CompTIA Network+ Network+ Routing Protocols and Concepts 2 — Questions and Answers
Question 1: OSPF calculates the best path using which algorithm?
- Bellman-Ford algorithm
- Dijkstra's Shortest Path First algorithm (Correct answer)
- Distance-vector algorithm
- Spanning Tree algorithm
Correct answer: Dijkstra's Shortest Path First algorithm
OSPF uses Dijkstra's Shortest Path First (SPF) algorithm to build a complete map of the network and calculate the lowest-cost path to each destination.
Question 2: What is the maximum hop count allowed in RIPv2 before a route is considered unreachable?
- 10
- 15 (Correct answer)
- 16
- 255
Correct answer: 15
RIPv2 allows a maximum hop count of 15; a hop count of 16 represents infinity and marks the route as unreachable.
Question 3: Which routing protocol divides networks into 'areas' to reduce routing overhead and improve scalability?
- RIPv2
- EIGRP
- OSPF (Correct answer)
- BGP
Correct answer: OSPF
OSPF uses a hierarchical area structure with Area 0 as the backbone, limiting LSA flooding and reducing the size of link-state databases in each area.
Question 4: Which two components does EIGRP use by default in its composite metric calculation?
- Hop count and delay
- Bandwidth and delay (Correct answer)
- Cost and reliability
- Bandwidth and reliability
Correct answer: Bandwidth and delay
EIGRP uses bandwidth and delay as its default metric components, though it can optionally include load, reliability, and MTU in the calculation.
Question 5: What does routing protocol 'convergence' describe?
- When all routers in the network have consistent, accurate routing information (Correct answer)
- When a router receives its first routing update after boot
- When multiple routing protocols are running on the same device
- When a network link transitions from up to down state
Correct answer: When all routers in the network have consistent, accurate routing information
Convergence is the state where all routers in a network have synchronized, accurate, and consistent routing tables reflecting the current network topology.
Question 6: Which routing protocol type sends its complete routing table to neighbors on a periodic timer?
- Link-state protocol
- Path-vector protocol
- Distance-vector protocol (Correct answer)
- Hybrid protocol
Correct answer: Distance-vector protocol
Distance-vector protocols like RIP periodically broadcast or multicast their entire routing table to directly connected neighbors.
Question 7: BGP is primarily used to exchange routing information between which entities?
- VLANs within a switched campus network
- Subnets within a single enterprise LAN
- Autonomous systems operated by different organizations (Correct answer)
- Wireless access points and their controllers
Correct answer: Autonomous systems operated by different organizations
BGP exchanges routing information between autonomous systems (identified by AS numbers), making it the routing protocol that powers the global internet.
CompTIA Network+ Network+ Routing Protocols and Concepts 2
OSPF calculates the best path using which algorithm?