P37. Consider the network shown below. Suppose AS3 and AS2 are running OSPF for their intra-AS routing protocol. Suppose AS1 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 PROBLEMS 425 a Router 3c learns about prefix x from which routing protocol: OSPF, RIP eBGP, or iBGP? b. Router 3a learns about x from which routing protocol? c. Router Ic learns about x from which routing protocol? d. Router ld learns about x from which routing protocol? 4b 4c 4a AS4 3c 2c ?? 2a 3b 2b 1c 1b AS3 AS2 1d AS1 P38. Referring to the previous problem, once router Id learns about a it will put an