Digi X2 - Manual (Page 230)

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HTTP
See HyperText Transfer Protocol.
HTTPS
See HyperText Transfer Protocol over Secure Socket Layer.
HyperText Transfer Protocol (HTTP)
An application protocol in the TCP/IP suite that defines the rules for transferring files
(text, graphic images, sound, video, and other multimedia files) on the World Wide web
(WWW).
HyperText Transfer Protocol over Secure Socket Layer (HTTPS)
A secure message-oriented communications protocol designed for use in conjunction
with HTTP. HTTPS encrypts and decrypts user page requests as well as the pages that
are returned by the web server. HTTPS uses the Secure Socket Layer (SSL) as a
sublayer.
ICMP
See Internet Control Message Protocol.
IGMP
See Internet Group Management Protocol.
Internet Control Message Protocol (ICMP)
A message control and error-reporting protocol between a host server and a gateway to
the Internet. ICMP uses Internet Protocol (IP) datagrams, but the messages are
processed by the IP software and are not directly apparent to the application user.