Nortel Networks 2300 manual Spanning Tree Protocol See STP

Glossary 627

security ACL Security access control list. An ordered list of rules to control access to and from a network by determining whether to forward or filter packets that are entering or exiting it. Associating a security ACL with a particular user, port, virtual LAN (VLAN), or virtual port on a WLAN—Security Switch (WSS) switch controls the network traffic to or from the user, port, VLAN, or virtual port. The rules in an ACL are known as access control entries (ACEs). See also ACE.

seed (1) An input to a pseudorandom number generator (PRNG), that is generally the combination of two or more inputs. (2) The WLAN—Security Switch (WSS) switch that distributes information to all the WSS switches in a Mobility Domain™ group.

SentrySweep™ A radio frequency (RF) detection sweep that runs continuously on the disabled radios in a Mobility Domain™ group. See also RF detection sweep.

session A related set of communication transactions between an authenticated user (client) and the specific station to which the client is bound.

Session Initialization Protocol See SIP.

service set identifier See SSID.

SHA Secure hashing algorithm. A one-way hashing algorithm used in many authentication algorithms and also for key derivation in many algorithms. A SHA produces a 160-bit hash.

shared secret A static key distributed by an out-of-band mechanism to both the sender and receiver. Also known as a shared key or preshared key (PSK), a shared secret is used as input to a one-way hash algorithm. When a shared secret is used for authentication, if the hash output of both sender and receiver is the same, they share the same secret and are authenticated. A shared secret can also be used for encryption key generation and key derivation.

SIP Session Initialization Protocol. A signaling protocol that establishes real-time calls and conferences over IP networks.

Spanning Tree Protocol See STP.

SSH Secure Shell protocol. A Telnet-like protocol that establishes an encrypted session.

SSID Service set identifier. The unique name shared among all computers and other devices in a wireless LAN (WLAN).

SSL Secure Sockets Layer protocol. A protocol developed by Netscape for managing the security of message transmission over the Internet. SSL has been succeeded by Transport Layer Security (TLS) protocol, which is based on SSL. The sockets part of the term refers to the sockets method of passing data back and forth between a client and a server program in a network or between program layers in the same computer. SSL uses the public-and-private key encryption system from RSA Data Security, Inc., which also includes the use of a digital certificate. See also HTTPS; TLS.

station Any device with a media access control (MAC) address and a Physical layer (PHY) interface to the wireless medium that comply with the standards for all IEEE 802 networks. Wireless clients and Access Point (AP) access points are stations in a Nortel WLAN 2300 System.

STP Spanning Tree Protocol. A link management protocol, defined in the IEEE 802.1D standard, that provides path redundancy while preventing undesirable loops in a network. STP is also known as Spanning Tree Bridge Protocol.

Nortel WLAN Security Switch 2300 Series Configuration Guide