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Appendix D: Glossary
ISP
ISP
An Internet Service Provider (ISP) is a company that provides access to the Internet to
individuals and companies. It may provide related services such as virtual hosting, network
consulting, Web design, etc.
J
Jitter
Jitter is the difference between the latency (or delay) in packet transmission from one node
to another across a network. If packets are not transmitted at a consistent rate (including
Latency),
transmission rates can cause distortion in VoIP and streaming media.
reduce jitter along with other factors that can impact network performance.
L
Latency
Latency, also known as delay, is the amount of time it takes to transmit a
to receiver. Latency can occur when data is transmitted from the access point to a client and
vice versa. It can also occur when data is transmitted from access point to the Internet and
vice versa. Latency is caused by fixed network factors such as the time it takes to encode and
decode a packet, and also by variable network factors such as a busy or overloaded network.
QoS
features are designed to minimize latency for high priority network traffic.
LAN
A Local Area Network (LAN) is a communications network covering a limited area, for
example, the computers in your home that you want to network together or a couple of
floors in a building. A LAN connects multiple computers and other network devices such as
storage and printers.
Wireless Ethernet (802.11) is another very popular LAN technology (also see WLAN).
D-60
Psion Teklogix 9160 G2 Wireless Gateway User Manual
QoS
for some types of data can be affected. For example, inconsistent
Ethernet
is the most common technology implementing a LAN.
QoS
is designed to
Packet
from sender
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