Module 16 Pre-Assessment

Refer to the exhibit. The small company shown uses static routing. Users on the R2 LAN have reported a problem with connectivity. What is the issue?

• R2 needs a static route to the R1 LANs.

• R1 and R2 must use a dynamic routing protocol.

• R1 needs a default route to R2.

• R1 needs a static route to the R2 LAN.

• R2 needs a static route to the Internet.

Answer explanation

R1 has a default route to the Internet. R2 has a default route to R1. R1 is missing a static route for the 10.0.60.0 network. Any traffic that reached R1 and is destined for 10.0.60.0/24 will be routed to the ISP.

Refer to the exhibit. An administrator is attempting to install an IPv6 static route on router R1 to reach the network attached to router R2. After the static route command is entered, connectivity to the network is still failing. What error has been made in the static route configuration?

• The network prefix is incorrect.

• The destination network is incorrect.

• The interface is incorrect.

• The next hop address is incorrect.

Answer explanation

In this example the interface in the static route is incorrect. The interface should be the exit interface on R1, which is s0/0/0.

Refer to the exhibit. How was the host route 2001:DB8:CAFE:4::1/128 installed in the routing table?

• The route was automatically installed when an IP address was configured on an active interface.

• The route was dynamically learned from another router.

• The route was manually entered by an administrator.

• The route was dynamically created by router R1.

Answer explanation

A host route is an IPv6 route with a 128-bit mask. A host route can be installed in a routing table automatically when an IP address is configured on a router interface or manually if a static route is created.

Refer to the exhibit. HostA is attempting to contact ServerB. Which two statements correctly describe the addressing that HostA will generate in the process? (Choose two.)

• A packet with the destination IP address of RouterB.

• A frame with the destination MAC address of SwitchA.

• A packet with the destination IP address of RouterA.

• A frame with the destination MAC address of RouterA.

• A packet with the destination IP address of ServerB.

Answer explanation

In order to send data to ServerB, HostA will generate a packet that contains the IP address of the destination device on the remote network and a frame that contains the MAC address of the default gateway device on the local network.

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?

• There is no gateway of last resort at R1.

• The serial interface between the two routers is down.

• A default route is not configured on R1.

• The static route for 192.168.2.0 is incorrectly configured.

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 netmask is incorrect.

• The destination network is incorrect.

• The exit interface is missing.

• The next hop address is incorrect.

Answer explanation

The next hop address is incorrect. From R1 the next hop address should be that of the serial interface of R2, 209.165.202.130.

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?

• Add the next hop neighbor address of 198.51.0.8.

• Change the administrative distance to 1.

• Change the destination network to 198.51.0.5.

• Change the administrative distance to 120.

Answer explanation

The problem with the current floating static route is that the administrative distance is set too low. The administrative distance will need to be higher than that of OSPF, which is 110, so that the router will only use the OSPF link when it is up.

Refer to the exhibit. Which static route would an IT technician enter to create a backup route to the 172.16.1.0 network that is only used if the primary RIP learned route fails?

• ip route 172.16.1.0 255.255.255.0 s0/0/0 91

• ip route 172.16.1.0 255.255.255.0 s0/0/0

• ip route 172.16.1.0 255.255.255.0 s0/0/0 111

• ip route 172.16.1.0 255.255.255.0 s0/0/0 121

Answer explanation

A backup static route is called a floating static route. A floating static route has an administrative distance greater than the administrative distance of another static route or dynamic route.