MOD 14 Routing Concepts
19. 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?
100
9. Refer to the exhibit. What is the administrative distance value of the route for router R1 to reach the destination IPv6 address of 2001:DB8:CAFE:4::A?
120
39. Refer to the exhibit. PC A sends a request to Server B. What IPv4 address is used in the destination field in the packet as the packet leaves PC A?
192.168.12.16
15. What address and prefix length is used when configuring an IPv6 default static route?
::/0
20. Refer to the exhibit. Which default static route command would allow R1 to potentially reach all unknown networks on the Internet?
R1(config)# ipv6 route ::/0 G0/1 fe80::2
2. Which three advantages are provided by static routing? (Choose three.)
Static routing does no advertise over the network, thus providing better security. The path a static route uses to send data is known. Static routing typically uses less network bandwidth and fewer CPU operations than dynamic routing does.
14. What are two reasons why an administrator might choose to use static routing rather than dynamic routing? (Choose two.)
Static routing uses less router processing and bandwidth. Static routing is more secure.
9. 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?
the lowest metric
8. What are two functions of a router? (Choose two.)
A router connects multiple IP networks. It determines the best path to send packets.
12. Refer to the graphic. Which command would be used on router A to configure a static route to direct traffic from LAN A that is destined for LAN C?
A(config)# ip route 192.168.4.0 255.255.255.0 192.168.3.2
29. 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?
Change the administrative distance to 120.
6. Which packet-forwarding method does a router use to make switching decisions when it is using a forwarding information base and an adjacency table?
Cisco Express Forwarding
14. Refer to the exhibit. This network has two connections to the ISP, one via router C and one via router B. The serial link between router A and router C supports EIGRP and is the primary link to the Internet. If the primary link fails, the administrator needs a floating static route that avoids recursive route lookups and any potential next-hop issues caused by the multiaccess nature of the Ethernet segment with router B. What should the administrator configure?
Create a fully specified static route pointing to Fa0/0 with an AD of 95.
38. Match the routing table entry to the corresponding function. (Not all options are used.)
Identify how a route was learned = Route Source Identifies the address of the remote network= Destination network Identifies the value assigned to reach a remote network= Metric Identifies the trustworthiness of a route source= administrative distance
40. What does R1 use as the MAC address of the destination when constructing the frame that will go from R1 to Server B?
If the destination MAC address that corresponds to the IPv4 address is not in the ARP cache, R1 sends an ARP request.
6. What is a characteristic of a static route that matches all packets?
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.
15. What is a characteristic of a floating static route?
It is configured with a higher administrative distance than the original dynamic routing protocol has.
8. Which route would be used to forward a packet with a source IP address of 192.168.10.1 and a destination IP address of 10.1.1.1?
O 10.1.1.0/24 [110/65] via 192.168.200.2, 00:01:20, Serial0/1/0
28. Refer to the exhibit. An administrator is attempting to install a default static route on router R1 to reach the Site B network on router R2. After entering the static route command, the route is still not showing up in the routing table of router R1. What is preventing the route from installing in the routing table?
The next hop address is incorrect.
25. Refer to the exhibit. How was the host route 2001:DB8:CAFE:4::1/128 installed in the routing table?
The route was manually entered by an administrator.
27. Refer to the exhibit. A ping from R1 to 10.1.1.2 is successful, but a ping from R1 to any address in the 192.168.2.0 network fails. What is the cause of this problem?
The static route for 192.168.2.0 is incorrectly configured.
5. What happens to a static route entry in a routing table when the outgoing interface associated with that route goes into the down state?
The static route is removed from the routing table.
41. What route would have the lowest administrative distance?
a directly connected network
13. What are two common types of static routes in routing tables? (Choose two)
a static route to a specific network a default static route
4. What is an advantage of using dynamic routing protocols instead of static routing?
ability to actively search for new routes if the current path becomes unavailable
10. Which value in a routing table represents trustworthiness and is used by the router to determine which route to install into the routing table when there are multiple routes toward the same destination?
administrative distance
11. The output of the show ip route command contains the following entry: What value is indicated by the 1 in the [1/0] portion of the output?
administrative distance
5. 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?
administrative distance
What does the 5 at the end of the command signify?
administrative distance
10. 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.)
c L
7. Which type of route would typically be used on a border router so that devices inside the company could access the Internet?
default
12. Which type of static route creates a gateway of last resort?
default static route
13. On which two routers would a default static route be configured? (Choose two.)
edge router connection to the ISP stub router connection to the rest of the corporate or campus network
1. Which feature on a Cisco router permits the forwarding of traffic for which there is no specific route?
gateway of last resort
21. Refer to the exhibit. The network engineer for the company that is shown wants to use the primary ISP connection for all external connectivity. The backup ISP connection is used only if the primary ISP connection fails. Which set of commands would accomplish this goal?
ip route 0.0.0.0 0.0.0.0 s0/0/0 ip route 0.0.0.0 0.0.0.0 s0/1/0 10
7. When would it be more beneficial to use a dynamic routing protocol instead of static routing?
on a network where there is a lot of topology changes
3. What are two functions of dynamic routing protocols? (Choose two.)
to discover the network to maintain routing tables
