HP OfficeConnect Firewall Series Manuel d'utilisateur télécharger pdf (Page 145)

OfficeConnect Gigabit VPN Firewall User’s Manual Appendix 22. OBTAINING SUPPORT FOR YOUR PRODUCT

131

25 Glossary

10BASE-T A designation for the type of wiring used by Ethernet

networks with a data rate of 10 Mbps. Also known as

Category 3 (CAT 3) wiring. See also data rate, Ethernet.

100BASE-T A designation for the type of wiring used by Ethernet

networks with a data rate of 100 Mbps. Also known as

Category 5 (CAT 5) wiring. See also data rate, Ethernet.

ADSL Asymmetric Digital Subscriber Line

The most commonly deployed "flavor" of DSL for home

users. The term asymmetrical refers to its unequal data

rates for downloading and uploading (the download rate is

higher than the upload rate). The asymmetrical rates

benefit home users because they typically download

much more data from the Internet than they upload.

authenticate To verify user’s identity, such as by prompting for a

password.

binary The "base two" system of numbers, that uses only two

digits, 0 and 1, to represent all numbers. In binary, the

number 1 is written as 1, 2 as 10, 3 as 11, 4 as 100, etc.

Although expressed as decimal numbers for convenience,

IP addresses in actual use are binary numbers; e.g., the

IP address 209.191.4.240 is

11010001.10111111.00000100.11110000 in binary. See

also bit, IP address, network mask.

bit Short for "binary digit," a bit is a number that can have two

values, 0 or 1. See also binary.

bps bits per second

broadband A telecommunications technology that can send different

types of data over the same medium. DSL is a broadband

technology.

broadcast To send data to all computers on a network.

DHCP Dynamic Host Configuration Protocol

DHCP automates address assignment and management.

When a computer connects to the LAN, DHCP assigns it

an IP address from a shared pool of IP addresses; after a

specified time limit, DHCP returns the address to the pool.

DHCP relay Dynamic Host Configuration Protocol relay

A DHCP relay is a computer that forwards DHCP data

between computers that request IP addresses and the

DHCP server that assigns the addresses. Each of the

OfficeConnect Gigabit VPN Firewall's interfaces can be

configured as a DHCP relay. See DHCP.

DHCP server Dynamic Host Configuration Protocol server

A DHCP server is a computer that is responsible for

assigning IP addresses to the computers on a LAN. See

DHCP.

DNS Domain Name System

The DNS maps domain names into IP addresses. DNS

information is distributed hierarchically throughout the

Internet among computers called DNS servers. When you

start to access a web site, a DNS server looks up the

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HP OfficeConnect Firewall Series Manuel d'utilisateur Page 145

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