Acronyms AH Authentication Header (RFC 2402) ARP Address Resolution Protocol (RFC 826) BGP Border Gateway Protocol (RFC 1771) CWR Congestion Window Reduced (RFC 2481) DF Do not fragment flag (RFC 791) DHCP Dynamic Host Configuration Protocol (RFC 2131) DNS Domain Name System (RFC 1035) ECN Explicit Congestion Notification (RFC 3168) ESP Encapsulating Security Payload (RFC 2406) FTP File Transfer Protocol (RFC 959) GRE Generic Route Encapsulation (RFC 2784) HTTP Hypertext Transfer Protocol (RFC 1945) ICMP Internet Control Message Protocol (RFC 792) IGMP Internet Group Management Protocol (RFC 2236) IMAP Internet Message Access Protocol (RFC 2060) IP Internet Protocol (RFC 791) ISAKMP Internet Sec. Assoc. & Key Mngm Proto. (RFC 7296) L2TP Layer 2 Tunneling Protocol (RFC 2661) OSPF Open Shortest Path First (RFC 1583) POP3 Post Office Protocol v3 (RFC 1460) RFC Request for Comments SMTP Simple Mail Transfer Protocol (RFC 821) SSH Secure Shell (RFC 4253) SSL Secure Sockets Layer (RFC
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