Garmin HM210DP/DI manual Host, Http, Icmp, Igmp, Internet, Intranet, IP address

Glossary

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.

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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.

122 EN/LZT 108 6492 R2 - October 2003