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Reference Manual for the 54 Mbps Wall-Plugged Wireless Range Extender WGX102
Glossary
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202-10042-02 v1.1
LAN
A communications network serving users within a limited area, such as one floor of a building.
LDAP
A set of protocols for accessing information directories.
Lightweight Directory Access Protocol
LDAP. A set of protocols for accessing information directories.
LDAP is based on the standards contained within the X.500 standard, but is significantly simpler. And
unlike X.500, LDAP supports TCP/IP, which is necessary for any type of Internet access. Because it's a
simpler version of X.500, LDAP is sometimes called
X.500-lite.
local area network
LAN. A communications network serving users within a limited area, such as one floor of a building.
A LAN typically connects multiple personal computers and shared network devices such as storage and
printers. Although many technologies exist to implement a LAN, Ethernet is the most common for
connecting personal computers.
MAC address
The Media Access Control address is a unique 48-bit hardware address assigned to every network interface
card. Usually written in the form 01:23:45:67:89:ab.
Mbps
Megabits per second.
MDI/MDIX
In cable wiring, the concept of transmit and receive are from the perspective of the computer, which is wired
as a Media Dependant Interface (MDI). In MDI wiring, a computer transmits on pins 1 and 2. At the hub,
switch, router, or access point, the perspective is reversed, and the hub receives on pins 1 and 2. This wiring
is referred to as Media Dependant Interface - Crossover (MDI-X). See also AES.
Maximum Receive Unit
MRU. The size in bytes of the largest packet that can be sent or received.
Maximum Transmit Unit
MTU. The size in bytes of the largest packet that can be sent or received.
Most Significant Bit or Most Significant Byte
MSB. The portion of a number, address, or field that is farthest left when written as a single number in
conventional hexadecimal ordinary notation. The part of the number having the most value.
MRU
Maximum Receive Unit. The size in bytes of the largest packet that can be sent or received.
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Glossary
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MSB
Most Significant Bit or Byte. The portion of a number, address, or field that is farthest left when written as a
single number in conventional hexadecimal ordinary notation. The part of the number having the most
value.
MTU
Maximum Transmit Unit. The size in bytes of the largest packet that can be sent or received.
NAT
A technique by which several hosts share a single IP address for access to the Internet.
NetBIOS
The Network Basic Input Output System is an application programming interface (API) for sharing services
and information on local-area networks (LANs).
Provides for communication between stations of a network where each station is given a name. These names
are alphanumeric names, up to 16 characters in length.
Network Address Translation
NAT. A technique by which several hosts share a single IP address for access to the Internet.
NIC
Network Interface Card. An adapter in a computer which provides connectivity to a network.
NID
Network Interface Device. The point of demarcation, where the telephone line comes into the house.
packet
A block of information sent over a network. A packet typically contains a source and destination network
address, some protocol and length information, a block of data, and a checksum.
Perfect Forward Secrecy
Perfect Forward Secrecy (PFS) provides additional security by means of a Diffie-Hellman shared secret
value. With PFS, if one key is compromised, previous and subsequent keys are secure because they are not
derived from previous keys.
PKIX
PKIX. The most widely used standard for defining digital certificates.
Point-to-Point Protocol
PPP. A protocol allowing a computer using TCP/IP to connect directly to the Internet.
PPP
Point-to-Point Protocol. A protocol allowing a computer using TCP/IP to connect directly to the Internet.
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Reference Manual for the 54 Mbps Wall-Plugged Wireless Range Extender WGX102
Glossary
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PPPoA
PPP over ATM is a protocol for connecting remote hosts to the Internet over an always-on connection by
simulating a dial-up connection.
PPPoE
PPP over Ethernet is a protocol for connecting remote hosts to the Internet over an always-on connection by
simulating a dial-up connection.
PPP over ATM
PPPoA. PPP over ATM is a protocol for connecting remote hosts to the Internet over an always-on
connection by simulating a dial-up connection.
PPP over Ethernet
PPPoE. PPP over Ethernet is a protocol for connecting remote hosts to the Internet over an always-on
connection by simulating a dial-up connection.
PPTP
Point-to-Point Tunneling Protocol. A method for establishing a virtual private network (VPN) by embedding
Microsoft’s network protocol into Internet packets.
PSTN
Public Switched Telephone Network.
RADIUS
Short for Remote Authentication Dial-In User Service, RADIUS is an authentication system.
Using RADIUS, you must enter your user name and password before gaining access to a network. This
information is passed to a RADIUS server, which checks that the information is correct, and then authorizes
access. Though not an official standard, the RADIUS specification is maintained by a working group of the
IETF.
RFC
Request For Comment. Refers to documents published by the Internet Engineering Task Force (IETF)
proposing standard protocols and procedures for the Internet. RFCs can be found at
.
RIP
A protocol in which routers periodically exchange information with one another so that they can determine
minimum distance paths between sources and destinations.
router
A device that forwards data between networks. An IP router forwards data based on IP source and
destination addresses.
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Routing Information Protocol
RIP. A protocol in which routers periodically exchange information with one another so that they can
determine minimum distance paths between sources and destinations.
SSID
A Service Set Identification is a thirty-two character (maximum) alphanumeric key identifying a wireless
local area network. For the wireless devices in a network to communicate with each other, all devices must
be configured with the same SSID.
This is typically the configuration parameter for a wireless PC card. It corresponds to the ESSID in the
wireless Access Point and to the wireless network name.
See also
Wireless Network Name and ESSID.
Subnet Mask
A mask used to determine what subnet an IP address belongs to. Subnetting enables a network administrator
to further divide an IP address into two or more subnets.
An IP address has two components, the network address and the host address. For example, consider the IP
address 150.215.017.009. Assuming this is part of a Class B network, the first two numbers (150.215)
represent the Class B network address, and the second two numbers (017.009) identify a particular host on
this network.
Subnetting enables the network administrator to further divide the host part of the address into two or more
subnets. In this case, a part of the host address is reserved to identify the particular subnet. This is easier to
see if we show the IP address in binary format. The full address is: 10010110.11010111.00010001.00001001
The Class B network part is: 10010110.11010111
and the host address is 00010001.00001001
If this network is divided into 14 subnets, however, then the first 4 bits of the host address (0001) are
reserved for identifying the subnet.
The subnet mask is the network address plus the bits reserved for identifying the subnetwork. (By
convention, the bits for the network address are all set to 1, though it would also work if the bits were set
exactly as in the network address.) In this case, therefore, the subnet mask would be
11111111.11111111.11110000.00000000. It's called a mask because it can be used to identify the subnet to
which an IP address belongs by performing a bitwise AND operation on the mask and the IP address. The
result is the subnetwork address: Subnet Mask 255.255.240.000
11111111.11111111.11110000.00000000
IP Address 150.215.017.009
10010110.11010111.00010001.00001001
Subnet Address 150.215.016.000
10010110.11010111.00010000.00000000
The subnet address, therefore, is 150.215.016.000.
TCP/IP
The main internetworking protocols used in the Internet. The Internet Protocol (IP) used in conjunction with
the Transfer Control Protocol (TCP) form TCP/IP.
TLS
Short for Transport Layer Security, TLS is a protocol that guarantees privacy and data integrity between
client/server applications communicating over the Internet.
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Glossary
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The TLS protocol is made up of two layers. The TLS Record Protocol ensures that a connection is private by
using symmetric data encryption and ensures that the connection is reliable. The second TLS layer is the
TLS Handshake Protocol, which allows authentication between the server and client and the negotiation of
an encryption algorithm and cryptographic keys before data is transmitted or received. Based on Netscape’s
SSL 3.0, TLS supercedes and is an extension of SSL. TLS and SSL are not interoperable.
Universal Plug and Play
UPnP. A networking architecture that provides compatibility among networking technology. UPnP
compliant routers provide broadband users at home and small businesses with a seamless way to participate
in online games, videoconferencing and other peer-to-peer services.
UTP
Unshielded twisted pair is the cable used by 10BASE-T and 100BASE-Tx Ethernet networks.
WAN
Wide Area Network. A long distance link used to extend or connect remotely located local area networks.
The Internet is a large WAN.
WEB Proxy Server
A Web proxy server is a specialized HTTP server that allows clients access to the Internet from behind a
firewall.
The proxy server listens for requests from clients within the firewall and forwards these requests to remote
Internet servers outside the firewall. The proxy server reads responses from the external servers and then
sends them to internal client clients.
WEP
Wired Equivalent Privacy is a data encryption protocol for 802.11b wireless networks.
All wireless nodes and access points on the network are configured with a 64-bit or 128-bit Shared Key for
data encryption.
wide area network
WAN. A long distance link used to extend or connect remotely located local area networks. The Internet is a
large WAN.
Wi-Fi
A trade name for the 802.11b wireless networking standard, given by the Wireless Ethernet Compatibility
Alliance (WECA, see
), an industry standards group promoting interoperability among
802.11b devices.
Windows Internet Naming Service
WINS. Windows Internet Naming Service is a server process for resolving Windows-based computer names
to IP addresses.
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