CCNA IP Routing Practice Test 16 — 15 Questions

Question 1

Drag and drop the route types on the left to the correct administrative distance and use case descriptions on the right.

Accepted Answer

Connected routes: AD 0, directly connected networks. Floating static routes do not have a fixed administrative distance; they are manually configured with an AD higher than the primary dynamic routing protocol's AD (e.g., higher than OSPF's 110 or EIGRP's 90) to serve as backup. Using AD 5 would make the route preferred over most dynamic protocols, defeating its backup purpose. The other pairings are correct: static and connected routes have AD 0/1, OSPF has AD 110, and a default route is a static route with AD 1 for unknown destinations.

Answer

Static routes: AD 1, manually configured by an administrator

Answer

EIGRP internal routes: AD 90, used for routing within the same autonomous system

Answer

OSPF routes: AD 110, used for routing within the same autonomous system

Question 2

Drag and drop the following steps into the correct order to configure a single-area OSPFv2 network on two Cisco routers (R1 and R2) and observe the neighbor state transitions from Down to Full.

Accepted Answer

Configure OSPF process and router-id on R1, then add the network; repeat on R2; ensure interfaces are up; finally verify neighbor states.. First configure OSPF process and router-id on R1, then add the network; repeat on R2; ensure interfaces are up; finally verify neighbor states to see the full transition sequence.

Answer

Configure OSPF process and router-id on R1, then ensure interfaces are up; repeat on R2; add the network; finally verify neighbor states.

Answer

Ensure interfaces are up on both routers, then configure OSPF process and router-id on R1; add the network; repeat on R2; finally verify neighbor states.

Answer

Configure OSPF process and router-id on R1, then add the network; ensure interfaces are up; repeat on R2; finally verify neighbor states.

Question 3

Drag and drop the following OSPFv2 neighbor state transitions into the correct order, starting from the initial state after an adjacency is attempted and ending with the fully adjacent state.

Accepted Answer

Down. OSPF neighbor states progress from Down to Init, then 2-Way, ExStart, Exchange, and finally Full (not listed).

Answer

Init

Answer

2-Way

Answer

ExStart

Question 4

Drag and drop the following OSPFv2 neighbor state transitions into the correct order, starting from the initial Down state on a broadcast or point-to-point network (non-NBMA).

Accepted Answer

Down, Init, 2-Way, ExStart, Exchange. The standard OSPF neighbor state machine on broadcast and point-to-point networks proceeds: Down, Init, 2-Way, ExStart, Exchange, Loading, Full. The Attempt state exists only on NBMA networks and is not used here. Option D correctly lists the first five states in order: Down → Init → 2-Way → ExStart → Exchange. Other options incorrectly include the NBMA-only Attempt state or misorder the states like Loading before Exchange.

Answer

Down, Attempt, Init, 2-Way, ExStart

Answer

Down, Init, 2-Way, ExStart, Loading

Answer

Down, Init, Attempt, 2-Way, ExStart

Question 5

Drag and drop the following OSPFv2 neighbor state transitions into the correct order, starting from the initial state when no neighbor information has been received.

Accepted Answer

Down, Init, 2-Way, ExStart, Exchange. OSPF neighbor states begin at Down, then Init after receiving Hello, 2-Way after seeing own router ID, ExStart for master/slave negotiation, and Exchange for exchanging database descriptors.

Answer

Down, 2-Way, Init, ExStart, Exchange

Answer

Down, Init, ExStart, 2-Way, Exchange

Answer

Down, Init, 2-Way, Exchange, ExStart

Question 6

Drag and drop the following OSPFv2 neighbor state transitions and DR/BDR election steps into the correct order for a multi-access network where a new router joins an existing OSPF area.

Accepted Answer

Down -> Init -> 2-Way -> ExStart -> Exchange -> Loading -> Full. The new router first discovers neighbors via Hello. Then DD, LSR, LSU exchange synchronizes databases. DR/BDR election happens before Full state is achieved.

Answer

Down -> Init -> 2-Way -> ExStart -> Exchange -> Full -> Loading

Answer

Down -> Init -> ExStart -> 2-Way -> Exchange -> Loading -> Full

Answer

Down -> Init -> 2-Way -> Exchange -> ExStart -> Loading -> Full

Question 7

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.. After configuring OSPF, clearing the process triggers neighbor state transitions from Down to Full, which can then be verified with the neighbor command.

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 8

Drag and drop the following OSPFv2 neighbor state transitions and DR/BDR election steps into the correct order for a multi-access network with default priority values.

Accepted Answer

Down, Init, 2-Way (DR/BDR election), ExStart, Exchange, Loading, Full. The correct OSPF neighbor state progression on a multi-access network is: Down, Init, 2-Way (with DR/BDR election), ExStart (master/slave negotiation), Exchange (DBD exchange), Loading (link-state request and update), and Full. Each option missing the Loading state or placing it incorrectly fails to represent the complete adjacency process.

Answer

Down, Init, ExStart, Exchange, Loading, 2-Way (DR/BDR election), Full

Answer

Down, Init, 2-Way (DR/BDR election), Loading, Exchange, ExStart, Full

Answer

Down, Init, 2-Way (DR/BDR election), ExStart, Exchange, Full

Question 9

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.. When a new router joins a multiaccess network that already has DR/BDR, it goes through the ExStart state with both the DR and BDR, then forms full adjacencies with both, regardless of its OSPF priority. Options A, B, and C are incorrect because they either describe adjacencies with only the DR, or claim the new router becomes DR/BDR, which cannot happen when DR/BDR are already elected.

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 10

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 is incorrect because DR and BDR form full adjacencies with all routers on the segment, not just with each other.

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 11

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), 2-Way (bidirectional), ExStart (master/slave election), Exchange (DBD packets), Loading (requesting missing LSAs via LSR/LSU), Full (LSDB synchronized). These states ensure proper adjacency formation and reliable database exchange.

Answer

Init: Hello packets received, but neighbor's Router ID not seen in Hello.

Answer

2-Way: Bidirectional communication established; both routers see each other in Hello packets.

Answer

ExStart: Master/slave election occurs; first DD packets exchanged.

Question 12

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.

Answer

Configure OSPFv3 process and router ID

Answer

Enable OSPFv3 on the interface

Answer

Verify OSPFv3 neighbor adjacency and route installation

Question 13

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

Accepted Answer

Enable IPv6 routing globally with 'ipv6 unicast-routing'. To configure OSPFv3 for IPv6, first enable IPv6 routing globally with 'ipv6 unicast-routing'. Next, enter OSPFv3 configuration mode using 'router ospfv3 1' to set process parameters. Then, apply OSPFv3 on each interface with 'ipv6 ospf area '. Finally, verify adjacencies with 'show ipv6 ospf neighbor'.

Question 14

Drag and drop the following commands into the correct order to configure OSPFv3 for IPv6 on a Cisco IOS-XE router.

Accepted Answer

ipv6 unicast-routing. First enable IPv6 routing, then create the OSPFv3 process, then assign the process to interfaces under interface configuration mode.

Question 15

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'. This order follows the logical workflow: first enable IPv6 globally, then configure the OSPFv3 process, apply it to the interface, and finally verify the results.