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Help Alyssa figure out which of these strategies will work correctly, and which will result in routing with loops. In case of strategies that do result in routing loops, come up with an example network topology with a routing loop to convince Alyssa. Answer: All except SecondMinCost will work fine.
3 paź 2024 · Link state routing is a popular algorithm used in unicast routing to determine the shortest path in a network. Understanding how link state protocols work is key to mastering routing algorithms.
stra (used by link-state protocols) algorithm on G would lead to the same forwarding state. Solution: False. In general, both solve the shortest-path problem. However, whenever multiple shortest paths ex-ist, the two algorithms can decide differently based on their tie-breaking criteria. b) Link-state protocols (such as OSPF) are guaranteed to
Alyssa P. Hacker manages MIT's internal network that runs link-state routing. She wants to experiment with a few possible routing strategies. Of all possible paths available to a particular destination at a node, a routing strategy specifies the path that must be picked to create a routing table entry.
Basic link state algorithm plus many features: Authentication of routing messages Extra hierarchy: Partition into routing areas » “Border”router pretends to be directly connected to all routers in an area (answers for them) Load balancing: Multiple equal cost routes 20 Real Link-state Protocols
Basic link state algorithm plus many features: Authentication of routing messages Extra hierarchy: Partition into routing areas » “Border” router pretends to be directly connected to all routers in an area (answers for them) Load balancing: Multiple equal cost routes CSE 123 – Lecture 12: Link-state Routing 30
Link State Approach to Routing •Shortest paths in graph: classic theory problem •Classic centralized single-source shortest paths algorithm: Dijkstra’s Algorithm –requires map of entire network •Link State (LS) Routing: –push network map to every router –each router learns link state database –each router runs Dijkstra’s locally