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l2-security-bh.ppt
Misuse of Gratuitous ARP
¥ ARP has no security or ownership of IP or MAC
addresses
¥ What if we did the following?
¥ Host W broadcasts IÕm 1.2.3.1 with MAC
12:34:56:78:9A:BC
¥ (Wait 5 seconds)
¥ Host W broadcasts IÕm 1.2.3.1 with MAC
12:34:56:78:9A:BC
1.2.3.0/24
Host W
.4
.1
Host Y
.2
Host X
.3
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