Garmin HM210DP/DI - Manual (Page 130)

Glossary
122 EN/LZT 108 6492 R2 - October 2003
Alternatively, the maximum number of hops that a packet is allowed to take
before being discarded (see also TTL).
Host
A computer that is connected to a TCP/IP network, including the Internet.
Each host has a unique IP address.
HTTP
Short for HyperText Transfer Protocol. HTTP is the main protocol used to
transfer data from web sites so that it can be displayed by web browsers.
- I -
ICMP
Short for Internet Control Message Protocol. An Internet protocol used to
report errors and other network related information. The PING command
makes use of ICMP.
IGMP
Short for Internet Group Management Protocol. An Internet protocol that
enables a computer to share information about its membership in multicast
groups with adjacent routers. A multicast group of computers is one whose
members have designated as interested in receiving specific content from
the others. Multicasting to an IGMP group can be used to simultaneously
update the address books of a group of mobile computer users or to send
company newsletters to a distribution list.
Internet
The global collection of interconnected networks used for both private and
business communications.
Intranet
A private, company-internal network that looks like part of the Internet
(users access information using web browsers), but is accessible only by
employees.
IP address
An identifier for a computer or device on a TCP/IP network. Networks using
the TCP/IP protocol route messages based on the IP address of the
destination. The format of an IP address is a 32-bit numeric address written
as four numbers separated by periods. Each number can be zero to 255,
for example 192.168.0.1.
Public IP addresses are LAN IP addresses that can be considered "legal"
for the Internet because they can be recognized and accessed by any
device on the other side of a connection. In most cases your ISP allocates
them.