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Which two protocols are link-state routing protocols? (Choose two.)EIGRPOSPFBGPRIPISIS

Question

Which two protocols are link-state routing protocols? (Choose two.)

  • EIGRP
  • OSPF
  • BGP
  • RIP
  • IS-IS
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Solution

Sure, let's break down the question step by step to identify which two protocols are link-state routing protocols.

  1. Understanding Link-State Routing Protocols:

    • Link-state routing protocols maintain a complete map of the network topology.
    • They use algorithms like Dijkstra's to calculate the shortest path to each node.
    • They are more complex and require more memory and processing power compared to distance-vector protocols.
  2. List of Protocols Given:

    • EIGRP (Enhanced Interior Gateway Routing Protocol)
    • OSPF (Open Shortest Path First)
    • BGP (Border Gateway Protocol)
    • RIP (Routing Information Protocol)
    • IS-IS (Intermediate System to Intermediate System)
  3. Identifying Link-State Protocols:

    • OSPF (Open Shortest Path First):
      • OSPF is a widely used link-state routing protocol.
      • It uses the Dijkstra algorithm to compute the shortest path tree.
    • IS-IS (Intermediate System to Intermediate System):
      • IS-IS is another link-state routing protocol.
      • It also uses the Dijkstra algorithm for path computation.
  4. Eliminating Non-Link-State Protocols:

    • EIGRP: This is a hybrid routing protocol that combines features of both distance-vector and link-state protocols, but it is not purely a link-state protocol.
    • BGP: This is a path-vector protocol used for inter-domain routing, not a link-state protocol.
    • RIP: This is a distance-vector routing protocol, not a link-state protocol.
  5. Conclusion:

    • The two link-state routing protocols from the given list are:
      • OSPF (Open Shortest Path First)
      • IS-IS (Intermediate System to Intermediate System)

So, the correct answer is:

  • OSPF
  • IS-IS

This problem has been solved

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