Which one of the following potential issues is eliminated by using split horizon?
A.
Joined horizons
B.
Packet forwarding loops
C.
cisco Express Forwarding load-balancing inconsistency
D.
Asymmetric routing throughout the network
Explanation:
Split horizon is a base technique used to reduce the chance of routing loops. Split horizon states
that it is never useful to send information about a route back in the direction from which the
information came and therefore routing information should not be sent back to the source from
which it came. In fact, only the interfaces are considered for the direction, not the neighbors. Note
that this rule works well not only for routes learned via a distance vector routing protocol but also
for routes installed in a routing table as directly connected networks.
As they reside on the same network, the neighbors do not need any advertisements on a path to
that shared network.
The split horizon rule helps prevent two-node (two-neighbor) routing loops and also improves
performance by eliminating unnecessary updates.