CCNA IP Routing Practice Test 8 — 15 Questions

Question 1

A routing table entry begins with the code C. What does that code indicate?

Accepted Answer

A connected network. In Cisco routing table output, C indicates a directly connected network. These routes are installed when an interface is up and has an address in that subnet.

Answer

A route learned through EIGRP

Answer

A candidate default route

Answer

A static route to a classful network

Question 2

What problem is HSRP designed to solve?

Accepted Answer

Loss of the default gateway if one router fails. HSRP provides a virtual default gateway so hosts continue forwarding traffic even if one physical gateway router fails.

Answer

Layer 2 switching loops

Answer

Duplicate MAC addresses on trunks

Answer

Wireless interference

Question 3

Which Cisco IOS command configures a default static route pointing to next hop 203.0.113.1?

Accepted Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.1. A default static route uses the all-zero network and mask, followed by the next-hop IP address or exit interface.

Answer

ip default-gateway 203.0.113.1

Answer

default-information originate 203.0.113.1

Answer

route add 0.0.0.0 203.0.113.1

Question 4

Why is RIP rarely chosen for large modern enterprise networks?

Accepted Answer

It scales poorly due to slow convergence and hop-count limitations. RIP is simple but has important scalability limits, including a maximum metric of 15 and relatively slow convergence compared with more modern protocols such as OSPF and EIGRP.

Answer

It does not support IPv4

Answer

It cannot run on routers and only works on switches

Answer

It requires link-state advertisements

Question 5

What metric does RIP use to choose the best path?

Accepted Answer

Hop count. RIP uses hop count as its metric. Lower hop count paths are preferred, up to the protocol maximum of 15 usable hops.

Answer

Bandwidth

Answer

Cost

Answer

Delay

Question 6

A router learns the same prefix from both OSPF and EIGRP. Which route is installed by default?

Accepted Answer

The EIGRP route because it has the lower administrative distance. When identical prefixes are learned from different routing protocols, the router compares administrative distance first. EIGRP internal routes use AD 90, while OSPF uses AD 110.

Answer

The OSPF route because OSPF is link-state

Answer

The route with the lower metric value regardless of protocol

Answer

Both routes are always installed

Question 7

Which static route on R1 sends all unknown IPv4 destinations to next-hop address 192.0.2.1?

Accepted Answer

ip route 0.0.0.0 0.0.0.0 192.0.2.1. A quad-zero route is the IPv4 default route. It matches destinations that do not have a more specific entry in the routing table.

Answer

ip route 0.0.0.0 255.255.255.255 192.0.2.1

Answer

ip route 255.255.255.255 0.0.0.0 192.0.2.1

Answer

ip default-gateway 192.0.2.1

Question 8

Which summary route best represents these four networks?
10.20.0.0/24
10.20.1.0/24
10.20.2.0/24
10.20.3.0/24

Accepted Answer

10.20.0.0/22. Four contiguous /24 networks starting at 10.20.0.0 summarize cleanly into 10.20.0.0/22. That block covers 10.20.0.0 through 10.20.3.255.

Answer

10.20.0.0/23

Answer

10.20.0.0/24

Answer

10.20.0.0/21

Question 9

An engineer wants a static route to be used only if the OSPF route to the same network disappears. What should be configured?

Accepted Answer

A static route with higher administrative distance than OSPF. A floating static route is given a higher administrative distance than the preferred dynamic route so it stays out of the routing table unless the dynamic route is lost.

Answer

A static route with lower administrative distance than OSPF

Answer

A second OSPF route with a lower metric

Answer

A default route with no next hop

Question 10

What problem do first-hop redundancy protocols such as HSRP solve?

Accepted Answer

They provide a backup default gateway for end hosts. First-hop redundancy protocols allow hosts to use a virtual default gateway that can remain available even if one physical router fails.

Answer

They prevent duplicate MAC addresses on a LAN

Answer

They replace spanning tree on switched networks

Answer

They encrypt traffic between users and the default gateway

Question 11

A router has routes for 10.10.0.0/16, 10.10.20.0/24, and a default route. Which route is used for destination 10.10.20.55?

Accepted Answer

The 10.10.20.0/24 route. The destination matches multiple routes, but the /24 is the most specific match and wins by longest prefix match.

Answer

The 10.10.0.0/16 route

Answer

The default route

Answer

The router load-balances across all matching routes

Question 12

Two OSPF routers connected over Ethernet fail to become neighbors. Their interfaces are up/up and in the same IPv4 subnet. One router uses area 0 and the other uses area 1 on the connecting interfaces. What is the most likely cause?

Accepted Answer

Mismatched OSPF areas on the shared link. OSPF neighbors on the same link must agree on key parameters, including the area assigned to that interface. A mismatch prevents the adjacency from forming.

Answer

Mismatched OSPF process IDs

Answer

Missing default routes

Answer

Different router IDs

Question 13

A static route is configured as 198.51.100.0/24 via 192.0.2.9, but the connected network to the next hop goes down. What happens to the static route in the routing table?

Accepted Answer

It is removed because the recursive next hop is no longer reachable.. If the outgoing interface or connected path to the next hop becomes unreachable, the router cannot resolve the recursive next hop and the route is removed from the table.

Answer

It remains permanently because static routes never disappear.

Answer

It changes automatically into a default route.

Answer

It becomes an OSPF external route.

Question 14

Which two statements about OSPF neighbor requirements on a shared Ethernet segment are correct? (Choose two.)

Accepted Answer

They must be in the same OSPF area on that link.. Neighbors must agree on key parameters such as area ID and subnet, and they exchange Hello packets on the segment.

Answer

They must have identical router IDs.

Answer

They must use the same process ID number on both routers.

Question 15

Two OSPF routers connected on an Ethernet link remain in the INIT state. Which issue is the most likely cause?

Accepted Answer

The routers cannot exchange Hellos bidirectionally on the segment. INIT means a router is seeing Hellos from its neighbor but does not see its own router ID in the neighbor field of received Hellos. A common cause is one-way communication or a mismatched multicast/adjacency problem, often at Layer 2.

Answer

The routers have identical router IDs

Answer

The routers have already reached FULL and are waiting to install routes

Answer

The routers are using the same OSPF process ID