You are concerned about attacks against your network, and have decided to implement some
defensive measure on your routers. If you have 3 interfaces, S1, S0, and E0, and you implement

the following configuration, what attack will you be defending against?
Router#config terminal
Router(config)# Interface Ethernet 0
Router(config-if)#no ip directed broadcast
Router(config-if)#Interface Serial 0
Router(config-if)#no ip directed broadcast
Router(config-if)#Interface Serial 1
Router(config-if)#no ip directed broadcast
Router(config)#^Z
Router#

A.
Smurf

B.
BO2K

C.
SubSeven

D.
Any Trojan

E.
Any Worm