Attacker forges a TCP/IP packet, which causes the victim to try opening a connection with itself. This causes the system to go into an infinite loop trying to resolve this unexpected connection. Eventually, the connection times out, but during this resolution, the machine appears to hang or become very slow. The attacker sends such packets on a regular basis to slow down the system.

Unpatched Windows XP and Windows Server 2003 machines are vulnerable to these attacks.

What type of Denial of Service attack is represented here?

A.
SMURF Attacks

B.
Targa attacks

C.
LAND attacks

D.
SYN Flood attacks

Explanation:
The attack involves sending a spoofed TCP SYN packet (connection initiation) with the target host’s IP address and an open port
as both source and destination.The reason a LAND attack works is because it causes the machine to reply to itself continuously.

http://en.wikipedia.org/wiki/LAND