User's Manual

Appendix A Hayes Commands
Page 37 © February 2005
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.
SSL Commonly used encryption scheme used by many online retail and banking
sites to protect the financial integrity of transactions. When an SSL session
begins, the server sends its public key to the browser. The browser then
sends a randomly generated secret key back to the server in order to have a
secret key exchange for that session
Subnetwork or
Subnet
Found in larger networks, these smaller networks are used to simplify
addressing between numerous computers. Subnets connect to the central
network through a router, hub or gateway. Each individual wireless LAN
will probably use the same subnet for all the local computers it talks to.
Switch A type of hub that efficiently controls the way multiple devices use the same
network so that each can operate at optimal performance. A switch acts as a