Which two statements are true about the role of split horizon? (Choose two.)

A.
It is a function used by routing protocols to install routes into routing table

B.
It is a function that prevents the advertising of routes over an interface that the router is using to
reach a route

C.
Its function is to help avoid routing loops.

D.
It is a redistribution technique used by routing protocols

Explanation:
Split horizon is a method of preventing a routing loop in a network. The basic principle is simple:
Information about the routing for a particular packet is never sent back in the direction from which
it was received.
Split horizon can be achieved by means of a technique called poison reverse. This is the
equivalent of route poisoning all possible reverse paths – that is, informing all routers that the path
back to the originating node for a particular packet has an infinite metric. Split horizon with poison
reverse is more effective than simple split horizon in networks with multiple routing paths, although
it affords no improvement over simple split horizon in networks with only one routing path.