It is for the....
Advanced Routing Protocols... It is called Explicit Congestion Notification. A two-bit IP packet header field that allows for reduction in the number of TCP retransmissions on the Internet [link|http://www.rfc-editor.org/rfc/rfc3168.txt|RFC 3168] explain it in gory details...
[link|mailto:curley95@attbi.com|greg] - Grand-Master Artist in IT
[link|http://www.iwethey.org/ed_curry/|REMEMBER ED CURRY!!!]
Your friendly Homeland Security Officer reminds:
Hold Thumbprint to Screen for 5 seconds, we'll take the imprint, or
Just continue to type on your keyboard, and we'll just sample your DNA.