CCNA IP Routing Practice Test 5 — 15 Questions

Question 1

Drag and drop the following OSPFv2 neighbor state transitions into the correct order, starting with the Down state and ending with the ExStart state.

Accepted Answer

Init. OSPF neighbor states progress in order: Down, Init, 2-Way, ExStart, Exchange, Loading, Full. Among the options provided (Down, Init, 2-Way, ExStart), the correct order is Down → Init → 2-Way → ExStart.

Question 2

Drag and drop the following steps into the correct order to configure single-area OSPFv2 on a router and verify the neighbor state transitions from Down to Full.

Accepted Answer

1. Enter global configuration mode. 2. Enable OSPF with router ospf [process-id]. 3. Configure network statements with network [network] [wildcard-mask] area [area-id]. 4. Clear OSPF process with clear ip ospf process. 5. Verify neighbor states with show ip ospf neighbor.. Only option A presents the correct sequence: first enter global configuration mode, then enable the OSPF process with router ospf, then configure network statements on the OSPF process, then clear the OSPF process to force adjacency re-establishment and neighbor state transitions from Down to Full, and finally verify with show ip ospf neighbor. Option B incorrectly places verification before clearing, so the neighbor could still be in a different state. Option C attempts to configure networks before enabling OSPF, which is not possible. Option D clears the OSPF process before configuring networks, which would remove any existing configurations before they are applied. Note: Clearing the OSPF process is a disruptive action that resets all adjacencies; in production, use 'clear ip ospf process' only when necessary. For normal configuration verification, 'show ip ospf neighbor' is sufficient without clearing.

Question 3

Drag and drop the following OSPFv2 DR/BDR election steps into the correct order for a multiaccess network where a new router is added after the DR and BDR have already been elected.

Accepted Answer

The new router sends Hello packets, becomes the new DR after election, and then forms adjacencies with all other routers.. Options B, C, and D are all correct. They describe the sequence of events when a new router joins a multiaccess network with an existing DR and BDR. The new router sends Hello packets (B), then becomes the new DR (B) and later the new BDR (C) after an election, then enters ExStart state with both and forms full adjacencies (D). Option A is incorrect because a router with priority 0 never becomes DR/BDR and must form full adjacency with both DR and BDR, not just the DR.

Answer

The new router sends Hello packets with priority 0, remains in 2-Way state with DR and BDR, then forms full adjacency with the DR.

Question 4

Which TWO statements correctly describe OSPFv2 DR/BDR election behavior in a multi-access network?

Accepted Answer

The router with the highest OSPF interface priority is elected as the DR.. Options A and C are correct: OSPFv2 DR election first compares interface priority (highest wins), and if equal, the highest Router ID (RID) wins. Option B is incorrect because a priority of 0 prevents a router from ever becoming DR or BDR. Option D is incorrect because the election is non-preemptive; a router with higher priority won't take over until the current DR/BDR fails. Option E describes adjacency formation (DROTHERs only form full adjacencies with DR and BDR) rather than election behavior, so it is not a correct answer to the question.

Answer

A router with OSPF priority 0 can become the BDR if no other router has a higher priority.

Answer

The DR election is preemptive; a new router with a higher priority will immediately take over as DR.

Answer

All routers on a multi-access network form full adjacencies with the DR and BDR only.

Question 5

Drag and drop the OSPFv2 neighbor states on the left to the correct descriptions on the right.

Accepted Answer

Down: No Hello packets received from the neighbor.. OSPF neighbor states progress: Down (no Hello), Init (Hello seen but Router ID not in Hello), 2-Way (bidirectional communication), ExStart (master/slave election and first DD packets). All listed descriptions are accurate for their respective states.

Question 6

Drag and drop the following steps into the correct order to configure OSPFv3 for IPv6 on a Cisco IOS-XE router and verify the OSPFv3 neighbor adjacency and route installation.

Accepted Answer

Enable IPv6 routing globally. The correct sequence ensures IPv6 routing is enabled first, then the OSPFv3 process is created, applied to the interface, and finally verified for adjacency and route installation.

Question 7

Drag and drop the following steps into the correct order to configure OSPFv3 for IPv6 on a Cisco IOS-XE router, including enabling IPv6 routing, setting up the OSPFv3 process, enabling it on an interface, and verifying the adjacency and routes.

Accepted Answer

1. Enable IPv6 routing globally with 'ipv6 unicast-routing'. The correct order to configure OSPFv3 for IPv6 on a Cisco IOS-XE router is as follows: Step 1: Enable IPv6 routing globally with 'ipv6 unicast-routing'. Step 2: Configure the OSPFv3 process with 'ipv6 router ospf ' and set the router ID. Step 3: Enable OSPFv3 on the interface with 'ipv6 ospf area '. Step 4: Verify OSPFv3 adjacency and routes with 'show ipv6 ospf neighbor' and 'show ipv6 route ospf'. This logical workflow ensures that IPv6 routing is enabled first, then the OSPFv3 process is created and configured, applied to an interface, and finally verified.

Question 8

Drag and drop the following steps into the correct order to explicitly configure OSPFv3 for IPv6 on a Cisco IOS-XE router, assuming no OSPFv3 routing process exists beforehand.

Accepted Answer

Enable IPv6 unicast routing globally. To configure OSPFv3, first globally enable IPv6 unicast routing (A). Next, create the OSPFv3 routing process (C) so that it is defined before interfaces try to use it. Then, configure OSPFv3 on the relevant interfaces (B) to activate routing. Finally, verify the OSPFv3 adjacency (D) to confirm neighbors are formed. This sequence avoids automatic process creation and ensures all steps are explicitly controlled.

Question 9

Drag and drop the following steps into the correct order to configure HSRP version 2 on a pair of routers, set the active router via priority and preempt, then verify the election and failover process.

Accepted Answer

1. Configure interface with 'standby version 2' on both routers. 2. Configure virtual IP with 'standby ip '. 3. Set priority on active router with 'standby priority '. 4. Enable preempt with 'standby preempt'. 5. Verify with 'show standby' and test failover.. The correct configuration order for HSRP version 2 requires: first configure HSRP version 2 on both routers to ensure consistent protocol version. Then configure the virtual IP address (the HSRP group must have a virtual IP before priority and preempt can be set). Next, set priority on the desired active router to make it preferred. Finally, enable preempt so that the higher-priority router can take over after a failure. Option A follows this exact sequence. Options B, C, and D are incorrect because they place priority or preempt before the virtual IP, which would cause configuration errors (the HSRP group does not yet have a virtual IP) or misorder the steps.

Answer

1. Configure virtual IP with 'standby ip '. 2. Enable preempt with 'standby preempt'. 3. Set priority on active router with 'standby priority '. 4. Configure interface with 'standby version 2' on both routers. 5. Verify with 'show standby' and test failover.

Answer

1. Set priority on active router with 'standby priority '. 2. Enable preempt with 'standby preempt'. 3. Configure interface with 'standby version 2' on both routers. 4. Configure virtual IP with 'standby ip '. 5. Verify with 'show standby' and test failover.

Answer

1. Enable preempt with 'standby preempt'. 2. Set priority on active router with 'standby priority '. 3. Configure virtual IP with 'standby ip '. 4. Configure interface with 'standby version 2' on both routers. 5. Verify with 'show standby' and test failover.

Question 10

Which TWO statements are true regarding HSRP active/standby election, priority, and preemption?

Accepted Answer

The router with the highest priority becomes the active router.. Option A is correct because HSRP elects the active router based on the highest configured priority value in the standby group (default priority is 100), with the highest IP address used only as a tiebreaker when priorities are equal. Option E is correct because preemption, when enabled with the standby 1 preempt command, allows a router with a higher priority to seize the active role from the current active router that has a lower priority, rather than waiting for it to fail. Option B is wrong because the lowest IP address is not the election criterion; the highest IP address only breaks ties between equal priorities. Option C is wrong because HSRP priority ranges from 0 to 255, not 0 to 100, with 100 being the default rather than the maximum. Option D is wrong because preemption is disabled by default on HSRP interfaces and must be explicitly configured. Option F is wrong because a priority of 0 does not mean the router will never become active; it simply makes the router least likely to be elected, and it can still become active if it is the only candidate or all other routers have priority 0.

Answer

The router with the lowest IP address in the standby group becomes the active router.

Answer

HSRP priority can be configured from 0 to 100, with 100 being the highest.

Answer

Preemption is enabled by default on all HSRP interfaces.

Answer

The standby router uses a priority of 0 to indicate it will never become active.

Question 11

Which FHRP is an open standard protocol?

Accepted Answer

VRRP. VRRP (Virtual Router Redundancy Protocol) is an open standard (RFC 5798) that provides first-hop redundancy. HSRP and GLBP are Cisco proprietary, and IRDP is a router discovery protocol, not a true FHRP.

Answer

HSRP

Answer

GLBP

Answer

IRDP

Question 12

Drag and drop the following steps into the correct order to describe the routing table lookup process when a router receives a packet destined for 192.168.1.100, from destination IP match to forwarding decision.

Accepted Answer

Match destination IP to routing table entries. The correct order for the routing table lookup process when a router receives a packet destined for 192.168.1.100 is: first, match the destination IP to routing table entries (A); second, perform longest prefix match (B); third, determine next-hop IP address (C); fourth, resolve Layer 2 address (D). This sequence ensures the router finds the most specific route, identifies the next-hop, and obtains the MAC address for forwarding.

Question 13

You are connected to R1. Configure IPv4 and IPv6 static routes so that R1 can reach the loopback networks on R2 (192.0.2.0/24 and 2001:db8:1::/32) via G0/0. Also, configure a floating static default route via G0/1 (next-hop 203.0.113.2) with an administrative distance of 200 so that it is only used if the directly connected default route fails. The current configuration has a recursive routing failure for the IPv6 route and a missing default route.

Accepted Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.2 200
ipv6 route 2001:db8:1::/32 GigabitEthernet0/0. The IPv6 static route uses a next-hop address (2001:db8:0:1::2) that is not directly connected; the router will attempt recursive lookup but fails because there is no route to that subnet. The fix is to use the exit interface (GigabitEthernet0/0) instead. The IPv4 default route is missing; add it with AD 200 to make it a floating static default route. The task did not require a connected default route, so the floating static is the only default.

Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.2 200
ipv6 route 2001:db8:1::/32 2001:db8:0:1::2

Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.2
ipv6 route 2001:db8:1::/32 GigabitEthernet0/0

Answer

ip route 0.0.0.0 0.0.0.0 203.0.113.2 200
ipv6 route 2001:db8:1::/32 2001:db8:0:1::2 200

Question 14

You are connected to R1. Configure IPv4 and IPv6 static routes so that R1 can reach the loopback networks on R2 and R3 (203.0.113.0/24 and 2001:db8:1::/48) with proper failover. Ensure that the primary link (G0/0 to R2) is preferred over the backup link (G0/1 to R3) using a floating static route with an appropriate administrative distance. Additionally, configure a default route on R1 for IPv4 and IPv6 so that traffic to unknown destinations is forwarded via the primary link. Troubleshoot the existing configuration to identify and fix a recursive routing failure caused by a wrong next-hop address in one of the static routes.

Accepted Answer

The recursive routing failure is caused by an incorrect next-hop address. Correct the static route to use the reachable next-hop IP of R2 on the primary link: `ip route 203.0.113.0 255.255.255.0 10.0.0.2`.. A recursive static route fails when the next-hop IP has no reachable route in the routing table. The correct fix is to change the next-hop to an IP that is reachable (e.g., the neighbor's connected IP) or add a route to the next-hop network. In this case, the wrong next-hop address must be replaced with the correct next-hop on the directly connected link. The valid command is `ip route 203.0.113.0 255.255.255.0 10.0.0.2` (R2's reachable IP). Do not simply add an exit interface to an incorrect next-hop; fully specifying the route does not make an unreachable next-hop valid.

Answer

The floating static route for IPv4 should have an administrative distance of 1 to ensure it is preferred over the primary route.

Answer

The IPv6 static route to 2001:db8:1::/48 should use a next-hop of 2001:db8:0:1::1 (R1's own interface) to ensure reachability.

Answer

The default route for IPv4 should be configured with an administrative distance of 200 to match the floating static route.

Question 15

You are connected to R1. Configure OSPFv2 on R1 and R2 so that they form a full adjacency and can exchange routes. Currently, the adjacency is stuck in EXSTART state. Identify and fix the issue, then verify the adjacency becomes FULL.

Accepted Answer

On R1, configure 'ip ospf hello-interval 5' and 'ip ospf dead-interval 20' under interface GigabitEthernet0/0.. OSPF adjacency states progress through Down, Init, 2-Way, ExStart, Exchange, Loading, Full. A mismatch in hello/dead intervals causes Hello packets to be ignored, preventing the neighbor from reaching even 2-Way. Being stuck in EXSTART means the routers have already negotiated 2-Way and are exchanging DBD packets; this is commonly caused by MTU mismatch or network type mismatch. Therefore, changing timers is not the solution. The proper fix would be to adjust the MTU or use 'ip ospf mtu-ignore' on one of the interfaces, which is not among the provided options.

Answer

On R1, configure 'ip ospf network point-to-point' under interface GigabitEthernet0/0.

Answer

On R2, configure 'ip ospf hello-interval 10' and 'ip ospf dead-interval 40' under interface GigabitEthernet0/0.

Answer

On R1, configure 'ip ospf dead-interval 40' under interface GigabitEthernet0/0.