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Appendix E: Glossary
Public 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 ISPs.
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 and into range of different base station service areas. IEEE 802.11f
E-23
Psion Teklogix 9160 G2 Wireless Gateway User Manual
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