CNA 150 | Ch. 2 - Static Routes

STUB

A ______ network is a network that is accessed by a single route, and the router has only one neighbor.

True. If a link-local address is used as the next-hop.

True or False? Unlike with IPv4, there is one situation when using IPv6 where a fully specified static route is required.

show ip interface brief

What command provides a quick status of all interfaces on the router?

D. To reduce the size of the routing table.

Why would a summarized static route be configured on a router? A. To reduce the number of public IP address requires by an organization. B. To provide a better route than a particular routing protocol. C. To provide a default gateway for a router that connects to an ISP. D. To reduce the size of the routing table. E. To reduce the size of the routing protocol update to a neighboring router.

Cisco Express Forwarding (CEF)

_______ provides optimized lookup for efficient packet forwarding by using two main data structures stored in the data plane. This is the default behavior on most platforms running IOS 12.0 or later.

Static

_______ routes are useful for smaller networks with only one path to an outside network.

100

An administrator issues the ipv6 route 2001:db8:acad:1::/32 gigabitethernet0/0 2001:db8:acad:6::1 100 command on a router. What administrative distance is assigned to this route?

ip route 0.0.0.0 0.0.0.0 192.168.10.1 95

Configure a default route using the next-hop address 192.168.10.1 with an AD of 95.

ip route 172.16.1.0 255.255.255.0 192.168.1.2

Configure a static route to the 172.16.1.0/24 network using the next-hop address 192.168.1.2.

Gateway of Last Resort

Creating a default static route creates a ________________________.

point-to-point

For _______________ interfaces, you can use static routes that point to the exit interface or to the next-hop address.

By configuring the AD higher than it's corresponding primary route.

How do you ensure that the floating route is only used when the primary route is unavailable?

Fully specified

It is recommended that when the exit interface is an Ethernet network, that a ____________ route is used.

default

A ______ route is a route that matches all packets and is used by the router if a packet does not match any other, more specific route in the routing table.

host

A ______ route is an IPv4 address with a 32-bit mask or an IPv6 address with a 128-bit mask.

default

A __________ route does not require any left-most bits to match between the route and the destination IPv4 address.

B. A static route to the 192.168.10.0/24 network

Consider the following command: ip route 192.168.10.0 255.255.255.0 10.10.10.2 5 Which route would have to go down in order for this static route to to appear in the routing table? A. A default route B. A static route to the 192.168.10.0/24 network C. An OSPF-learned route to the 192.168.10.0/24 network D. An EIGRP-learned route to the 192.168.10.0/24 network

False. Although common, CEF makes this practice unnecessary.

True or False? Static routes that use only an exit interface on point-to-point networks are recommend when using CEF.

show cdp neighbors

What command provides a list of directly connected Cisco devices?

True

True or False? For multipoint/broadcast interfaces, it is more suitable to use static routes that point to a next-hop address.

True.

True or False? In a comparison of dynamic and static routes, the advantages of one method are the disadvantages of the other.

True.

True or False? With the use of CEF, a fully specified static route is no longer necessary. A static route using a next-hop address should be used instead.

B. Static routing uses fewer router resources than dynamic routing. E. Static routing is more secure because it does not advertise over the network.

What are two advantages of static routing over dynamic routing? (Choose two.) A. Static routing requires very little knowledge of the network for correct implementation. B. Static routing uses fewer router resources than dynamic routing. C. Static routing is relatively easy to configure for large networks. D. Static routing scales well with expanding networks. E. Static routing is more secure because it does not advertise over the network.

D. encapsulates the packet into a frame for the WAN link and forwards the packet out the S0/1/0 interfac

A network administrator enters the following command into Router1: ip route 192.168.0.0 255.255.255.0 S0/1/0. Router1 then receives a packet that is destined for 192.168.0.22/24. After finding the recently configured static route in the routing table, what does Router1 do next to process the packet? A. drops the packet because the destination host is not listed in the routing table B. looks up the MAC address of the S0/1/0 interface to determine the destination MAC address of the new frame C. performs a recursive lookup for the IP address of the S0/1/0 interface before forwarding the packet D. encapsulates the packet into a frame for the WAN link and forwards the packet out the S0/1/0 interface.

show ip interface brief

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

ping show ip interface brief

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

ip route 172.16.1.0 255.255.255.0 s0/0/1 192.168.1.2

Configure a static route to the 172.16.1.0/24 network using the exit interface s0/0/1 and next-hop address 192.168.1.2.

B. Manually shut down the router interface used as a primary route.

Consider the following command: ip route 192.168.10.0 255.255.255.0 10.10.10.2 5 How would an administrator test this configuration? A. Ping any valid address on the 192.168.10.0/24 network. B. Manually shut down the router interface used as a primary route. C. Ping from the 192.168.10.0 network to the 10.10.10.2 address. D. Delete the default gateway route on the router.

C. A static route to the 192.168.10.0/24 network

Consider the following command: ip route 192.168.10.0 255.255.255.0 10.10.10.2 5 Which route would have to go down in order for this static route to appear in the routing table? A. An OSPF-learned route to the 192.168.10.0/24 network B. An EIGRP-learned route to the 192.168.10.0/24 network C. A static route to the 192.168.10.0/24 network D. A default route

91 or more EIGRP learned routes have an AD of 90

If you configured a floating static route as a backup for an EIGRP-learned route, what AD would you need to set for it to work properly?

show running-config | section ip route

Issue the command to display the "ip route" configurations in the running-config using the section filter.

ip route

Static routes are configured using the ________ global configuration command.

ipv6 route

Static routes for IPv6 are configured using the _________ global configuration command.

ipv6 unicast-routing

The ____________ global configuration command must be configured to enable a router to forward IPv6 packets.

::/0

The command syntax for a default static route is similar to any other static route, except that the ipv6-prefix/prefix-length is ______, which matches all routes.

A. S 172.16.1.0 [1/0] via 172.16.2.2

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

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

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 A. HQ(config)# interface serial 0/1/0 HQ(config-if)# shutdown HQ(config-if)# end HQ# show ip route B. HQ# traceroute 128.107.0.99 C. HQ# show ip interface brief D. HQ# ping 128.107.0.99 HQ# ping 64.100.0.5 E. HQ# show ip route

Fully specified

What form of a static route is used when the exit interface is a multi-access interface and it is necessary to explicitly identify the next hop?

Destination Network-address Destination subnet-mask Next-hop IP exit-interface -

What four pieces of information are required to configure a fully specified static route?

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

What happens to a static route entry in a routing table when the outgoing interface associated with that route goes into the down state? A. The router polls neighbors for a replacement route. B. The router automatically redirects the static route to use another interface. C. The static route is removed from the routing table. D. The static route remains in the table because it was defined as static.

C. It identifies the gateway IP address to which the router sends all IP packets for which it does not have a learned or static route.

What is a characteristic of a default static route? ​ A. It backs up a route already discovered by a dynamic routing protocol. B. It uses a single network address to send multiple static routes to one destination address. C. It identifies the gateway IP address to which the router sends all IP packets for which it does not have a learned or static route. D. It is configured with a higher administrative distance than is the original dynamic routing protocol.

1

What is the AD for a static route?

ipv6 route ::/0 [ipv6 address | exit-interface]

What is the basic command syntax of a default IPv6 static route?

D. ip route 209.165.200.228 255.255.255.248 10.0.0.1 120

What is the correct syntax of a floating static route? A. ip route 0.0.0.0 0.0.0.0 serial 0/0/0 B. ip route 172.16.0.0 255.248.0.0 10.0.0.1 C. ip route 209.165.200.228 255.255.255.248 serial 0/0/0 D. ip route 209.165.200.228 255.255.255.248 10.0.0.1 120

distance - Used to create a floating static route

What is the optional parameter that can be used while configuring a static route and what does it do?

0.0.0.0 0.0.0.0

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

Forwarding Information Base (FIB)- copy of routing table Adjacency table - Includes layer 2 addressing info

What two main data structures does CEF use?

B. the IP address of the next-hop neighbor C. the interface ID exit interface

What two pieces of information are needed in a fully specified static route to eliminate recursive lookups? (Choose two.) A. the administrative distance for the destination network B. the IP address of the next-hop neighbor C. the interface ID exit interface D. the interface ID of the next-hop neighbor E. the IP address of the exit interface

Destination networks must be contiguous and capable pf being summarized in a single network address. All summarized routes must use the same exit interface or hop IP address.

What two requirements must first be met for multiple static routes to be summarized into a single static route?

Recursive or Next-hop static route

What type of routes next hop and destination network are covered by another learned route in the Routing Information Base (RIB)?

Default

What type of static route is commonly used with edge routers to connect to the ISP network?

Standard

What type of static route is useful when connecting to stub networks?

90

What's the AD for EIGRP?

100

What's the AD for IGRP?

115

What's the AD for IS-IS?

110

What's the AD for OSPF?

120

What's the AD for RIP?

recursive lookup

When the router performs multiple lookups in the routing table before forwarding a packet, it is performing a process known as a ___________________. This process consumes router resources, and it should be avoided when possible.

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

Which IPv6 static route would serve as a backup route to a dynamic route learned through OSPF? A. Router1(config)# ipv6 route 2001:db8:acad:1::/32 2001:db8:acad:6::2 100 B. Router1(config)# ipv6 route 2001:db8:acad:1::/32 2001:db8:acad:6::100 C. Router1(config)# ipv6 route 2001:db8:acad:1::/32 2001:db8:acad:6::2 200 D. Router1(config)# ipv6 route 2001:db8:acad:1::/32 gigabitethernet0/0 2001:db8:acad:6::100 100

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

Which command would create a valid IPv6 default route? A. ipv6 route ::/0 fe80::1 B. ipv6 route 2001:db8:acad:1::/64 ::1 C. ipv6 route ::/0 2001:db8:acad:2::a D. ipv6 route ::/128 2001:db8:acad:1::1

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

Which static route shows a recursive IPv6 static route? A. ipv6 route 0::/0 S0/0/0 B. ipv6 route 0::/0 S0/0/0 254 C. ipv6 route 2001:db8:cafe:1::/56 S0/0/0 D. ipv6 route 2001:db8:cafe:1::/56 2001:db8:1000:10::1 E. ipv6 route 2001:db8:cafe:1::/56 S0/0/0 2001:db8:1000:10::1

B. Show ip interface brief E. ping F. show ip route

Which three IOS troubleshooting commands can help to isolate problems with a static route? (Choose three.) A. show version B. show ip interface brief C. show arp D. tracert E. ping F. show ip route

directly connected

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

Fully specified

Which type of static route that is configured on a router uses the next-hop IP address and exit interface?