CCNA IP Routing Practice Test 8 — 15 Questions

Question 1

You are configuring a static route on R1 to the 192.168.50.0/24 network. The next-hop address is 10.1.1.2, but the exit interface is not specified. After entering the command, R1 reports that the route is in the routing table but the next-hop is unreachable. Which command should you use to correct this issue?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

ip route 192.168.50.0 255.255.255.0 GigabitEthernet0/1 10.1.1.2. The correct command includes both the exit interface and the next-hop address. When a static route is configured with only a next-hop address, the router performs a recursive lookup to find the exit interface. If the next-hop is not reachable via another route, the static route is not installed in the forwarding table, even though it appears in the routing table. Specifying the exit interface eliminates the need for recursion and ensures proper installation.

Answer

ip route 192.168.50.0 255.255.255.0 10.1.1.2 1

Answer

ip route 192.168.50.0 255.255.255.0 GigabitEthernet0/1

Answer

ip route 192.168.50.0 255.255.255.0 10.1.1.2

Question 2

A network engineer at a branch office is configuring a Cisco router that connects to the ISP via a single serial link. The engineer wants the router to forward all traffic destined for unknown networks to the ISP's next-hop address 203.0.113.1, but only if the ISP link is reachable via the directly connected interface. Which configuration accomplishes this?

Accepted Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.1. A default static route is configured with the destination network 0.0.0.0 and mask 0.0.0.0, pointing to a next-hop IP address or exit interface. The next-hop 203.0.113.1 is reachable via the directly connected serial link, so the router will use this route for all traffic without a more specific match. This provides a simple and effective default route for the branch office.

Answer

ip route 0.0.0.0 255.255.255.255 203.0.113.1

Answer

ip default-network 203.0.113.0

Answer

ip route 203.0.113.0 255.255.255.0 0.0.0.0

Question 3

You are troubleshooting a routing issue on R1. The routing table shows an OSPF route to 10.10.10.0/24 with an administrative distance of 110 and a static route to the same network with an administrative distance of 130. However, traffic to 10.10.10.5 is being forwarded via the static route. What is the most likely cause?

Accepted Answer

The OSPF route is not installed because the next-hop is unreachable, so the static route is used instead.. The static route is being used because the OSPF route is not installed in the routing table. This typically occurs when the OSPF route's next-hop is unreachable or the OSPF process has not learned the route. Even though the static route has a higher administrative distance, it becomes the active route when no better route exists. The administrative distance only matters when multiple routes to the same destination are present and valid.

Answer

The static route has a lower administrative distance than the OSPF route due to a configuration error.

Answer

The static route is a floating static route that becomes active when the OSPF route is lost.

Answer

The OSPF route is not installed in the routing table because the static route has a lower administrative distance.

Question 4

A router has two static routes to the same destination network 10.1.1.0/24: one with administrative distance 1 and another with administrative distance 200. Both routes point to different next-hop addresses. Which route will be installed in the routing table?

Accepted Answer

The route with administrative distance 1. Administrative distance is a measure of trustworthiness; lower values are preferred. When two static routes point to the same destination, the router compares administrative distances and installs the one with the lower value. The route with distance 1 is the default static route and is chosen. The route with distance 200 is a floating static route that only becomes active if the primary route is lost.

Answer

The route with administrative distance 200

Answer

Both routes will be installed and load-balanced

Answer

Neither route will be installed because of the conflict

Question 5

A network administrator is configuring a static route on a Cisco router. The router needs to forward traffic to the 192.168.10.0/24 network via the next-hop address 10.1.1.2. Which command accomplishes this?

Accepted Answer

ip route 192.168.10.0 255.255.255.0 10.1.1.2. The correct syntax for a static route is ip route destination_network subnet_mask next-hop_address. The command ip route 192.168.10.0 255.255.255.0 10.1.1.2 matches the requirement. Adding an administrative distance is unnecessary, using an exit interface is not what was asked, and a wildcard mask is invalid in this context.

Answer

ip route 192.168.10.0 0.0.0.255 10.1.1.2

Answer

ip route 192.168.10.0 255.255.255.0 Serial0/0/0

Answer

ip route 192.168.10.0 255.255.255.0 10.1.1.2 100

Question 6

You are configuring a static route on a Cisco router to reach 172.16.0.0/16 via the next-hop 10.0.0.1. However, you want to ensure that the route is only used if the next-hop address is reachable through a specific interface, GigabitEthernet0/0. Which command should you use?

Accepted Answer

ip route 172.16.0.0 255.255.0.0 GigabitEthernet0/0 10.0.0.1. A fully specified static route includes both the exit interface and the next-hop address. The correct syntax is 'ip route destination mask exit_interface next_hop'. This binds the route to a specific interface, ensuring the next hop is only considered reachable through that interface. It also eliminates recursive routing table lookups.

Answer

ip route 172.16.0.0 255.255.0.0 GigabitEthernet0/0

Answer

ip route 172.16.0.0 255.255.0.0 10.0.0.1

Answer

ip route 172.16.0.0 255.255.0.0 10.0.0.1 GigabitEthernet0/0

Question 7

You are configuring a static route on R1 to the 192.168.50.0/24 network. The next-hop address is 10.1.1.2, but the exit interface is not specified. After entering the command, R1 reports that the route is in the routing table but the next-hop is unreachable. Which command should you use to correct this issue?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

ip route 172.16.1.0 255.255.255.0 GigabitEthernet0/1. Specifying only the exit interface creates a static route that is considered directly connected. The router keeps this route in the routing table as long as the interface is up, without requiring next-hop reachability. This is ideal when you want the route to persist even if the next-hop becomes unreachable, such as on point-to-point links or when the next-hop is not directly reachable.

Answer

ip route 172.16.1.0 255.255.255.0 10.1.1.2 permanent

Answer

ip route 172.16.1.0 255.255.255.0 GigabitEthernet0/1 10.1.1.2

Answer

ip route 172.16.1.0 255.255.255.0 10.1.1.2

Question 8

A network engineer is troubleshooting a routing issue on a Cisco router. The router has a static route to 192.168.10.0/24 via 10.0.0.1 and an OSPF-learned route to the same network via 10.0.0.2. Both routes are in the routing table. Which route will be used to forward traffic to 192.168.10.50?

Accepted Answer

The static route via 10.0.0.1. Administrative distance is used to select the best route when multiple routing sources provide a route to the same destination. Static routes have a default administrative distance of 1, while OSPF has a default of 110. The lower value is preferred, so the static route is installed in the routing table and used for forwarding. The OSPF route remains in the OSPF database but is not installed in the routing table.

Answer

The OSPF route via 10.0.0.2

Answer

Both routes will be used for load balancing

Answer

The router will randomly choose one route per packet

Question 9

A network engineer is configuring a Cisco router to use a static default route as a backup to a dynamically learned default route from OSPF. Which two statements are true about this configuration? (Choose two.)

Accepted Answer

The static default route must have an administrative distance higher than 110 to act as a floating backup.. To create a floating static default route as a backup to OSPF, you must set the static route's administrative distance higher than OSPF's default of 110. The static route will then be installed only when the OSPF default route is removed. This provides a reliable backup path without interfering with normal OSPF operation.

Answer

The static default route will always be preferred over the OSPF default route because static routes have a lower default administrative distance.

Answer

The static default route must be configured with the same administrative distance as OSPF to ensure load balancing.

Answer

The static default route can be configured using the command 'ip route 0.0.0.0 0.0.0.0 next_hop 250'.

Question 10

A router has two static routes to the same destination network 10.10.10.0/24: one with administrative distance 1 and one with administrative distance 5. Both next hops are reachable. A network engineer wants to ensure that the route with administrative distance 1 is always preferred, but also wants the router to automatically switch to the route with administrative distance 5 if the first route's next hop becomes unreachable. Which statement describes the resulting behavior?

Accepted Answer

The router will install only the route with administrative distance 1, and if its next hop fails, the route with administrative distance 5 will be installed.. Cisco IOS selects the route with the lowest administrative distance for a given destination. When two static routes with different distances exist, only the lower-distance route is installed. If that route's next hop becomes unreachable, the route is removed, and the router then installs the route with the higher distance. This behavior provides a simple backup path without needing floating static route configuration, as the distances themselves determine preference and failover.

Answer

The router will install both routes and load-balance traffic across them.

Answer

The router will install both routes but will use the one with administrative distance 5 only for specific traffic types.

Answer

The router will install only the route with administrative distance 1 and will not use the other route under any circumstances.

Question 11

You are configuring a static route on R1 to the 192.168.50.0/24 network. The next-hop address is 10.1.1.2, but the exit interface is not specified. After entering the command, R1 reports that the route is in the routing table but the next-hop is unreachable. Which command should you use to correct this issue?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

ip route 10.20.30.0 255.255.255.0 GigabitEthernet0/1. To avoid recursive lookups, you must specify the exit interface in the static route configuration. This can be done by specifying only the exit interface or by specifying both the exit interface and the next-hop address. Both methods ensure the router knows the exit interface without performing a recursive lookup. Specifying only the next-hop address always triggers a recursive lookup.

Answer

ip route 10.20.30.0 255.255.255.0 10.1.1.2 1

Answer

ip route 10.20.30.0 255.255.255.0 10.1.1.2 permanent

Answer

ip route 10.20.30.0 255.255.255.0 10.1.1.2

Question 12

A network engineer is configuring a static route on a Cisco router to forward traffic to the 172.16.0.0/16 network. The engineer wants to specify the next-hop IP address as 10.1.1.1 and also assign an administrative distance of 200 to make it a floating static route. Which two commands will correctly accomplish this? (Choose two.)

Accepted Answer

ip route 172.16.0.0 255.255.0.0 10.1.1.1 200. To configure a floating static route, the administrative distance must be set to a value higher than that of the dynamic routing protocol in use. The correct syntax is 'ip route

'. Option A and Option E both follow this syntax and set the distance to 200. Option E additionally uses the optional 'name' keyword, which is valid. The other options either omit the distance, use incorrect syntax, or add the 'permanent' keyword, which is not required for a floating static route.

Answer

ip route 172.16.0.0 255.255.0.0 10.1.1.1

Answer

ip route 172.16.0.0 255.255.0.0 10.1.1.1 200 permanent

Answer

ip route 172.16.0.0 255.255.0.0 10.1.1.1 distance 200

Question 13

A router is configured with a static route to 192.168.100.0/24 pointing to next-hop 10.0.0.2, which is reachable via an Ethernet interface. The network engineer notices that the route is not appearing in the routing table. Which is the most likely reason?

Accepted Answer

The next-hop address 10.0.0.2 is not resolvable through any interface.. A static route with a next-hop IP address is only installed if that next hop is resolvable. This means there must be a route to the next-hop address, typically a connected route on an interface that is up. If the next hop is not resolvable, the static route remains inactive and does not appear in the routing table. The other options are either incorrect or less likely given the scenario details.

Answer

The static route has an administrative distance of 1, which is too low for it to be installed.

Answer

The destination network 192.168.100.0/24 is not present in the routing table of any neighboring router.

Answer

The Ethernet interface connected to 10.0.0.2 is administratively down.

Question 14

You are configuring a Cisco router that connects to an ISP. The ISP provides the IPv4 address 203.0.113.1/30 on the WAN interface GigabitEthernet0/0. You need to configure a static default route that sends all unknown traffic to the ISP next-hop. Which command correctly accomplishes this?

Accepted Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.1. A default static route uses 0.0.0.0/0 as the destination prefix and a next-hop address. On an Ethernet WAN, specifying the next-hop IP is preferred over an exit interface to avoid recursive lookups and ARP overhead. The ip default-gateway command is only for devices with routing disabled.

Answer

ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0

Answer

ip default-gateway 203.0.113.1

Answer

ip route 0.0.0.0 255.255.255.255 203.0.113.1

Question 15

A router learns route 198.51.100.0/24 from OSPF with AD 110 and also has a static route to the same prefix configured with AD 150. Which route is installed?

Accepted Answer

The OSPF route, because 110 is lower than 150. The route with the lower administrative distance is installed. A static route configured with a higher AD becomes a floating static route and remains as a backup until the preferred route disappears.

Answer

The static route, because static routes always win

Answer

Both routes, because administrative distances are different

Answer

Neither route, because the static route is floating