Glossary – Panasonic NN46240-501 User Manual
Page 222
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Nortel Secure Router 8000 Series
A Glossary
Glossary
A
Accounting
A network security service that records the user’s access to the network.
Agent
A process that resides in all managed devices. It receives request packets from
the Network Manager (NM) Station and performs the Read or Write operation
on managed variables according to packet types and generates response packets
and sends them to the NM Station.
AH
Authentication Header. A security protocol that provides data authentication
and integrity for IP packets. AH is used in the transmission mode and the
tunneling mode.
ASSP
Analog Sensor Signal Processes. An error tolerance protocol that provides the
interface backup for multiple access and multicast networking, and broadcast
LANs such as Ethernet.
ATM
Asynchronous transfer mode. A connection-oriented network technology that
uses a fixed cell (53 bytes) to transfer services of multiple types such as text,
audio, or video data. The fixed length of the ATM cells enables hardware
processing of the cells and shortens the forwarding delay. ATM takes
advantage of high-speed media such as E3, SONET, and T3.
Authentication
A method by which the system validates a user's logon information.
Authorization
A method used to give permission of network service to users according to
authentication.
B
Backup center
A mechanism by which the system traces the status of the interface, and
interfaces on a device back each other up. If an interface is down, the backup
center provides a backup interface to provide the service.
BFD
Bidirectional Forwarding Detection. A unified detection mechanism that
detects and monitors the link or IP routes forwarding at a fast pace.
Black list
A filtering mode that is used to filter packets according to the source IP
address. Compared with the Access Control List (ACL), the black list can filter
packets at a high speed because its matching region is simple. It can shield the
packet from the specified IP address.
Issue 5.3 (30 March 2009)
Nortel Networks Inc.
A-1