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PPP Point-to-Point Protocol A protocol for serial data transmis-

sion that is used to carry IP (and other protocol) data

between your ISP and your computer. The WAN interface

on the My ADSL Modem uses two forms of PPP called PP-

PoA and PPPoE. See also PPPoA, PPPoE.

PPPoA Point-to-Point Protocol over ATM One of the two types of

PPP interfaces you can dene for a Virtual Circuit (VC),

the other type being PPPoE. You can dene only one PP-

PoA interface per VC.

PPPoE Point-to-Point Protocol over Ethernet One of the two

types of PPP interfaces you can dene for a Virtual Circuit

(VC),the other type being PPPoA. You can dene 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 connec-

tion 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 and ver-

sion II.

RJ-11 Registered Jack Standard-11 The standard plug used to

connect telephones, fax machines, modems, etc. to a

telephone jack. It is a 6-pin connector usually containing

four wires.

RJ-45 Registered Jack Standard-45 The 8-pin plug used in

transmitting data over phone lines. Ethernet cabling usu-

ally uses this type of connector.

routi Forwarding data between your network and the Internet

on the most efcient route, based on the data’s destina-

tion IP address and current network conditions. A device

that performs routing is called a router.

rule See ltering rule, NAT rule.

SDNS Secondary Domain Name System (server) A DNS server

that can be used if the primary DSN server is not avail-

able. See DNS.

splitter A device that splits off the voice component of the DSL

signal to a separate line, so that data and telephone

service each have their own wiring and jacks. The splitter

is installed by your telephone company where the DSL

line enters your home. The CO also contains splitters that

separate the voice and data signals, sending voice to the

PSTN and data on high-speed lines to the Internet. See

also CO, PSTN, splitterless, microlter.

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