Révision finale, ccna2 Flashcards
What are two features of a link-state routing protocol? (Choose two.)
- The database information for each router is obtained from the same source.
- Routers send triggered updates in response to a change.
- Routers create a topology of the network by using information from other routers.
- Paths are chosen based on the lowest number of hops to the designated router.
- Routers send periodic updates only to neighboring routers.
- Routers send triggered updates in response to a change.*
- Routers create a topology of the network by using information from other routers. *
Fill in the blank.
In IPv6, all routes are level ___ ultimate routes.
1
Which switching method drops frames that fail the FCS check?
ingress port buffering
cut-through switching
store-and-forward switching
borderless switching
store-and-forward switching *
Which summary IPv6 static route statement can be configured to summarize only the routes to networks 2001:db8:cafe::/58 through 2001:db8:cafe:c0::/58?
ipv6 route 2001:db8:cafe::/54 S0/0/0
ipv6 route 2001:db8:cafe::/60 S0/0/0
ipv6 route 2001:db8:cafe::/62 S0/0/0
ipv6 route 2001:db8:cafe::/56 S0/0/0
ipv6 route 2001:db8:cafe::/56 S0/0/0*
When a Cisco switch receives untagged frames on a 802.1Q trunk port, which VLAN ID is the traffic switched to by default?
data VLAN ID
native VLAN ID
unused VLAN ID
management VLAN ID
native VLAN ID *
A college marketing department has a networked storage device that uses the IP address 10.18.7.5, TCP port 443 for encryption, and UDP port 4365 for video streaming. The college already uses PAT on the router that connects to the Internet. The router interface has the public IP address of 209.165.200.225/30. The IP NAT pool currently uses the IP addresses ranging from 209.165.200.228-236. Which configuration would the network administrator add to allow this device to be accessed by the marketing personnel from home?
ip nat pool mktv 10.18.7.5 10.18.7.5
ip nat inside source static tcp 10.18.7.5 443 209.165.200.225 443
ip nat inside source static udp 10.18.7.5 4365 209.165.200.225 4365
ip nat inside source static tcp 209.165.200.225 443 10.18.7.5 443
ip nat inside source static udp 209.165.200.225 4365 10.18.7.5 4365
No additional configuration is necessary.
ip nat outside source static 10.18.7.5 209.165.200.225
ip nat inside source static tcp 10.18.7.5 443 209.165.200.225 443
ip nat inside source static udp 10.18.7.5 4365 209.165.200.225 4365
Which statement describes a route that has been learned dynamically?
It is automatically updated and maintained by routing protocols.
It is unaffected by changes in the topology of the network.
It has an administrative distance of 1.
It is identified by the prefix C in the routing table.
It is automatically updated and maintained by routing protocols.*
A network administrator is explaining to a junior colleague the use of the lt and gt keywords when filtering packets using an extended ACL. Where would the lt or gt keywords be used?
in an IPv6 extended ACL that stops packets going to one specific destination VLAN
in an IPv4 extended ACL that allows packets from a range of TCP ports destined for a specific network device
in an IPv4 named standard ACL that has specific UDP protocols that are allowed to be used on a specific server
in an IPv6 named ACL that permits FTP traffic from one particular LAN getting to another LAN
in an IPv4 extended ACL that allows packets from a range of TCP ports destined for a specific network device*
A network contains multiple VLANs spanning multiple switches. What happens when a device in VLAN 20 sends a broadcast Ethernet frame?
Only devices in VLAN 20 see the frame.
Devices in VLAN 20 and the management VLAN see the frame.
Only devices that are connected to the local switch see the frame.
All devices in all VLANs see the frame.
Only devices in VLAN 20 see the frame.*
Which two packet filters could a network administrator use on an IPv4 extended ACL? (Choose two.) computer type source TCP hello address ICMP message type destination UDP port number destination MAC address
ICMP message type*
destination UDP port number *
How is the router ID for an OSPFv3 router determined?
the highest IPv6 address on an active interface
the highest EUI-64 ID on an active interface
the highest IPv4 address on an active interface
the lowest MAC address on an active interface
the highest IPv4 address on an active interface*
Two employees in the Sales department work different shifts with their laptop computers and share the same Ethernet port in the office. Which set of commands would allow only these two laptops to use the Ethernet port and create violation log entry without shutting down the port if a violation occurs?
switchport mode access
switchport port-security
switchport mode access
switchport port-security
switchport port-security maximum 2
switchport port-security mac-address sticky
switchport port-security violation restrict
switchport mode access
switchport port-security maximum 2
switchport port-security mac-address sticky
switchport mode access
switchport port-security maximum 2
switchport port-security mac-address sticky
switchport port-security violation protect
switchport mode access
switchport port-security
switchport port-security maximum 2
switchport port-security mac-address sticky
switchport port-security violation restrict*
Which two factors are important when deciding which interior gateway routing protocol to use? (Choose two.)
speed of convergence scalability ISP selection the autonomous system that is used campus backbone architecture
speed of convergence*
scalability*
What caused the following error message to appear?
01: 11:12: %PM-4-ERR_DISABLE: psecure-violation error detected on Fa0/8, putting Fa0/8 in err-disable state
01: 11:12: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0011.a0d4.12a0 on port FastEthernet0/8.
01: 11:13: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/8, changed state to down
01: 11:14: %LINK-3-UPDOWN: Interface FastEthernet0/8, changed state to down
An unauthorized user tried to telnet to the switch through switch port Fa0/8.
NAT was enabled on a router, and a private IP address arrived on switch port Fa0/8.
Port security was enabled on the switch port, and an unauthorized connection was made on switch port Fa0/8.
Another switch was connected to this switch port with the wrong cable.
A host with an invalid IP address was connected to a switch port that was previously unused.
Port security was enabled on the switch port, and an unauthorized connection was made on switch port Fa0/8.*
Which two statements are characteristics of routed ports on a multilayer switch? (Choose two.)
In a switched network, they are mostly configured between switches at the core and distribution layers.
They support subinterfaces, like interfaces on the Cisco IOS routers.
The interface vlan command has to be entered to create a VLAN on routed ports.
They are used for point-to-multipoint links.
They are not associated with a particular VLAN.
In a switched network, they are mostly configured between switches at the core and distribution layers.*
They are not associated with a particular VLAN.*
A network administrator is adding ACLs to a new IPv6 multirouter environment. Which IPv6 ACE is automatically added implicitly at the end of an ACL so that two adjacent routers can discover each other?
permit ip any host ip_address
permit icmp any any nd-na
permit ip any any
deny ip any any
permit icmp any any nd-na
What does the cost of an OSPF link indicate?
A lower cost indicates a better path to the destination than a higher cost does.
Cost equals bandwidth.
A higher cost for an OSPF link indicates a faster path to the destination.
Link cost indicates a proportion of the accumulated value of the route to the destination.
A lower cost indicates a better path to the destination than a higher cost does.*
On a switch that is configured with multiple VLANs, which command will remove only VLAN 100 from the switch?
Switch(config)# no vlan 100
Switch(config-if)# no switchport access vlan 100
Switch(config-if)# no switchport trunk allowed vlan 100
Switch# delete flash:vlan.dat
Switch(config)# no vlan 100*
A router needs to be configured to route within OSPF area 0. Which two commands are required to accomplish this? (Choose two.)
RouterA(config-router)# network 192.168.2.0 255.255.255.0 0
RouterA(config-router)# network 192.168.2.0 0.0.0.255 0
RouterA(config)# router ospf 1
RouterA(config-router)# network 192.168.2.0 0.0.0.255 area 0
RouterA(config)# router ospf 0
RouterA(config)# router ospf 1*
RouterA(config-router)# network 192.168.2.0 0.0.0.255 area 0*
What is a function of the distribution layer?
interconnection of large-scale networks in wiring closets
network access to the user
fault isolation
high-speed backbone connectivity
interconnection of large-scale networks in wiring closets*
A small-sized company has 20 workstations and 2 servers. The company has been assigned a group of IPv4 addresses 209.165.200.224/29 from its ISP. What technology should the company implement in order to allow the workstations to access the services over the Internet?
static NAT
dynamic NAT
port address translation
DHCP
dynamic NAT*
Which three requirements are necessary for two OSPFv2 routers to form an adjacency? (Choose three.)
The link interface subnet masks must match.
The two routers must include the inter-router link network in an OSPFv2 network command.
The OSPFv2 process ID must be the same on each router.
The OSPF hello or dead timers on each router must match.
The OSPFv2 process is enabled on the interface by entering the ospf process area-id command.
The link interface on each router must be configured with a link-local address.
The link interface subnet masks must match.
The two routers must include the inter-router link network in an OSPFv2 network command.
The OSPF hello or dead timers on each router must match.*
Which three pieces of information does a link-state routing protocol use initially as link-state information for locally connected links? (Choose three.)
the cost of that link the type of network link the link bandwidth the link next-hop IP address the link router interface IP address and subnet mask
the cost of that link*
the type of network link*
the link router interface IP address and subnet mask*
What is a disadvantage of NAT?
The internal hosts have to use a single public IPv4 address for external communication.
There is no end-to-end addressing.
The costs of readdressing hosts can be significant for a publicly addressed network.
The router does not need to alter the checksum of the IPv4 packets.
There is no end-to-end addressing.*
What best describes the operation of distance vector routing protocols?
They use hop count as their only metric.
They send their routing tables to directly connected neighbors.
They flood the entire network with routing updates.
They only send out updates when a new network is added.
They send their routing tables to directly connected neighbors.*
A network administrator is using the router-on-a-stick method to configure inter-VLAN routing. Switch port Gi1/1 is used to connect to the router. Which command should be entered to prepare this port for the task?
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# spanning-tree vlan 1
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# spanning-tree portfast
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# switchport mode trunk
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# switchport access vlan 1
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# switchport mode trunk*
Which three advantages are provided by static routing? (Choose three.)
The path a static route uses to send data is known.
No intervention is required to maintain changing route information.
Static routing does not advertise over the network, thus providing better security.
Static routing typically uses less network bandwidth and fewer CPU operations than dynamic routing does.
Configuration of static routes is error-free.
Static routes scale well as the network grows.
The path a static route uses to send data is known.*
Static routing does not advertise over the network, thus providing better security.*
Static routing typically uses less network bandwidth and fewer CPU operations than dynamic routing does.*
When configuring a switch to use SSH for virtual terminal connections, what is the purpose of the crypto key generate rsa command?
show active SSH ports on the switch disconnect SSH connected hosts create a public and private key pair show SSH connected hosts access the SSH database configuration
create a public and private key pair*
Which information does a switch use to populate the MAC address table?
the destination MAC address and the outgoing port
the source MAC address and the incoming port
the source and destination MAC addresses and the incoming port
the source MAC address and the outgoing port
the source and destination MAC addresses and the outgoing port
the destination MAC address and the incoming port
the source MAC address and the incoming port*
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
What is the problem preventing PC0 and PC1 from communicating with PC2 and PC3?
The routers are using different OSPF process IDs.
The serial interfaces of the routers are in different subnets.
No router ID has been configured on the routers.
The gigabit interfaces are passive.
The serial interfaces of the routers are in different subnets.*
Which problem is evident if the show ip interface command shows that the interface is down and the line protocol is down?
The no shutdown command has not been issued on the interface.
There is an IP address conflict with the configured address on the interface.
A cable has not been attached to the port.
An encapsulation mismatch has occurred.
A cable has not been attached to the port.*
Which three values or sets of values are included when creating an extended access control list entry? (Choose three.)
access list number between 100 and 199
source subnet mask and wildcard mask
default gateway address and wildcard mask
source address and wildcard mask
destination subnet mask and wildcard mask
access list number between 1 and 99
destination address and wildcard mask
access list number between 100 and 199*
source address and wildcard mask*
destination address and wildcard mask*
A network administrator is designing an ACL. The networks 192.168.1.0/25, 192.168.0.0/25, 192.168.0.128/25, 192.168.1.128/26, and 192.168.1.192/26 are affected by the ACL. Which wildcard mask, if any, is the most efficient to use when specifying all of these networks in a single ACL permit entry?
- 0.0.127
- 0.0.255
- 0.1.255
- 0.255.255
0.0.1.255*
Which kind of message is sent by a DHCP client when its IP address lease has expired?
a DHCPREQUEST unicast message
a DHCPREQUEST broadcast message
a DHCPDISCOVER broadcast message
a DHCPDISCOVER unicast message
a DHCPREQUEST unicast message*
What happens immediately after two OSPF routers have exchanged hello packets and have formed a neighbor adjacency?
They request more information about their databases.
They negotiate the election process if they are on a multiaccess network.
They exchange DBD packets in order to advertise parameters such as hello and dead intervals.
They exchange abbreviated lists of their LSDBs
They exchange abbreviated lists of their LSDBs*
What benefit does NAT64 provide?
It allows sites to use private IPv4 addresses, and thus hides the internal addressing structure from hosts on public IPv4 networks.
It allows sites to connect multiple IPv4 hosts to the Internet via the use of a single public IPv4 address.
It allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses.
It allows sites to use private IPv6 addresses and translates them to global IPv6 addresses.
It allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses.*
What is the purpose of setting the native VLAN separate from data VLANs?
The native VLAN is for routers and switches to exchange their management information, so it should be different from data VLANs.
A separate VLAN should be used to carry uncommon untagged frames to avoid bandwidth contention on data VLANs.
The native VLAN is for carrying VLAN management traffic only.
The security of management frames that are carried in the native VLAN can be enhanced
A separate VLAN should be used to carry uncommon untagged frames to avoid bandwidth contention on data VLANs.*
Which command, when issued in the interface configuration mode of a router, enables the interface to acquire an IPv4 address automatically from an ISP, when that link to the ISP is enabled?
ip helper-address
ip address dhcp
ip dhcp pool
service dhcp
ip address dhcp*
Which statement is correct about IPv6 routing?
IPv6 routing is enabled by default on Cisco routers.
IPv6 routes appear in the same routing table as IPv4 routes.
IPv6 uses the link-local address of neighbors as the next-hop address for dynamic routes.
IPv6 only supports the OSPF and EIGRP routing protocols
IPv6 uses the link-local address of neighbors as the next-hop address for dynamic routes.*
A router has used the OSPF protocol to learn a route to the 172.16.32.0/19 network. Which command will implement a backup floating static route to this network?
ip route 172.16.32.0 255.255.0.0 S0/0/0 100
ip route 172.16.32.0 255.255.224.0 S0/0/0 200
ip route 172.16.0.0 255.255.240.0 S0/0/0 200
ip route 172.16.0.0 255.255.224.0 S0/0/0 100
ip route 172.16.32.0 255.255.224.0 S0/0/0 200*
Which two commands can be used to verify the content and placement of access control lists? (Choose two.)
show processes show cdp neighbor show access-lists show ip route show running-config
show access-lists*
show running-config*
Which type of traffic would most likely have problems when passing through a NAT device?
IPsec DNS Telnet HTTP ICMP
IPsec*
Fill in the blank.
Static routes are configured by the use of the _____ global configuration command.
ip route
A network technician has been asked to secure all switches in the campus network. The security requirements are for each switch to automatically learn and add MAC addresses to both the address table and the running configuration. Which port security configuration will meet these requirements?
auto secure MAC addresses
dynamic secure MAC addresses
static secure MAC addresses
sticky secure MAC addresses
sticky secure MAC addresses*
Which three pairs of trunking modes will establish a functional trunk link between two Cisco switches? (Choose three.)
dynamic desirable – dynamic auto
dynamic auto – dynamic auto
access – dynamic auto
dynamic desirable – dynamic desirable
access – trunk
dynamic desirable – trunk
dynamic desirable – dynamic auto*
dynamic desirable – dynamic desirable*
dynamic desirable – trunk*
Fill in the blank.
The OSPF Type 1 packet is the ______ packet
__hello___
Which value represents the “trustworthiness” of a route and is used to determine which route to install into the routing table when there are multiple routes toward the same destination?
routing protocol
outgoing interface
metric
administrative distance
administrative distance*
Which type of router memory temporarily stores the running configuration file and ARP table?
flash
NVRAM
RAM
ROM
RAM*
Fill in the blank.
The default administrative distance for a static route is
1
Fill in the blank.
Static routes are configured by the use of the global configuration command :
ip route
Refer to the exhibit. If the switch reboots and all routers have to re-establish OSPF adjacencies, which routers will become the new DR and BDR?
Router R3 will become the DR and router R1 will become the BDR.
Router R1 will become the DR and router R2 will become the BDR.
Router R4 will become the DR and router R3 will become the BDR.
Router R1 will become the DR and router R2 will become the BDR.
Router R4 will become the DR and router R3 will become the BDR.*
What is the purpose of an access list that is created as part of configuring IP address translation?
The access list permits or denies specific addresses from entering the device doing the translation.
The access list defines the private IP addresses that are to be translated.
The access list prevents external devices from being a part of the address translation.
The access list defines the valid public addresses for the NAT or PAT pool.
The access list defines the private IP addresses that are to be translated.*
The computers used by the network administrators for a school are on the 10.7.0.0/27 network. Which two commands are needed at a minimum to apply an ACL that will ensure that only devices that are used by the network administrators will be allowed Telnet access to the routers? (Choose two.)
-ip access-group 5 out
-access-list standard VTY
permit 10.7.0.0 0.0.0.127
- access-list 5 deny any
- access-list 5 permit 10.7.0.0 0.0.0.31
- ip access-group 5 in
- access-class 5 in
- access-list 5 permit 10.7.0.0 0.0.0.31*
- access-class 5 in*
While analyzing log files, a network administrator notices reoccurring native VLAN mismatches. What is the effect of these reoccurring errors?
The control and management traffic on the error-occurring trunk port is being misdirected or dropped.
Unexpected traffic on the error-occurring trunk port is being received.
All traffic on the error-occurring trunk port is being misdirected or dropped.
All traffic on the error-occurring trunk port is being switched correctly regardless of the error.
The control and management traffic on the error-occurring trunk port is being misdirected or dropped.*
Which two characteristics describe the native VLAN? (Choose two.)
This VLAN is necessary for remote management of a switch.
Designed to carry traffic that is generated by users, this type of VLAN is also known as the default VLAN.
The native VLAN provides a common identifier to both ends of a trunk.
The native VLAN traffic will be untagged across the trunk link.
High priority traffic, such as voice traffic, uses the native VLAN.
The native VLAN provides a common identifier to both ends of a trunk.*
The native VLAN traffic will be untagged across the trunk link.*
Refer to the exhibit. The Branch Router has an OSPF neighbor relationship with the HQ router over the 198.51.0.4/30 network. The 198.51.0.8/30 network link should serve as a backup when the OSPF link goes down. The floating static route command ip route 0.0.0.0 0.0.0.0 S0/1/1 100 was issued on Branch and now traffic is using the backup link even when the OSPF link is up and functioning. Which change should be made to the static route command so that traffic will only use the OSPF link when it is up?
Add the next hop neighbor address of 198.51.0.8.
Change the administrative distance to 1.
Change the destination network to 198.51.0.5.
Change the administrative distance to 120.
Change the administrative distance to 120.*
