Switching, Routing, and Wireless Essentials chapters 14-16

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

L for local

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

Lowest metric

Which two methods can be used to identify next hop in static route?

Next hop IP address Exit interface

Which two route sources have ability to automatically discover new best path when there is change in topology?

OSPF EIGRP

Which three advantages are provided by static routing?

Static routing does not advertise over network, thus providing better security. Static routing typically uses less network bandwidth and fewer CPU operations than dynamic routing does. The path a static route uses to send data is known.

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

Static route because it has lower administrative distance

What type of routing is typically used with stub network?

Static routes

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

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

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

Stub network

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

To next-hop router

How is destination network in IPv6 static route identified?

Using IPv6 prefix and prefix length

Which IPv4 static route statement is true?

Using exit interface only is common in point-to-point configuration.

Network administrator has entered the following command: ip route 192.168.10.64 255.255.255.192 serial0/0/1 When network administrator enters command show ip route, route is not in routing table. What should administrator do next?

Verify that serial 0/0/1 interface is active and available.

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

ability to actively search for new routes if current path becomes unavailable​

What type of static route is created when next-hop IP address and exit interface are specified?

fully specified static route

What is the correct syntax of floating static route?

ip route 209.165.200.228 255.255.255.248 10.0.0.1 120

Which static route statement shows recursive IPv6 static route?

ipv6 route 2001:db8:cafe:1::/56 2001:db8:1000:10::1

Which command would create a valid IPv6 default route?

ipv6 route ::/0 2001:db8:acad:2::a

What network address and subnet mask combination would be used to create a default static route that matches any IPv4 destination?

0.0.0.0 0.0.0.0

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

::/0

Which value represents the "trustworthiness" of route and is used to determine which route to install into routing table when there are multiple routes toward same destination? The output of the show ip route command contains the following entry: S 10.2.0.0 [1/0] via 172.16.2.2. What value is indicated by the 1 in the [1/0] portion of the output?

Administrative distance

Network administrator uses the command ip route 172.18.0.0 255.255.0.0 S0/0/1 to configure floating static route on router. That route will function as backup route to reach EIGRP learned network 172.18.0.0/16. After this configuration, EIGRP route is removed from routing table even though EIGRP is still functioning properly. Why is static route not functioning as intended?

Administrative distance value is not high enough on static route

Which two route source codes are automatically created within routing table whenever router interface is configured with IP address and activated?

C L

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

Cisco Express Forwarding

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

Cisco Express Forwarding

What metric is used by OSPF to determine best path?

Cost

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

Default

Which type of static route creates gateway of last resort?

Default static route

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

Default static route Static route to specific network

What will router do if it does not have default route configured and packet needs to be forwarded to destination network that is not listed in routing table?

Drop it

Which type of routing automatically adapts to topology changes?

Dynamic routing protocols

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

Equal cost load balancing

Which sequence correctly identifies order of steps that router will perform when it receives packet on Ethernet interface?

Examines destination MAC address. Identifies Ethernet Type field. De-encapsulates Ethernet frame. Examines destination IP address.

A default route can only be a static route.

False

Which type of static route typically uses distance parameter in ip route global configuration command?

Floating static route

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

Gateway of last resort

What command, or set of commands, would be used to determine if the following configuration on router HQ works as designed? ip route 0.0.0.0 0.0.0.0 serial 0/0/0 10 ip route 0.0.0.0 0.0.0.0 serial 0/1/0

HQ(config)# interface serial 0/1/0 HQ(config-if)# shutdown HQ(config-if)# end HQ# show ip route

Network administrator is configuring route to forward packets to specific web server. What type of route should be configured by administrator?

Host route

What is a characteristic of default static route? ​

Identifies gateway IP address to which router sends all IP packets for which it does not have learned or static route.

What is the purpose of floating static route?

It allows alternate connection to be used when preferred link fails.

Which statement describes sequence of processes executed by router when it receives packet from host to be delivered to host on another network?

It de-encapsulates packet, selects appropriate path, and encapsulates packet to forward it toward destination host.

What are two functions of router?

It determines best path to send packets. Router connects multiple IP networks.

What does the letter C mean next to an entry in the output of the show ip route command?

It identifies a network that is directly connected to the router.

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

It will forward packet to next-hop router.

Static route has been configured on router. However, destination network no longer exists. What should administrator do to remove static route from routing table?

Remove route using no ip route command.

Which IPv6 static route would serve as backup route to dynamic route learned through OSPF?

Router1(config)# ipv6 route 2001:db8:acad:1::/32 2001:db8:acad:6::2 200

Which routing table principle is not correct?

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

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

Routing table

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

To device with destination IPv4 address of packet

Which of the following routes may be found in routing table?

directly connected networks static routes dynamic routing protocol routes default route

Which type of static route that is configured on router uses only exit interface?

directly connected static route

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

prefix length in routing table entry

Network administrator has entered static route to Ethernet LAN that is connected to adjacent router. However, route is not shown in routing table. Which command would administrator use to verify that exit interface is up?

show ip interface brief

Network administrator notices that correctly entered static route is not in routing table. What two router commands would administrator use to determine if exit interface was up and next hop address is available?

show ip interface brief ping

Which three IOS troubleshooting commands can help to isolate problems with static route?

show ip route show ip interface brief ping

Why would floating static route be configured with administrative distance that is higher than administrative distance of dynamic routing protocol that is running on same router?

to be used as backup route

What are two functions of dynamic routing protocols?

to discover network to maintain routing tables

Network engineer issues show cdp neighbor command on several network devices during process of network documentation. What is the purpose of performing this command?

to obtain information about directly connected Cisco devices

Network administrator configures router by the command ip route 0.0.0.0 0.0.0.0 209.165.200.226. What is the purpose of this command?

to provide route to forward packets for which there is no route in routing table