Question$-22)$

Consider the network shown below. Suppose AS$3$ and AS$2$ are running

OSPF for their intra$-$AS routing protocol. Suppose AS$1$ and AS$4$ 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 AS$2$ and AS$4.$

Router $3$a learns about IP address $\backslash (\backslash$boldsymbol$\{$X$\}\backslash )$ from which routing protocol: eBGP $($exterior Border Gateway Protocol$),$ or iBGP $($interior Border Gateway Protocol$)?$

eBGP $($exterior Border Gateway Protocol$)$

iBGP $($interior Border Gateway Protocol$)$