MyNetSec

All of networking starting with TCP/IP, Just to reference for IP,TCP, UDP, ICMP header size.. Comparison of IPV4 and IPV6 header IPV6 Header (protocol Number :41) IPV4 Header (protocol Number: 4) TCP Header (protocol number: 6) UDP Header (protocol number :17) ICMP Header (protocol number: 1) http://nmap.org/book/tcpip-ref.html

Ever wonder why Checkpoint firewall usually cost much more then comparable firewall??? I guess the following table give up pretty much a good detail of why do you have to pay a premium for that..