What should Peter do to prevent a smurf attack?

Peter is a Network Admin. He is concerned that his network is vulnerable to a smurf attack. What should Peter do to prevent a smurf attack? Select the best answer.

A.
He should disable unicast on all routers

B.
Disable multicast on the router

C.
Turn off fragmentation on his router

D.
Make sure all anti-virus protection is updated on all systems

E.
Make sure his router won’t take a directed broadcast