NETGEAR fvs114 manual See Internet Control Message Protocol

Reference Manual for the ProSafe VPN Firewall FVS114

Ethernet

A LAN specification developed jointly by Xerox, Intel and Digital Equipment Corporation. Ethernet networks transmit packets at a rate of 10 Mbps.

G

Gateway

A local device, usually a router, that connects hosts on a local network to other networks.

I

ICMP

See “Internet Control Message Protocol”

IEEE

Institute of Electrical and Electronics Engineers. This American organization was founded in 1963 and sets standards for computers and communications.

IETF

Internet Engineering Task Force. An organization responsible for providing engineering solutions for TCP/ IP networks. In the network management area, this group is responsible for the development of the SNMP protocol.

IKE

Internet Key Exchange. An automated method for exchanging and managing encryption keys between two VPN devices.

Internet Control Message Protocol

ICMP is an extension to the Internet Protocol (IP) that supports packets containing error, control, and informational messages. The PING command, for example, uses ICMP to test an Internet connection.

Internet Protocol

The method or protocol by which data is sent from one computer to another on the Internet. Each computer (known as a host) on the Internet has at least one IP address that uniquely identifies it among all other computers on the Internet. When you send or receive data (for example, an e-mail note or a Web page), the message gets divided into little chunks called packets. Each of these packets contains both the sender's Internet address and the receiver's address. Any packet is sent first to a gateway computer that understands a small part of the Internet. The gateway computer reads the destination address and forwards the packet to an adjacent gateway that in turn reads the destination address and so forth across the Internet until one gateway recognizes the packet as belonging to a computer within its immediate neighborhood or domain. That

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202-10098-01, April 2005