Similar to IPcomp

S/MIME

Point-to-Point Tunneling Protocol

Secure Hypertext Transfer Protocol

Layer 2 Tunneling Protocol

Simple public-key infrastructure

Multicast Listener Discovery

Common Open Policy Service

Media Gateway Control Protocol

RADIUS

H.248

Session Announcement Protocol

MISTY1

Sieve (mail filtering language)

6to4

CAdES (computing)

Syslog

SHA-1

SFlow

Session Initiation Protocol

VCDIFF

DHCPv6

STUN

Internationalized domain name

Punycode

Evil bit

Ogg

Server Name Indication

Real-time Transport Protocol