CCNA IP Routing Practice Test 9 — 15 Questions

Question 1

A router output shows this neighbor state:

Neighbor ID 10.1.1.1   State FULL/DR   Address 192.168.12.1

What does the FULL/DR state indicate?

Accepted Answer

The neighbor relationship is complete and the neighbor is the DR on that segment. FULL means the OSPF adjacency is fully formed. The /DR suffix indicates that the listed neighbor is the Designated Router for that multiaccess segment.

Answer

The local router is the DR and adjacency formation has failed

Answer

The routers are exchanging only link-state requests

Answer

The neighbor has been learned through BGP redistribution

Question 2

A router learns 10.10.10.0/24 from OSPF and EIGRP at the same time. OSPF reports a metric of 20, and EIGRP reports a metric of 30720. Which route is installed in the routing table by default?

Accepted Answer

The EIGRP route, because its administrative distance is lower. When the same prefix is learned from different routing protocols, the router compares administrative distance first. EIGRP internal routes use AD 90, while OSPF uses AD 110, so the EIGRP route is preferred.

Answer

The OSPF route, because 20 is lower than 30720

Answer

Both routes, because they point to the same prefix

Answer

Neither route, because the metrics are not comparable

Question 3

A router shows this output:

R1#show ip ospf neighbor
Neighbor ID     Pri   State           Dead Time   Address         Interface
10.1.1.2          1   FULL/DR         00:00:34    192.168.12.2    GigabitEthernet0/0
10.1.1.3          1   2WAY/DROTHER    00:00:39    192.168.12.3    GigabitEthernet0/0

Which statement is correct?

Accepted Answer

This can be normal on a broadcast segment where DROTHER routers remain in 2-Way. On broadcast OSPF networks, full adjacency is typically formed with the DR and BDR. DROTHER routers can remain in the 2-Way state with one another and still be operating normally.

Answer

R1 has failed to form adjacency with 10.1.1.3

Answer

R1 has a duplicate router ID with 10.1.1.3

Answer

The interface is passive

Question 4

Which command correctly configures an IPv6 default route using next-hop address 2001:db8:1::1?

Accepted Answer

ipv6 route ::/0 2001:db8:1::1. The correct IPv6 default route uses the prefix ::/0 with the command 'ipv6 route ::/0'. Option B is wrong because 'ip route' is used for IPv4 routes, not IPv6. Option C uses 'ipv6 default-route', which is not a valid Cisco IOS command. Option D sets the management default gateway for IPv4 only and does not insert a route into the IPv6 routing table.

Answer

ip route :: 2001:db8:1::1

Answer

ipv6 default-route 2001:db8:1::1

Answer

ip default-gateway 2001:db8:1::1

Question 5

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 6

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 7

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 8

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 9

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 10

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 11

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 12

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 13

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 14

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 15

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