Westermo RM-80 - Manual (Page 54)

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MAC Address A MAC address, short for Media Access Control address, is a
unique code assigned to most forms of networking hardware. The
address is permanently assigned to the hardware, so limiting a
wireless network’s access to hardware -- such as wireless cards -- is
a security feature employed by closed wireless networks. But an
experienced hacker -- armed with the proper tools -- can still figure
out an authorized MAC address, masquerade as a legitimate address
and access a closed network.
Every wireless 802.11 device has its own specific MAC address hard-
coded into it. This unique identifier can be used to provide security
for wireless networks. When a network uses a MAC table, only the
802.11 radios that have had their MAC addresses added to that
network’s MAC table will be able to get onto the network.
NAT Network Address Translation: A network capability that enables a
houseful of computers to dynamically share a single incoming IP
address from a dial-up, cable or xDSL connection. NAT takes the
single incoming IP address and creates new IP address for each client
computer on the network.
NIC A type of PC adapter card that either works without wires (Wi-Fi)
or attaches to a network cable to provide two-way communication
between the computer and network devices such as a hub or switch.
Most office wired NICs operate at 10 Mbps (Ethernet), 100 Mbps
(Fast Ethernet) or 10/100 Mbps dual speed. High-speed Gigabit and
10 Gigabit NIC cards are also available. See PC Card.
Proxy server Used in larger companies and organizations to improve network
operations and security, a proxy server is able to prevent direct
communication between two or more networks. The proxy server
forwards allowable data requests to remote servers and/or responds
to data requests directly from stored remote server data.
RJ-45 Standard connectors used in Ethernet networks. Even though
they look very similar to standard RJ-11 telephone connectors,
RJ-45 connectors can have up to eight wires, whereas telephone
connectors have only four.
Server A computer that provides its resources to other computers and
devices on a network. These include print servers, Internet servers
and data servers. A server can also be combined with a hub or
router.
Site survey The process whereby a wireless network installer inspects a location
prior to putting in a wireless network. Site surveys are used to
identify the radio- and client-use properties of a facility so that access
points can be optimally placed.