computer communication

2 6. (15%) Consider the network shown below. Suppose AS3 and AS2 are running OSPF for their intra- AS routing protocol. Suppose ASI and AS4 are running RIP for their intra-AS routing protocol. Suppose eBGP and iBGP are used for the inter-AS routing protocol. Initially suppose there is no physical link between AS2 and AS4. a. (5%) Router Id learns about prefix x from which routing protocol? b. (5%) Once Router Id learns about x it will put an entry (x, /) in its forwarding table. Will / be equal to 1 or 12 for this entry? Explain why in one sentence. c. (5%) Now suppose that there is a physical link between AS2 and AS4, shown by the dotted line. Support Router Id learns that x is accessible via AS2 as well as via AS3. Will / be set to /, or /2? Explain in one sentence. 3c AS4 3a 20 3b 2a 1c 2b AS3 13 1b AS2 1d AS1