Switches and Routers Flashcards
(141 cards)
1
Q
A network switch is the central connection point for ____ plugging into the network.
A
devices
2
Q
Which device is used to repeat and generate network signals?
A
hub
3
Q
What does every network card have burned into it?
A
MAC address
4
Q
What does ASIC stand for?
A
Application Specific Integrated Circuit
5
Q
Cisco ______ combines multiple switches into one for ease of management.
A
stackwise
6
Q
_______ is used to gain more ports across multiple switches.
A
daisy-chain
7
Q
What does CAM stand for?
A
content accessible memory
8
Q
What is a unicast address?
A
directed to one interface/device
9
Q
Which device connects dissimilar networks?
A
router
10
Q
What does IOS stand for?
A
internetwork operating system
11
Q
Are routers software or hardware based?
A
software
12
Q
Are ASICs software or hardware based?
A
hardware
13
Q
Lower frequencies have a _____ range than high frequencies.
A
higher
14
Q
What does WAP stand for?
A
wireless access point
15
Q
What frequencies does WAPs broadcast on?
A
2.4 Ghz and 5 Ghz
16
Q
How many channels exist on a 2.4 Ghz frequency?
A
11
17
Q
How many clean channels does a 2.4 Ghz frequency have?
A
3 (1, 6, 11)
18
Q
What is the purpose of a controller?
A
manage multiple WAP configurations
19
Q
Which frequency provides more channels? 2.4 Ghz or 5 Ghz?
A
5 Ghz
20
Q
True or False: A router can perform basic firewall functions.
A
True
21
Q
True or False: A firewall can perform routing functions.
A
True
22
Q
What is transparent mode on a firewall?
A
Firewall does not break up the network.
23
Q
What is routed mode on a firewall?
A
Firewall divides the network
24
Q
What is stateful filtering?
A
By default traffic is allowed to move from a higher security zone to a lower zone
25
On a scale of level 0 to level 100, which value has the highest level security?
100
26
True or False: A router allows by default and denies by exception.
True
27
True or False: A firewall allows by default and denies by exception.
False
28
True or False: A firewall denies everything by default and allows by exception.
True
29
What is an IPS?
intrusion prevention system
30
What are the two methods IPS detect intrusions?
anomaly based or signature based
31
Which areas of the network are bottleneck areas?
internet and WAN
32
What is the speed of a T1 line?
1.54 mbps
33
What is EtherChannel within Cisco?
grouping several Ethernet links to create one logical link
34
What is the benefit of EtherChannel within Cisco?
fault tolerance and high speed links
35
What does CSMA/CD stand for?
carrier sense multiple access / collision detection
36
True or False: WAPs possess CSMA/CD capabilities.
False
37
What do WAPs use in place of CSMA/CD?
CSMA/CA (collision avoidance)
38
A data transfer rate is measured at 100 Mbps. What does Mbps stand for?
Megabits per second
39
What is a MDF?
Main distribution facility?
40
What is an IDF?
Intermediate distribution facility
41
What is the purpose of a MDF?
central location where all cabling terminates
42
What is the effective distance of Ethernet?
100 meters
43
What is the difference between multimode and single mode fiber?
multimode transmits up to 500m
| single mode fiber is used for longer distances
44
What does CAT3, CAT4, CAT5, CAT6, etc. refer to?
cable twists, tighter twists
45
What are UTP cables?
unshielded twisted pair cables (ethernet)
46
What are straight-through cables used for?
unlike devices
e. g. router to switch
e. g. NIC to switch
47
What does pin 1 connect to on a straight-through cable?
pin 3
48
What does pin 2 connect to on a straight-through cable?
pin 6
49
What does Auto MDIX provide for cables?
recognizes cable pin-outs and auto configures
50
What are crossover cables used for?
like devices
e. g. router to router
e. g. switch to switch
51
What are serial cables used for?
WAN, long distance
52
What are the three topologies for networks?
star, mesh, hybrid
53
Which topologies are setup for redundancy?
mesh, hybrid
54
What is unicast?
one to one
55
What is multicast?
one to many
56
What is broadcast?
one to all
57
What is anycast?
one to closest, nearest
58
What stream mode does MOH (music on hold) use?
multicast
59
When imaging multiple devices, what stream mode is used (preferably)?
multicast
60
What does DHCP stand for?
dynamic host configuration protocol
61
What is the function of DHCP?
dynamically assign IP addresses
62
What does ARP stand for?
address resolution protocol
63
What is the function of ARP?
resolves IP addresses into MAC addresses
64
Which internet protocol uses anycast?
IPv6
65
When are broadcast messages used?
ARP, DHCP, RIP
| Used to gather or distribute information
66
How many hosts can you have with a Class C address?
254 hosts
67
What is used to translate a name into an IP address?
DNS
68
What is RFC1918?
private IPv4 address spaces
69
What is NAT?
network address translation
| translates private IP to public IP
70
If an address falls under 172.16.0.0 - 172.31.255.255, what class is it?
private IPv4
71
If an address falls under 192.168.0.0 - 192.168.255.255, what class is it?
private IPv4
72
If an address falls under 10.0.0.0 - 10.255.255.255, what class is it?
private IPv4
73
What is the default time on an ARP cache?
5 minutes
74
Within a packet, the destination MAC address is usually associated to which device?
router (default gateway)
75
True or False: IP addresses and MAC addresses are required to send packets.
True
76
A computer generates an HTTP request to CBTNuggets.com. When going through the encapsulation process, what is added closest to the originating HTTP GET message from the computer?
source and destination IP address
77
When a computer doesn't know the MAC address of its default gateway, what does it do to find out?
send ARP message
78
What does the router do when it receives a packet destined for another network?
replaces source and destination MAC address
79
Between TCP and UDP, which is a reliable connection?
TCP
80
What protocol does ping work over?
ICMP (internet control message protocol)
81
What are the steps of the TCP three-way handshake?
SYN, SYN/ACK, ACK
82
Which transmission protocol is associated with real-time transfers?
UDP
83
Which transmission protocol is session based?
TCP
84
What is TCP sliding window?
adjustment of data sent before it is acknowledged from sender and receiver
85
What does the command nslookup do?
verify DNS records
86
What are two useful reasons for using Telnet?
device management and to verify open ports
87
What is the access layer of the Cisco model?
where devices connect to switches
88
What is the distribution layer of the Cisco model?
redundancy for the access layer
89
What is the core layer of the Cisco model?
connect multiple distribution layers
90
Which layer in the three-tiered Cisco model provides connectivity to all access-layer switches?
distribution
91
What is the most common model in the Hierarchical Network Design?
access layer
92
What is the most common model in the Hierarchical Network Design?
collapsed core model
93
What is unique about the design of the collapsed core network model?
the distribution and core layer are implemented by a single device
94
What three layers refer to as the "computer layers" that are typically not inspected or modified by network devices?
session, presentation, application
95
What does the command netstat do?
display all active connections
96
What layer is the FCS/CRC added?
layer 2 (data link)
97
Which UDP port is used by DNS services?
53
98
Every IOS version is platform-specific. True or false?
True
99
To assist in controlling Cisco devices, the Internetwork Operating System (IOS) command line is _____ sensitive.
context
100
What are the three ways you can access the command line in IOS?
console port, telnet, SSH
101
What program can you use to create scripts for command line?
notepad
102
What application can you use to view what COM port is used?
device manager
103
The pinouts for the console cable are _______.
rolled
104
What are the default values for serial line?
9600 8N1 N
105
What does 9600 8N1 N refer to?
speed(baud), data bits, stop bits, parity(flow control)
106
Which symbol is an easy way to identify that you are in user mode?
>
107
What symbol identifies that you are in privilege mode?
#
108
What type of notification message is displayed when you do not have a configuration saved on your Cisco device?
syslog message
109
What command is used to enter console mode?
line console 0
110
What command is used to enter privilege mode?
enable
111
What command is used to enter global configuration mode?
configuration terminal
112
What command can be used to move from a high level to a lower level? (config to enable mode)
exit
113
What command can be used to move directly back to privilege mode?
end or ctrl+z
114
What command can be used to view interfaces?
show ip interface
| show ip interface brief
115
When you are under line console 0 or line vty 0 15, what does the logging synchronous command do?
It will move your config prompt to the next line when a system message is displayed
116
What does the command no ip domain-lookup do?
Prevents domain lookup for IOS input
117
What command can be used to view saved configurations?
show flash
118
What command can be used to view configurations stored on RAM?
show running-config
| show run
119
What command can be used to view configurations stored on NVRAM?
show startup-config
| show start
120
What command will save your current configuration to startup?
copy running-config startup-config
| copy run start
121
What command will erase the NVRAM or reset to factory settings?
write erase
122
How do you erase the running config?
reboot the device
123
What command can be used to save your current configuration to a tftp server?
copy running-config tftp
124
What command can be used to assign an ip address?
ip address (ip address) (subnet mask)
125
What command can be used to set ip address to dhcp?
ip address dhcp
126
What command can be used to encrypt passwords?
service password-encryption
127
What command can be used to hash passwords?
secret
128
When logging in with console or Telnet, what is the banner sequence?
MOTD, login, user login, exec
129
When logging in with SSH, what is the banner sequence?
login, user login, MOTD, exec
130
Under which file name is all VLAN information stored?
vlan.dat
131
If a device displays, "Would you like to enter the initial configuration dialog?" what can you assume about the device?
NVRAM is cleared
132
Where do you assign the IP address on a switch for telnet or SSH?
vlan1
133
What command will generate the RSA encryption keys needed for SSH and HTTPS device management?
crypto key generate rsa
134
If you change the domain name of a Cisco device after the RSA has been generated, the encryption will not be affected. True or false?
False
135
Which command will configure all SSH and Telnet ports at the same time?
line vty 0 4
136
Within a switch interface, if the status of an interface is down, this indicates that there may be an issue with what layer?
layer 1, physical
137
Within a switch interface, if the protocol of an interface is down, this indicates that there may be an issue with what layer?
layer 2, data link
138
For the switch interface FastEthernet 0/0/0, what does Fast Ethernet refer to?
Type
139
For the switch interface FastEthernet 0/0/0, what does 0/0/0 refer to?
blade/module/port
140
What type of cable allows you to stack switches together to act as one?
stackwise cable
141
What is the command to prevent your device from looking up mistyped privileged mode commands via DNS?
no ip domain-lookup
