Network Layer CS176A Ramya Raghavendra. Routing table [Q1] Destination Address Range Link Interface 10000000 00000000 00000000 00000000 Through0 10000000.

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Presentation transcript:

Network Layer CS176A Ramya Raghavendra

Routing table [Q1] Destination Address Range Link Interface Through Through Through Otherwise 3

Subnetting [Q2] A B C D E F

Subnetting / N bits – 2 n addresses : 8 bits – 256 etc Each router: subnet (A,B or C) + 2 of (D, E, F) Longest Prefix matching (Examples) – : A – : D

NAT Translation Table [Q3] NAT translation table WAN sideLAN side , , , , , , , ,4001

Dijkstra’s Algorithm Have some fun:

Link State Routing [Q6] u 5 6

Reverse Path Forwarding [Q7] Controlled flooding Router receives a broadcast packet Checks if the packet came on the “shortest unicast link” to the source –Path used to send a unicast packet to source If so, forwards it on all other links Else discards it

Illustration of RPF

Questions on Extra Credit? - Is it easy? Yes me!