Which three statements about the default behaviour of eBGP sessions are true? (Choose three.)
A.
eBGP sessions between sub-ASs in different confederations transmit the next hop unchanged.
B.
The next hop in an eBGP peering is the IP address of the neighbor that announced the route.
C.
When a route reflector reflects a route to a client, it transmits the next hop unchanged.
D.
The next hop in an eBGP peering is the loopback address of the interface that originated the
route.
E.
The next hop in an eBGP peering is the loopback address of the neighbor that announced the
route.
F.
When a route reflector reflects a route to a client, it changes the next hop to its own address.
A, B, C are correct.
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Answer A looks weird in its current state. I bet they meant EBGP sessions between different confeds within the same AS.
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Do external BGP (eBGP) sessions between confederations modify the next hop?
No, eBGP sessions between confederation sub-ASes do not modify the next hop attribute.
http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5816-bgpfaq-5816.html#anc17
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