Solution

The correct answer is B, C & D Only.

Key Points

• Link state routing does not suffer from the count-to-infinity problem, unlike distance vector routing.
• It uses flooding to distribute link state packets across the network.
• Each router generates its own link state packet, containing information about its directly connected links.
• All routers maintain an identical link state database to ensure consistent network-wide knowledge.
• Each router computes the shortest path to other routers using Dijkstra’s algorithm, not distance vector routing.

Additional Information

• Advantages of Link State Routing:
  • Greater accuracy due to consistent link state information.
  • Faster convergence during network changes.
  • Efficient utilization of network resources.
• Disadvantages of Link State Routing:
  • Requires significant memory and processing power to maintain the database and compute routes.
  • Flooding can lead to high overhead in large networks.
• Key Algorithms:
  • Dijkstra’s Algorithm: Used to calculate the shortest path tree.
  • Flooding: Ensures all routers receive link state information.
• Important Points:
  • Link state routing protocols include OSPF (Open Shortest Path First) and IS-IS (Intermediate System to Intermediate System).
  • Routers exchange link state advertisements (LSAs) to build the link state database.
  • Each router independently computes its routing table based on the link state database.