Set of flashcards CCNA 200-125 (Page 5 of 12)

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Category	Computer Science
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Created / Updated	20.02.2017 / 03.10.2024
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What two things does a router do when it forwards a packet? (Choose two)

updates the destination IP address.

switches the packet to the appropriate outgoing interfaces.

determines the next hop on the path.

computes the destination host address.

forwards ARP requests.

View the exhibit. Based on the exhibited routing table, how will packets from a host within the 192.168.10.192/26 LAN be forwarded to 192.168.10.1?

The router will forward packets from RT3 to RT1.

The router will forward packets from RT3 to RT2 to RT1.

The router will forward packets from RT3 to RT2 to RT1 AND from RT3 to RT1.

The router will forward packets from RT3 to RT1 to RT2.

What are the two default metrics used by EIGRP for route selection? (Choose two.)

Bandwidth

MTU

Reliability

Delay

Load

Which statements describe the routing protocol OSPF? (Select three)

It increases routing overhead over the network

It confines network instability to one area of network

It is used to route between Autonomous System

It supports VLSM

It allows extensive control of the routing updates

Why do large OSPF networks use a hierarchical design? (Choose three)

to reduce the complexity of router configuration.

to confine network instability to single areas of the network.

to speed up convergence.

to lower costs by replacing routers with distribution layer switches.

to reduce routing overhead.

Which statement about slow inter-VLAN forwarding is true?

The VLANs are experiencing slowness because multiple devices are connected to the same hub.

The local VLAN is working normally, but traffic to the alternate VLAN is forwarded slower than expected.

The VLANs are experiencing slowness due to a duplex mismatch.

The VLAN is experiencing slowness in the point-to-point collisionless connection.

The entire VLAN is experiencing slowness.

A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?

the EIGRP route

the OSPF route

the OSPF and RIPv2 routes

all three routes

the RIPv2 route

Which option describes a difference between EIGRP for IPv4 and IPv6?

Only EIGRP for IPv6 is enabled in the global configuration mode.

Only EIGRP for IPv6 requires a router ID to be configured under the routing process.

Only EIGRP for IPv6 advertises all connected networks.

AS numbers are configured in EIGRP but not in EIGRPv3.

What command sequence will configure a router to run OSPF and add network 10.1.1.0 /24 to area 0?

router ospf area 0, network 10.1.1.0 0.0.0.255 area 0

router ospf, network 10.1.1.0 0.0.0.255

router ospf area 0, network 10.1.1.0 255.255.255.0 area 0

router ospf 1, network 10.1.1.0 0.0.0.255 area 0

router ospf, network 10.1.1.0 255.255.255.0 area 0F router ospf 1, network 10.1.1.0 0.0.0.255

Which command is used to display the collection of OSPF link states?

show ip ospf neighbors

show ip ospf lsa database

show ip ospf database

show ip ospf linkstate

Which command enables IPv6 forwarding on a Cisco router?

ipv6 unicast-routing

ipv6 host

ipv6 neighbor

ipv6 local

What information can be used by a router running a linkstate protocol to build and maintain its topological database? (Choose two.)

Beacons received on pointtopoint links

SAP messages sent by other routers

Routing tables received from other linkstate routers

Hello packets

LSAs from other routers

Which three elements must be used when you configure a router interface for vlan trunking? (Choose three)

A management domain for each subinterface.

Subinterface encapsulation identifiers that match vlan tags.

One IP network or subnetwork for each subinterface.

One subinterface per vlan.

Subinterface numbering that matches vlan tags.

Which EIGRP for IPv6 command can you enter to view the link-local addresses of the neighbors of a device?

show ipv6 route eigrp

show ipv6 eigrp neighbors

show ipv6 eigrp 20 interfaces

show ip eigrp traffic

Which dynamic routing protocol uses only the hop count to determine the best path to a destination?

RIP

IGRP

OSPF

EIGRP

RT1 is unable to establish an OSPF neighbor relationship with RT3. What are possible reasons for this problem? (Choose Two)

EIGRP is also configured on these routers with a lower administrative distance.

A static route has been configured from RT1 to RT3 and prevents the neighbor adjacency from being established.

All of the routers need to be configured for backbone Area 1.

The hello and dead interval timers are not set to the same values on RT1 and RT3.

RT1 and RT3 are configured in different areas.

Which type of device can be replaced by the use of subinterfaces for VLAN routing?

Layer 3 switch

Router

Layer 2 bridge

Layer 2 switch

What are two enhancements that OSPFv3 supports over OSPFv2? (Choose two)

It can support multiple IPv6 subnets on a single link.

It requires the use of ARP.

It routes over links rather than over networks.

It supports up to 2 instances of OSPFv3 over a common link.

View the exhibit. Which two statements are true about interVLAN routing in the topology that is shown in the exhibit? (Select two)

Host E and host F use the same IP gateway address.

The FastEthernet 0/0 interface on RT1 must be configured with subinterfaces.

The FastEthernet 0/0 interface on RT1 and SW2 trunk ports must be configured using the same encapsulation type.

RT1 will not play a role in communications between host A and host D.

RT1 and SW2 should be connected via a crossover cable.

View the exhibit, Host A pings interface S0/0 on Router3. What is the TTL value for that ping?

254

253

255

252

What are two drawbacks of implementing a link-state routing protocol? (Select two)

The requirement for a hierarchical IP addressing scheme for optimal functionality.

The high volume of link-state advertisements in a converged network.

The large size of the topology table listing all advertised routes in the converged network.

The sequencing and acknowledgment of link-state packets.

The high demand on router resources to run the link-state routing algorithm.

The internetwork infrastructure of company XYZ consists of a single OSPF area as shown in the graphic. There is concern that a lack of router resources is impeding internetwork performance. As part of examining the router resources, the OSPF DRs need to be known. All the router OSPF priorities are at the default and the router IDs are shown with each router. Which routers are likely to have been elected as DR? (Select two)

Br-1

Br-2

Corp-2

Corp-3

Corp-4

Which three statements about link-state routing are true? (Choose three.)

Updates are sent to a multicast address by default.

It uses split horizon.

RIP is a link-state protocol.

Routes are updated when a change in topology occurs.

OSPF is a link-state protocol.

Which command can you enter to set the default route for all traffic to an interface?

Router(configrouter)# default-information originate

Router(config)#ip route 0.0.0.0 255.255.255.255 GigabitEthernet0/1

Router(configrouter)# default-information originate always

Router(config)#ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/1

Refer to the exhibit. Router Edge-1 is unable to establish OSPF neighbor adjacency with router ISP-1. Which two configuration changes can you make on Edge-1 to allow the two routers to establish adjacency? (Choose two.)

Reduce the MTU on Edge-1 to 1500.

Configure the ip ospf mtu-ignore command on the Edge-1 Gi0/0 interface.

Set the OSPF cost on Edge-1 to 1522.

Set the subnet mask on Edge-1 to 255 255.255.252.

Reduce the MTU on Edge-1 to 1514.

A network administrator is configuring the routers in the graphic for OSPF. The OSPF process has been started and the networks have been configured for Area 0 as shown in the exhibit. The network administrator has several options for configuring router RT2 to ensure that it will be preferred as the designated router (DR) for the 172.16.1.0/24 LAN segment. What configuration tasks could be used to establish this preference? (Choose three)

Configure the priority value of the Fa0/0 interface of router RT2 to a higher value than any other interface on the Ethernet network.

Change the priority values of the Fa0/0 interfaces of router RT1 and router RT3 to zero.

Change the router id for router RT2 by assigning the IP address 172.16.1.130/24 to the Fa0/0 interface of router RT2.

Change the priority value of the Fa0/0 interface of router RT2 to zero.

Configure a loopback interface on router RT2 with an IP address higher than any IP address on the other routers.

Which two of these functions do routers perform on packets? (Select two)

Update the Layer 3 headers of outbound packets so that the packets are properly directed to their ultimate destinations.

Update the Layer 2 headers of outbound packets with the MAC addresses of the next hops.

Update the Layer 3 headers of outbound packets so that the packets are properly directed to valid next hops.

Examine the Layer 3 headers of inbound packets and use that information to determine the next hops for the packets.

Examine the Layer 2 headers of inbound packets and use that information to determine the next hops for the packets.

Which value is indicated by the next hop in a routing table?

Preference of the route source

How the route was learned

Exit interface IP address for forwarding the packets

IP address of the remote router for forwarding the packets

You enter the show ipv6 route command on an OSPF device and the device displays a route. Which conclusion can you draw about the environment?

OSPF is distributing IPv6 routes to BGP.

The router is designated as totally stubby.

OSPFv3 is in use.

The router is designated as an ABR.

The network shown in exhibit uses EIGRP as the routing protocol. What path will packets take from a host on the 192.168.10.192/26 network to a host on the LAN attached to router RT1?

The path of the packets will be RT3 to RT2 to RT1.

The path of the packets will be both RT3 to RT2 to RT1 and RT3 and RT1.

The path of the packets will be RT3 to RT1.

The path of the packets will be RT3 to RT1 to RT2.

Which configuration can you apply to enable encapsulation on a subinterface?

interface FastEthernet 0/0.30, encapsulation dot1Q 30, ip address 10.1.1.30 255.255.255.0

interface FastEthernet 0/0.30, description subinterface vlan 30

interface FastEthernet 0/0.30, ip address 10.1.1.30 255.255.255.0

interface FastEthernet 0/0, encapsulation dot1Q 30, ip address 10.1.1.30 255.255.255.0

What two things will a router do when running a distance vector routing protocol? (Select two)

Use the shortest-path algorithm to the determine best path.

Send entire routing table to all routers in the routing domain.

Maintain the topology of the entire network in its database.

Update the routing table based on updates from their neighbors.

Send periodic updates regardless of topology changes.

View the exhibit. Given the output for this command, if the router ID has not been manually set, what router ID will OSPF use for this router?

10.1.1.2

172.16.5.1

192.168.5.3

10.154.154.1

Which component of a routing table entry represents the subnet mask?

Network mask

Routing protocol code

Metric

Prefix

Which three statements about static routing are true? (Choose three.)

It uses consistent route determination.

It is best used for small-scale deployments.

Routers can use update messages to reroute when links fail.

It requires more resources than other routing methods.

Routing is disrupted when links fail.

What are two benefits of using a single OSPF area network design? (Choose two.)

It removes the need for virtual links.

It increases LSA response times.

It reduces the number of required OSPF neighbor adjacencies.

It is less CPU Intensive for routers in the single area.

It reduces the types of LSAs that are generated.

View the exhibit. Which address and mask combination represents a summary of the routes learned by EIGRP?

192.168.25.0 255.255.255.240

192.168.25.16 255.255.255.240

192.168.25.16 255.255.255.252

192.168.25.28 255.255.255.240

192.168.25.28 255.255.255.252

Which command can you enter to verify that a BGP connection to a remote device is established?

show ip bgp paths

show ip bgp summary

show ip community-list

show ip route

Assuming that all OSPF routers in a particular area are configured with identical priority values, which of the following values would a router use for OSPF router ID when it does not have a loopback interface?

The lowest IP address among its active interfaces.

The priority value until a loopback interface is configured.

The highest IP address among its active interfaces.

The IP address of the first Fast Ethernet interface.

The IP address of the console management interface.

Which two statements about the OSPF Router ID are true? (Choose two.)

The router automatically chooses the IP address of a loopback as the OSPF Router ID.

It is created using the MAC Address of the loopback interface.

It identifies the source of a Type 1 LSA.

It should be the same on all routers in an OSPF routing instance.

By default, the lowest IP address on the router becomes the OSPF Router ID.

CCNA 200-125

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