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
Explanation:
Unicasts are one-to-one IP transmissions,by disabling this he would disable most network
transmissions but still not prevent the smurf attack. Turning of multicast or fragmentation on the
router has nothing to do with Peter’s concerns as a smurf attack uses broadcast,not multicast and
has nothing to do with fragmentation. Anti-virus protection will not help prevent a smurf attack. A
smurf attack is a broadcast from a spoofed source. If directed broadcasts are enabled on the
destination all the computers at the destination will respond to the spoofed source,which is really
the victim. Disabling directed broadcasts on a router can prevent the attack.
E