Netopia Motorola 3347-02 Router Manual PDF (Setup & Configuration Guide)

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adapter.

Board installed in a computer system to provide net-

work communication capability to and from that computer sys-

tem.

address mask.

See subnet mask.

ADSL.

Asymmetric Digital Subscriber Line. Modems attached

to twisted pair copper wiring that transmit 1.5-9 Mbps down-

stream (to the subscriber) and 16 -640 kbps upstream,

depending on line distance. (Downstream rates are usually

lower that 1.5Mbps in practice.)

AH.

The

A

uthentication

H

eader provides data origin authentica-

tion, connectionless integrity, and anti-replay protection ser-

vices. It protects all data in a datagram from tampering,

including the ﬁelds in the header that do not change in transit.

Does not provide conﬁdentiality.

ANSI.

American National Standards Institute.

ASCII.

American Standard Code for Information Interchange

(pronounced ASK-ee). Code in which numbers from 0 to 255

represent individual characters, such as letters, numbers, and

punctuation marks; used in text representation and communi-

cation protocols.

asynchronous communication.

Network system that allows

data to be sent at irregular intervals by preceding each octet

with a start bit and following it with a stop bit. Compare syn-

chronous communication.

Auth Protocol.

Authentication Protocol for IP packet header.

The three parameter values are None, Encapsulating Security

Payload (ESP) and Authentication Header (AH).

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-----B-----

backbone.

The segment of the network used as the primary

path for transporting trafﬁc between network segments.

baud rate.

Unit of signaling speed equal to the number of num-

ber of times per second a signal in a communications channel

varies between states. Baud is synonymous with bits per sec-

ond (bps) if each signal represents one bit.

binary.

Numbering system that uses only zeros and ones.

bps.

Bits per second. A measure of data transmission speed.

BRI.

Basic Rate Interface. ISDN standard for provision of low-

speed ISDN services (two B channels (64 kbps each) and one

D channel (16 kbps)) over a single wire pair.

bridge.

Device that passes packets between two network seg-

ments according to the packets' destination address.

broadcast.

Message sent to all nodes on a network.

broadcast address.

Special IP address reserved for simulta-

neous broadcast to all network nodes.

buffer.

Storage area used to hold data until it can be for-

warded.

-----C-----

carrier.

Signal suitable for transmission of information.

CCITT.

Comité Consultatif International Télégraphique et Télé-

phonique or Consultative Committee for International Telegraph

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and Telephone. An international organization responsible for

developing telecommunication standards.

CD.

Carrier Detect.

CHAP.

Challenge-Handshake Authentication Protocol. Security

protocol in PPP that prevents unauthorized access to network

services. See RFC 1334 for PAP speciﬁcations Compare PAP.

client.

Network node that requests services from a server.

CPE.

Customer Premises Equipment. Terminating equipment

such as terminals, telephones and modems that connects a

customer site to the telephone company network.

CO.

Central Ofﬁce. Typically a local telephone company facility

responsible for connecting all lines in an area.

compression.

Operation performed on a data set that reduces

its size to improve storage or transmission rate.

crossover cable.

Cable that lets you connect a port on one

Ethernet hub to a port on another Ethernet hub. You can order

an Ethernet crossover cable from Motorola Netopia®, if

needed.

CSU/DSU.

Channel Service Unit/Data Service Unit. Device

responsible for connecting a digital circuit, such as a T1 link,

with a terminal or data communications device.

-----D-----

data bits.

Number of bits used to make up a character.

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datagram.

Logical grouping of information sent as a network-

layer unit. Compare frame, packet.

DCE.

Digital Communication Equipment. Device that connects

the communication circuit to the network end node (DTE). A

modem and a CSU/DSU are examples of a DCE.

dedicated line.

Communication circuit that is used exclusively

to connect two network devices. Compare dial on demand.

DES. D

ata

E

ncryption

S

tandard is a 56-bit encryption algo-

rithm developed by the U.S. National Bureau of Standards (now

the National Institute of Standards and Technology).

3DES.

Triple DES, with a 168 bit encryption key, is the most

accepted variant of DES.

DH Group.

Difﬁe-Hellman is a public key algorithm used

between two systems to determine and deliver secret keys

used for encryption. Groups 1, 2 and 5 are supported. Also,

see Difﬁe-Hellman listing.

DHCP.

Dynamic Host Conﬁguration Protocol. A network conﬁgu-

ration protocol that lets a router or other device assign IP

addresses and supply other network conﬁguration information

to computers on your network.

dial on demand.

Communication circuit opened over standard

telephone lines when a network connection is needed.

Difﬁe-Hellman.

A group of key-agreement algorithms that let

two computers compute a key independently without exchang-

ing the actual key. It can generate an unbiased secret key over

an insecure medium.

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domain name.

Name identifying an organization on the Inter-

net. Domain names consists of sets of characters separated by

periods (dots). The last set of characters identiﬁes the type of

organization (.GOV, .COM, .EDU) or geographical location (.US,

.SE).

domain name server.

Network computer that matches host

names to IP addresses in response to Domain Name System

(DNS) requests.

Domain Name System (DNS).

Standard method of identifying

computers by name rather than by numeric IP address.

DSL.

Digital Subscriber Line. Modems on either end of a single

twisted pair wire that delivers ISDN Basic Rate Access.

DTE.

Data Terminal Equipment. Network node that passes

information to a DCE (modem) for transmission. A computer or

router communicating through a modem is an example of a DTE

device.

DTR.

Data Terminal Ready. Circuit activated to indicate to a

modem (or other DCE) that the computer (or other DTE) is ready

to send and receive data.

-----E-----

echo interval.

Frequency with which the router sends out echo

requests.

Enable.

This toggle button is used to enable/disable the con-

ﬁgured tunnel.

Rate

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