadcast traffic have on network performance?
A) It enhances network speed
B) It reduces network congestion
C) It has the potential to reduce performance
D) It improves resource allocation
C
100
What is often the result of VLAN implementation in terms of network performance?
A) Slower performance compared to other backbone architectures
B) Equivalent performance to other backbone architectures
C) Faster performance compared to other backbone architectures
D) Unpredictable performance fluctuations
c
101
What can VLANs allocate resources to, according to the advantages provided?
A) Only to broadcast traffic
B) Only to specific users
C) Only to high-priority traffic
D) To different types of traffic
D
102
What is a key reason for VLANs offering faster performance compared to other backbone architectures?
A) Their ability to increase broadcast traffic
B) Their ability to complicate traffic management
C) Their efficient traffic management capabilities
D) Their tendency to reduce resource allocation
C
103
How do VLANs prioritize traffic?
A) By increasing network congestion
B) By using VLAN tag information in Ethernet packets
C) By decreasing network capacity
D) By eliminating Quality of Service (QoS) mechanisms
B
104
Using ______ capabilities, network managers can connect VOIP phones directly into
a VLAN switch and configure the switch to reserve sufficient network capacity so
that they will always be able to send and receive voice messages.
a. backbone
b. switched
c. routed
d. QoS
e. access
D
105
VLANs prioritize traffic based on the ______.
a. IEEE 802.1q standard
b. IEEE 802.11 standard
c. VLAN size
d. multiswitch allocation
e. switch dynamics
A
106
How does prioritization based on IEEE 802.1q standard complement Quality of Service (QoS) mechanisms at higher layers?
A) By restricting the flow of traffic
B) By utilizing different classes of service
C) By eliminating the need for RSVP
D) By decreasing network performance
B
106
Which of the following is not true about multi-switch VLANs?
a. Several switches are used to build a VLAN.
b. The switches in the VLAN can send packets among themselves in a way that
identifies the VLAN to which the frame belongs.
c. In some multi-switch VLANs, the Ethernet frame is modified based on the
emerging IEEE 802.1q standard.
d. In some multi-switch VLANs, a new VLAN packet encapsulates the Ethernet
packet.
e. VLAN configurations are limited to spanning over no more than two switches
E
106
What information does the VLAN tag specify in Ethernet packets?
A) The source IP address
B) The destination MAC address
C) The VLAN to which the packet belongs and assigns a priority code
D) The protocol used for transmission
C
107
When is RSVP most effective in prioritizing traffic?
A) When combined with VLAN tag information
B) When used with QoS capabilities
C) When applied solely at the network layer
D) When disregarding QoS capabilities
B. ko phai A vi ethernet packet co vlan tag ben tong
107
What does extending QoS capabilities to the data link layer with VLANs enable?
A) The configuration of VLAN switches to reserve insufficient network capacity
B) The elimination of VOIP telephones from the network
C) The reservation of sufficient network capacity for applications like VOIP telephones
D) The transmission and reception of voice messages without any issues
C
107
How can VLAN switches be configured to ensure consistent transmission and reception of voice messages?
A) By reducing network capacity for other applications
B) By disabling QoS capabilities
C) By reserving enough network capacity for voice traffic
D) By prioritizing other types of traffic
C
108
What is an example of utilizing VLANs to ensure consistent transmission and reception of voice messages?
A) Plugging VoiP phones directly into a VLAN switch and configuring the switch to reserve enough network capacity for voice traffic
B) Configuring switches to reserve insufficient network capacity
C) Configuring switches to reserve enough network capacity for voice traffic
D) Using VLAN switches without any configurations
A
109
What are the primary drawbacks of VLANs?
A) High cost and management simplicity
B) Low cost and management complexity
C) High cost and management complexity
D) Low cost and management simplicity
C
110
What is mentioned as a characteristic of VLAN switches in terms of technology maturity?
A) They are well-established technologies
B) They are older technologies
C) They are newer technologies
D) They are standardized technologies
C
111
How do VLANs differ from traditional Ethernet/IP setups?
a) VLANs use MAC addresses instead of IP addresses
b) VLANs assign computers to specific VLANs with a VLAN ID number
c) VLANs do not support DHCP
d) VLANs cannot support multiple IP subnets simultaneously
B
111
What does each VLAN ID correspond to?
a) MAC address
b) IP address
c) IP Subnet mask
d) VLAN switch
C
111
How are IP addresses assigned to computers connected to a VLAN switch?
a) Computers manually configure their IP addresses
b) Computers receive IP addresses from the VLAN switch acting as a DHCP server
c) IP addresses are assigned based on MAC addresses
d) IP addresses are not assigned in VLAN setups
B
111
How many separate VLANs can most VLAN switches support simultaneously?
a) 128
b) 255
c) 512
d) 1024
B
111
How are computers assigned to VLANs ( and its matching IP subnets)?
a) By their MAC addresses
b) By their IP addresses
c) By the VLAN ID they choose
d) By the physical port on the switch they are connected to
D
111
How does the network manager ensure easy movement of computers between VLANs?
a) By assigning MAC addresses
b) By configuring IP addresses
c) By assigning computers to VLANs using physical port numbers
d) By utilizing TCP port numbers
C
111
What assists the network manager in assigning computers to specific VLANs?
a) DHCP server
b) VLAN switch
c) Software
d) IP subnetting
C
111
Which factor simplifies the process of moving a computer from one VLAN to another?
a) MAC addresses
b) VLAN switch configuration
c) Physical port numbers
d) IP addressing scheme
C
112
113
How are computers assigned to VLANs?
a) By their MAC addresses
b) By their IP addresses
c) By a VLAN ID number
d) By their subnet masks
C
114
What happens to computers connected to a VLAN switch?
a) They receive MAC addresses from the switch
b) They are assigned IP addresses corresponding to the VLAN ID
c) They are disconnected from the network
d) They automatically configure their own IP addresses
B
115
What role do IP addresses play in the transmission of Ethernet frames?
a) They specify the route the frame will take
b) They determine the source of the frame
c) They specify the final destination of the frame
d) They dictate the size of the Ethernet frame
C
116
What is the primary function of Ethernet addresses in frame transmission?
a) To specify the route the frame will take
b) To move the message from one computer to the next along the route.
c) To encapsulate the frame for transmission
d) To determine the size of the Ethernet frame
B
117
How do L2 switches handle Ethernet frames?
a) They modify the frames before passing them along
b) They route the frames based on IP addresses
c) They are transparent and pass frames through unchanged
d) They assign new Ethernet addresses to the frames
C
118
What is the role of routers in handling Ethernet frames?
a) They preserve the original Ethernet header
b) They remove the old Ethernet header and create a new one
c) They modify the IP addresses within the frame
d) They filter out unnecessary frame
B
119
In what way do VLAN switches differ from L2 switches?
a) They route frames based on IP addresses
b) They assign new Ethernet addresses to frames
c) They are transparent but may change Ethernet frames at times
d) They modify the IP addresses within frames
C
120
What is the primary function of VLAN trunks?
a) To connect computers within the same VLAN
b) To enable traffic flow between two VLAN switches
c) To assign IP addresses to VLANs
d) To filter out unwanted network traffic
B
121
What happens when a computer issues a broadcast message on a VLAN switch?
a) The switch identifies the MAC address of the sending computer
b) The switch identifies the IP address of the sending computer
c) The switch identifies the VLAN ID of the sending computer
d) The switch blocks the broadcast message
B. which its attached to computer
122
What happens when a computer sends a broadcast message on a VLAN?
a) The switch identifies the IP address of the sender
b) The switch identifies the MAC address of the sender
c) The switch identifies the VLAN ID of the sender
d) The switch blocks the broadcast message
C
123
How does the switch determine which computers to forward the broadcast message to?
a) By checking the IP addresses of all computers on the network
b) By sending the message to all computers on the same switch
c) By sending the message to computers with different VLAN IDs
d) By sending the message to computers with the same VLAN ID as the sender
D
124
What is the initial state of the forwarding table when a VLAN switch is turned on?
a) Complete
b) Partial
c) Empty
d) Undefined
C
125
How does a VLAN switch handle an Ethernet frame with a destination address not found in its forwarding table?
a) Broadcasts it to all ports
b) Drops the frame
c) Sends it as a broadcast to all computers within the same subnet
d) Forwards it to the router
C
126
Which tables are complete when a VLAN switch is turned on, according to the information provided?
a) Forwarding table
b) VLAN ID and trunk tables
c) Routing table
d) MAC address table
B
127
When does a VLAN switch treat a frame as a broadcast frame?
a) When it finds the destination Ethernet address in the forwarding table
b) When it cannot find the destination Ethernet address in the forwarding table
c) When it receives a specific command from the network administrator
d) When the frame contains a specific VLAN ID
B
128
How does a VLAN help limit broadcast traffic flow?
a) By increasing the number of broadcast messages
b) By forwarding broadcast messages to all computers in the network
c) By dividing the network into separate subnets
d) By allowing all computers to be in the same subnet
C
129
Which of the following would not be part of an “ideal” backbone design?
a. Access layer composed of 10/100 layer 2 Ethernet switches
b. Distribution layer composed of layer 3 Ethernet switches of 100 (or 1000) Base-T
c. Redundant switches
d. Core layer composed of layer 3 Ethernet switches running 10 (or 40) GbE over
fiber
e. Coax cabling throughout LANs and BN
E
130
What backbone technology is recommended as best practice?
a) Token Ring
b) Ethernet, such as gigabit Ethernet
c) FDDI
d) ATM
b
131
What is a common architectural innovation suggested for backbone technology?
a) SONET
b) VLANs
c) MPLS
d) Frame Relay
B
132
What backbone architecture is recommended for the distribution layer?
a) Routed backbone
b) MPLS backbone
c) Switched backbone
d) ATM backbone
C
133
What technology is suggested for the core layer of most organizations?
a) Routed backbone
b) Switched backbone
c) Token Ring
d) Frame Relay
A
134
What is a reason for adopting VLANs in large organizations?
a) Decreased cost
b) Reduced complexity
c) Improved security
d) Spanning single buildings only
D
135
What is recommended as the optimal architecture for the distribution layer?
a) Routed backbone
b) VLAN
c) Switched backbone or VLAN
d) Token Ring
C
136
What is suggested for the access layer in terms of switches?
a) 10Base-T
b) Token Ring
c) 1000Base-T L2 Ethernet switches
d) ATM switches
C
137
What is recommended for connecting the distribution layer to the access layer?
a) Fiber only
b) Cat 6 only
c) Cat 5e or Cat 6
d) Wireless
C
138
What redundancy measure is recommended for reliability?
a) Single switches
b) Redundant switches
c) No redundancy needed
d) Routers
B. in distribution layer
139
Most backbone devices are store-and-forward devices. One simple way to improve
performance is to ensure that they have ________________.
a. enough ports
b. sufficient memory
c. twisted pair connections
d. large wheels
e. IEEE 802.11
B
140
What is suggested to improve device performance if devices are identified as the bottleneck?
a) Downgrade to slower devices
b) Implement more complex routing protocols
c) Upgrade to faster devices or routing protocols
d) Remove routing protocols entirely
C
141
What is a characteristic of Distance Vector Routing?
a) It is slower than dynamic routing
b) It can handle high-traffic scenarios well
c) It is typically used in WANs with many possible routes
d) It counts the number of hops to determine the best route
D
142
What is a potential drawback of Distance Vector Routing?
a) It simplifies processing
b) It can improve performance in networks with fewer routes
c) It may impact circuit performance during high-traffic scenarios
d) It requires frequent status reports, increasing network traffic
C
143
When is Link State Routing typically used?
a) In LANs with few possible routes
b) In LANs with many possible routes
c) In WANs with many possible routes
d) In WANs with one possible route
C
144
Circuit capacity on a backbone network will not be improved by:
a. going from 100Base-T Ethernet to 10Base-T Ethernet.
b. going from 100Base-T Ethernet to gigabit Ethernet.
c. adding additional circuits alongside heavily used ones.
d. replacing a shared circuit backbone with a switched circuit backbone.
e. providing a faster circuit to the server.
A
145
What is the focus when addressing circuit bottlenecks?
a) Routers
b) Switches
c) Servers
d) Printers
C
146
What is the proposed solution for addressing circuit bottlenecks to critical components like servers?
a) Downgrading the network speed
b) Implementing a flat network structure
c) Upgrading to higher-speed connections for servers
d) Removing additional circuits
C
147
What is the recommended network speed for critical components like servers in the proposed solution?
a) 100Base-T
b) 10Base-T
c) 1000Base-T
d) 100 Mbps
C
148
What type of network connection speed is recommended for client computers in the proposed solution?
a) 1000Base-T
b) 100 Mbps
c) 10Base-T
d) 10 Gbps
B
149
What is the purpose of adding additional circuits in network infrastructure?
a) To decrease redundancy
b) To increase network complexity
c) To create bottlenecks
d) To create redundancy and distribute load
D. to supplement the heavily used circuit
150
Which of the following would be least effective in improving backbone performance?
a. upgrading memory for devices in the network
b. changing the demand placed on the network
c. adding new keyboards to the client computers
d. upgrading the circuits between devices
e. improving devices in the network
C
151
Network demand will not be reduced by:
a. restricting (or moving) applications such as desktop videoconferencing.
b. using network devices to ensure that broadcast messages do not go to other
networks.
c. encouraging the use of applications such as medical imaging.
d. sending status information to all computers on all LANs in the backbone network.
e. restricting (or moving) applications such as multimedia.
C
152
Which of the following would not be part of an “ideal” backbone design?
a. Access layer composed of 10/100 layer 2 Ethernet switches
b. Distribution layer composed of layer 3 Ethernet switches of 100 (or 1000) Base-T
c. Redundant switches
d. Core layer composed of layer 3 Ethernet switches running 10 (or 40) GbE over
fiber
e. Coax cabling throughout LANs and BN
E
153
Device performance on a backbone network will not be improved by:
a. using the same protocols in the backbone and the LANs.
b. using static routing in low to moderate traffic conditions.
c. ensuring that backbone devices have sufficient memory so that packets do not
have to be retransmitted by the sender.
d. translating packets from one protocol to another as they enter the BN.
e. none of the options.
D
154
