Manual

MoRoS GPRS 1.3 Glossary

17 Glossary

This describes the most important terms and abbreviations of this manual.

AT command: Commands to devices such as modems to set up this device.

CHAP: Challenge Handshake Authentication Protocol; an authentication protocol

often used for -> PPP connections.

DHCP: Dynamic Host Configuration Protocol; DHCP servers can dynamically de-

sign an IP address and other parameters to DHCP clients on request.

Dial-in: MoRoS can be called via a dial-in connection and then create a connec-

tion to the LAN.

Dial-out: MoRoS can use a Dial-up to make calls and to perform Internet connec-

tions, for example.

Gateway: This is a machine that works like a -> Router. In contrast to the router, a

gateway can also route data packets from different hardware networks.

ISP: Internet Service Provider; an ISP can be called using a dial-up connection

(e.g. with an analogue modem or ISDN-TA). The ISP will then provide ac-

cess to the Internet via this dial-up connection.

LAN: Local Area Network; a network of computers which are located relatively

close to each other.

MAC address: Media Access Control Address. A MAC is a part of an Ethernet interface.

Each Ethernet interface has a unique global number, the MAC address.

PAP: Password Authentication Protocol; an authentication protocol often used

for -> PPP connections.

PPP: Point to Point Protocol; a protocol, which connects two machines via a

serial line to enable the exchange of TCP/IP packets between those two

machines.

Router: This is a machine in a network, which is responsible for the incoming

data of a protocol to be forwarded to the planned destination or sub

network.

Switch: A device that can connect several machines with the Ethernet. In contrast

to a hub, a switch will "think” by itself, i.e. it can remember the MAC ad-

dresses connected to a port and directs the traffic more efficiently to the

individual ports.

URL: Uniform Resource Locator; this is the address used by a service to be

found in the web browser. In this manual, an URL is mostly entered as the

IP address of the MoRoS.

WAN: Wide Area Network; a network consisting of computers, which are located

far away from each other.