Refer to the exhibit. By default, when RTB passes BGP advertisements from RTA about
network 192.168.2.0 to RTC, what address will be listed as the next-hop address?
A.
10.1.1.2
B.
192.168.1.49
C.
10.1.1.1
D.
192.168.1.50
Explanation:
The next hop attribute is a well-known mandatory attribute, type code 3. In terms of an IGP,
such as RIP, the “next hop” to reach a route is the IP address of the router that has
announced the route.
The next hop concept with BGP is more complex and takes one of the following three forms:
• For EBGP sessions, the next hop is the IP address of the neighbor that announced
the route.
• For IBGP sessions, where routes originated inside the AS, the next hop is the IP
address of the neighbor that announced the route. For routes injected into the AS by way of
EBGP, the next hop learned from EBGP is carried unaltered into IBGP. The next hop is the
IP address of the EBGP neighbor from which the route was learned.
• When the route is advertised on a multiaccess medium, such as Ethernet or Frame
Relay, the next hop is usually the IP address of the interface of the router. This will be the
interface connected to the media that originated the route.