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D -66 Psion Teklogix 9160 G2 Wireless Gateway User Manual
Appendix D: Glossary
PSK
PSK
Pre-Shared Key (PSK), see Shared Key .
Public Key
A public key is used in public key cryptography to encrypt a message which can only be
decrypted with the recipient's private or secret key. Public key encryption is also called
asymmetric encryption, because it uses two keys, or Diffie-Hellman encryption. Also see
Shared Key .
Q
QoS
Quality of Service (QoS) defines the performance properties of a network service, including
guaranteed throughput, transit delay, and priority queues. QoS is designed to minimize
Latency , Jitter , Packet Loss , and network congestion, and provide a way of allocating
dedicated bandwidth for high priority network traffic.
The IEEE standard for implementing QoS on wireless networks is currently in-work by the
802.11e task group. A subset of 802.11e features is described in the WMM specification.
R
RADIUS
The Remote Authentication Dial-In User Service (RADIUS) provides an authentication and
accounting system. It is a popular authentication mechanism for many ISP s.
RC4
A symmetric stream cipher provided by
RSA Security
. It is a variable key-size stream cipher
with byte-oriented operations. It allows keys up to 2048 bits in length.
Roaming
In IEEE 802.11 parlance, roaming clients are mobile client stations or devices on a wireless
network ( WLAN ) that require use of more than one Access Point (AP) as they move out of