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7 Glossary
10Base-T
It is an Ethernet standard for a local area network (LAN). 10Base-T uses a
twisted pair cable with a maximum length of 100 meters.
AAL
ATM is an adaptation layer that defines the rules governing segmentation and
reassembly of data into cells. Different AAL types are suited to different traffic
classes.
ADSL
An asymmetric digital subscriber line is an asymmetrical data transmission
technology with a high traffic rate downstream and a low traffic rate upstream.
ADSL technology satisfies the bandwidth requirement of applications that
demand “asymmetric” traffic, such as Web surfing, file downloads and video-on-
demand (VOD).
ATM
Asynchronous transfer mode is a Layer 2 protocol supporting high-speed
asynchronous data with advanced traffic management and quality-of-service
features.
Bridge
A device that connects two or more physical networks and forwards packets
between them. Bridges can usually be made to filter packets; that is, to forward
only certain traffic. Related devices are repeaters, which simply forward electrical
signals from one cable to another, and full-fledged routers, which make routing
decisions based on several criteria.
Default Gateway (Router)
Every non-router IP device needs to configure a default gateway’s IP address.
When the device sends out an IP packet, if the destination is not on the same
network, the device has to send the packet to its default gateway, which will then
send it out toward the destination.
DHCP
The Dynamic Host Configuration Protocol automatically gives every computer on
your home network an IP address.