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Appendix E: Glossary
LAN
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. Ethernet is the most common
technology implementing a LAN.
Wireless Ethernet (802.11) is another very popular LAN technology (also see WLAN).
LDAP
The Lightweight Directory Access Protocol (LDAP) is a protocol for accessing on-
line directory services. It is used to provide an authentication mechanism. It is based
on the X.500 standard, but less complex.
Lease Time
The Lease Time specifies the period of time the DHCP Server gives its clients an IP
Address and other required information. When the lease expires, the client must
request a new lease. If the lease is set to a short span, you can update your network
information and propagate the information provided to the clients in a timely
manner.
LLC
The Logical Link Control (LLC) layer controls frame synchronization, flow control,
and error checking. It is a higher level protocol over the PHY layer, working in
conjunction with the MAC layer.
E-17
Psion Teklogix 9160 G2 Wireless Gateway User Manual
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