Nortel BayStack Instant Internet 100-S Using Manual page 319

DSU
Digital Service Unit. A device connecting data terminal equipment (DTE) to
digital communication lines, which ensures that data to be transmitted across
the network is formatted correctly.
Echo
A service used for troubleshooting that sends back any message or packet sent
to it.
ESF
Extended Superframe.
Ethernet
A widely used LAN technology defined by the Ethernet and IEEE 802.3
specification.
encryption
A way to achieve data security by translating data into a secret code. To read
an encrypted file, you must have access to a secret key or password that
enables you to decrypt it. When configuring IPsec for a VPN, you can choose
from DES, 3DES, and null.
FAS
Frame Alignment Signal. A distinctive signal inserted within a frame that
helps maintain synchronization.
filtering
The process of examining a data packet on the network and determining the
destination of the data to decide whether the packet should be passed along on
the local LAN, copied to another LAN, or dropped.
FQDN
Fully Qualified Domain Name. The complete combination of the host name,
domain nam and top-level domain. For example: www.NortelNetworks.com.
frame
A unit of data transmission in a local area network, usually Ethernet or token
ring.
Using the BayStack Instant Internet Management Software Version 7.11
Glossary 319