Module 14: Routing Concepts

What table does a router use to determine how to forward an IP packet?

A. ARP table
B. MAC address table
C. neighbor cache
D. routing table

D. routing table

What action will a router take on a packet with a destination IP address that is on a remote network?

A. It will forward the packet directly to the device with the destination IP address of the packet.
B. It will forward the packet to a next-hop router.
C. It will forward the packet to an Ethernet switch.
D. It will drop the packet.

B. It will forward the packet to a next-hop router.

Which of the following routes may be found in a routing table? (Choose all that apply.)

A. directly connected networks
B. static routes
C. dynamic routing protocol routes
D. default route

A. directly connected networks
B. static routes
C. dynamic routing protocol routes
D. default route

What is used to determine the minimum number of far-left bits that must match between the prefix in the route entry and the destination IP address.

A. prefix length in the routing table entry
B. prefix length of the destination IP address
C. the classful address of the network address

A. prefix length in the routing table entry

If a router needs to send an ARP Request for the destination IPv4 address of the packet, this means the packet will be forwarded:

A. To a next-hop router
B. To the device with the destination IPv4 address of the packet

B. To the device with the destination IPv4 address of the packet

If a router needs to send an ARP Request for the IPv4 address in one of its route entries, this means the packet will be forwarded:

A. To a next-hop router
B. To the device with the destination IPv4 address of the packet

A. To a next-hop router

Which packet forwarding method is used by default on Cisco routers?

A. process switching
B. fast switching
C. Cisco Express Forwarding
D. Ethernet switching

C. Cisco Express Forwarding

Which routing table principle is not correct?

A. Every router makes its decision alone, based on the information it has in its own routing table.
B. The fact that one router has certain information in its routing table does not mean that other routers have the same information.
C. Routing information about a path from one network to another also provides routing information about the reverse, or return, path.

C. Routing information about a path from one network to another also provides routing information about the reverse, or return, path.

Which route entry would be used for a packet with a destination IP address that matches an IP address of one of the router interfaces?

A. C for Directly Connected
B. L for Local
C. S for Static
D. depends on the source of the route

B. L for Local

What type of network is accessed by a single route and the router has only one neighbor?

A. Stub network
B. Directly connected network
C. Next-hop network
D. Local network

A. Stub network

Which two route sources have the ability to automatically discover a new best path when there is a change in the topology? (Choose two.)

A. Static route
B. OSPF
C. EIGRP
D. Default route

B. OSPF
C. EIGRP

True or False? A default route can only be a static route.

A. True
B. False

B. False

A network administrator configures a static route for the same destination network that was learned automatically by the router using OSPF. Which route will be installed and why?

A. Static route because it has a lower metric
B. Static route because it has a lower administrative distance
C. OSPF route because it has a lower metric
D. OSPF route because it has a lower administrative distance

B. Static route because it has a lower administrative distance

Which type of routing automatically adapts to topology changes?

A. static routes
B. dynamic routing protocols
C. both static routes and dynamic routing protocols

B. dynamic routing protocols

What type of routing is typically used with a stub network?

A. static routes
B. dynamic routing protocol

A. static routes

What metric is used by OSPF to determine the best path?

A. hop count
B. cost
C. bandwidth and delay
D. decided by the network administrator

B. cost

What term is used to describe routing over two or more paths to a destination with equal cost metrics?

A. equal path selection
B. equal packet forward
C. equal cost load balancing
D. equal cost routing

C. equal cost load balancing

Which feature on a Cisco router permits the forwarding of traffic for which there is no specific route?

A. next-hop
B. gateway of last resort
C. outgoing interface
D. route source

B. gateway of last resort

Which three advantages are provided by static routing? (Choose three.)

A. Static routing does no advertise over the network, thus providing better security.
B. No intervention is required to maintain changing route information.
C. Static routes scale well as the network grows.
D. The path a static route uses to send data is known.
E. Configuration of static routes is error-free.
F. Static routing typically uses less network bandwidth and fewer CPU operations than dynamic routing does.

A. Static routing does no advertise over the network, thus providing better security.
D. The path a static route uses to send data is known.
F. Static routing typically uses less network bandwidth and fewer CPU operations than dynamic routing does.

What are two functions of dynamic routing protocols? (Choose two.)

A. to discover the network
B. to avoid exposing network information
C. to assure low router overhead
D. to choose the path that is specified by the administrator
E. to maintain routing tables

A. to discover the network
E. to maintain routing tables

What is an advantage of using dynamic routing protocols instead of static routing?

A. fewer router resource overhead requirements
B. easier to implement
C. more secure in controlling routing updates
D. ability to actively search for new routes if the current path becomes unavailable

D. ability to actively search for new routes if the current path becomes unavailable

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?

A. outgoing interface
B. routing protocol
C. metric
D. administrative distance

D. administrative distance

Which packet-forwarding method does a router use to make switching decisions when it is using a forwarding information base and an adjacency table?

A. fast switching
B. process switching
C. Cisco Express Forwarding
D. flow process

C. Cisco Express Forwarding

Which type of route would typically be used on a border router so that devices inside the company could access the Internet?

A. static
B. directly connected
C. summary
D. default

D. default

What are two functions of a router? (Choose two.)

A. It provides segmentation at Layer 2.
B. A router connects multiple IP networks.
C. It determines the best path to send packets.
D. It builds a routing table based on ARP requests.
E. It controls the flow of data via the use of Layer 2 addresses.

B. A router connects multiple IP networks.
C. It determines the best path to send packets.

When a router learns that multiple paths are available to a destination network from the same routing protocol, which factor is considered by a router to choose the best path to forward a packet?

A. the reliability value of the neighboring routers
B. the fastest bandwidth of exiting interfaces
C. the lowest metric
D. the order of paths on the routing table

C. the lowest metric

Which two route source codes are automatically created within a routing table whenever a router interface is configured with an IP address and activated? (Choose two.)

A. D
B. S
C. C
D. L
E. O

C. C
D. L

The output of the show ip route command contains the following entry:

A. metric
B. interface ID through which the network can be reached
C. number of hops
D. administrative distance

D. administrative distance

Which type of static route creates a gateway of last resort?

A. summary static route
B. standard static route
C. floating static route
D. default static route

D. default static route

What are two common types of static routes in routing tables? (Choose two)

A. a static route converted from a route that is learned through a dynamic routing protocol
B. a static route to a specific network
C. a default static route
D. a static route shared between two neighboring routers
E. a built-in static route by IOS

B. a static route to a specific network
C. a default static route

What are two reasons why an administrator might choose to use static routing rather than dynamic routing? (Choose two.)

A. Static routing uses less router processing and bandwidth.
B. Static routing is easier to maintain in large networks.
C. Static routing does not require complete knowledge of the whole network.
D. Static routing is more secure.
E. Static routing is more scalable.

A. Static routing uses less router processing and bandwidth.
D. Static routing is more secure.

What address and prefix length is used when configuring an IPv6 default static route?

A. ::1/128
B. FF02::1/8
C. ::/0
D. 0.0.0.0/0

C. ::/0

What are two advantages of static routing over dynamic routing? (Choose two.)

A. Static routing is more secure because it does not advertise routes to other routers.
B. Static routing is relatively easy to configure for large networks.
C. Static routing requires very little knowledge of the network for correct implementation.
D. Static routing scales well with expanding networks.
E. Static routing uses fewer router resources than dynamic routing.

A. Static routing is more secure because it does not advertise routes to other routers.
E. Static routing uses fewer router resources than dynamic routing.

What type of route allows a router to forward packets even though its routing table contains no specific route to the destination network?

A. default route
B. destination route
C. dynamic route
D. generic route

A. default route

The network administrator configures the router with the ip route 172.16.1.0 255.255.255.0 172.16.2.2 command. How will this route appear in the routing table?

A. C 172.16.1.0 [1/0] via 172.16.2.2
B. C 172.16.1.0 is directly connected, Serial0/0
C. S 172.16.1.0 [1/0] via 172.16.2.2
D. S 172.16.1.0 is directly connected, Serial0/0

C. S 172.16.1.0 [1/0] via 172.16.2.2

R1 is configured with the ip route 10.1.0.0 255.255.0.0 g0/0/0 command. What happens if the G0/0/0 interface goes down?

A. The manually configured route remains in the routing table.
B. The router polls neighbors for a replacement route.
C. The router redirects the static route to a backup interface.
D. The static route is removed from the routing table.

D. The static route is removed from the routing table.

What static route identifies the gateway IP address to which the router sends all IP packets for which it does not have a learned route?

A. Default static route
B. Floating static route
C. Generic static route
D. Summary static route

A. Default static route

On which type of network would a dynamic routing protocol be implemented in?

A. On a home network router with wireless clients.
B. On a network that commonly experiences topology changes.
C. On a small two router network.
D. On a stub network connecting to a provider.

B. On a network that commonly experiences topology changes.

Which value in a routing table is used to compare routes received from a routing protocol?

A. administrative distance
B. metric
C. outgoing interface
D. routing protocol

B. metric

A network administrator configures the G0/0/0 interface with the ip address 10.1.1.0 255.255.255.0 command. However, when the administrator issues the show ip route command, the routing table does not show the directly connected network. What is the possible cause of the problem?

A. No packets with a destination network of 172.16.1.0 have been sent to R1.
B. The configuration needs to be saved first.
C. The G0/0/0 interface has not been activated.
D. The subnet mask is incorrect for the IPv4 address.

C. The G0/0/0 interface has not been activated.