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- S routing protocol. Initially suppose there is no physical link between AS2 and AS4.
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 1c learns about x from which routing protocol?
d. Router 1d learns about x from which routing protocol?
EBGP: external BGP runs between routers in different ASs
IBGP: internal BGP runs between routers in the same AS
a. eBGP: Router 3c learns about x from eBGP
b. iBGP: Router 3a learns about x from iBGP
c. eBGP: Router 1c learns about x from eBGP
d. iBGP: Router 1d learns about x from iBGP