HP OfficeConnect Firewall Series Manuel d'utilisateur télécharger pdf (Page 148)

Appendix 21. SAFETY INFORMATION OfficeConnect VPN Firewall User’s Manual

134

NAT rule A defined method for translating between public and

private IP addresses on your LAN.

network A group of computers that are connected together,

allowing them to communicate with each other and share

resources, such as software, files, etc. A network can be

small, such as a LAN, or very large, such as the Internet.

network mask A network mask is a sequence of bits applied to an IP

address to select the network ID while ignoring the host

ID. Bits set to 1 mean "select this bit" while bits set to 0

mean "ignore this bit." For example, if the network mask

255.255.255.0 is applied to the IP address 100.10.50.1,

the network ID is 100.10.50, and the host ID is 1. See

also binary, IP address, subnet, "IP Addresses Explained"

section.

NIC Network Interface Card

An adapter card that plugs into your computer and

provides the physical interface to your network cabling,

which for Ethernet NICs is typically an RJ-45 connector.

See Ethernet, RJ-45.

packet Data transmitted on a network consists of units called

packets. Each packet contains a payload (the data), plus

overhead information such as where it came from (source

address) and where it should go (destination address).

ping Packet Internet (or Inter-Network) Groper

A program used to verify whether the host associated with

an IP address is online. It can also be used to reveal the

IP address for a given domain name.

port A physical access point to a device such as a computer or

router, through which data flows into and out of the

device.

PPP Point-to-Point Protocol

A protocol for serial data transmission that is used to

carry IP (and other protocol) data between your ISP and

your computer. The WAN interface on the OfficeConnect

Gigabit VPN Firewall uses two forms of PPP called

PPPoA and PPPoE. See also PPPoA, PPPoE.

PPPoE Point-to-Point Protocol over Ethernet

One of the two types of PPP interfaces you can define for

a Virtual Circuit (VC), the other type being PPPoA. You

can define one or more PPPoE interfaces per VC.

protocol A set of rules governing the transmission of data. In order

for a data transmission to work, both ends of the

connection have to follow the rules of the protocol.

remote In a physically separate location. For example, an

employee away on travel who logs in to the company’s

intranet is a remote user.

RIP Routing Information Protocol

The original TCP/IP routing protocol. There are two

versions of RIP: version I and version II.

RJ-45 Registered Jack Standard-45

The 8-pin plug used in transmitting data over phone lines.

Ethernet cabling usually uses this type of connector.

routing Forwarding data between your network and the Internet on

the most efficient route, based on the data’s destination

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HP OfficeConnect Firewall Series Manuel d'utilisateur Page 148

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