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Reference Manual for the 54 Mbps Wall-Plugged Wireless Range Extender WGX102
C-18
Wireless Networking Basics
202-10042-02 v1.1
Microsoft has worked with many wireless vendors to embed the WPA firmware update in the
wireless adapter driver. So, to update your Microsoft Windows wireless client, all you have to do is
obtain the new WPA-compatible driver and install the driver. The firmware is automatically
updated when the wireless network adapter driver is loaded in Windows.
Changes to Wireless Client Programs
Wireless client programs must be updated to permit the configuration of WPA authentication (and
preshared key) and the new WPA encryption algorithms (TKIP and the optional AES component).
To obtain the Microsoft WPA client program, visit the Microsoft Web site.
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202-10042-02 v1.1
Glossary
1
Glossary
Use the list below to find definitions for technical terms used in this manual.
List of Glossary Terms
10BASE-T
IEEE 802.3 specification for 10 Mbps Ethernet over twisted pair wiring.
100BASE-Tx
IEEE 802.3 specification for 100 Mbps Ethernet over twisted pair wiring.
802.1x
802.1x defines port-based, network access control used to provide authenticated network access and
automated data encryption key management.
The IEEE 802.1x draft standard offers an effective framework for authenticating and controlling user traffic
to a protected network, as well as dynamically varying encryption keys. 802.1x uses a protocol called EAP
(Extensible Authentication Protocol) and supports multiple authentication methods, such as token cards,
Kerberos, one-time passwords, certificates, and public key authentication. For details on EAP specifically,
refer to IETF's RFC 2284.
802.11a
IEEE specification for wireless networking at 54 Mbps operating in unlicensed radio bands over 5GHz.
802.11b
IEEE specification for wireless networking at 11 Mbps using direct-sequence spread-spectrum (DSSS)
technology and operating in the unlicensed radio spectrum at 2.5GHz.
802.11g
A soon to be ratified IEEE specification for wireless networking at 54 Mbps using direct-sequence
spread-spectrum (DSSS) technology and operating in the unlicensed radio spectrum at 2.5GHz. 802.11g is
backwards compatible with 802.11b.
ADSL
Short for asymmetric digital subscriber line, a technology that allows data to be sent over existing copper
telephone lines at data rates of from 1.5 to 9 Mbps when receiving data (known as the downstream rate) and
from 16 to 640 Kbps when sending data (known as the upstream rate).
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Reference Manual for the 54 Mbps Wall-Plugged Wireless Range Extender WGX102
2
Glossary
202-10042-02 v1.1
ADSL requires a special ADSL modem. ADSL is growing in popularity as more areas around the world
gain access.
AES
Advanced Encryption Standard, a symmetric 128-bit block data encryption technique.
It is an iterated block cipher with a variable block length and a variable key length. The block length and the
key length can be independently specified to 128, 192 or 256 bits.The U.S government adopted the
algorithm as its encryption technique in October 2000, replacing the DES encryption it used. AES works at
multiple network layers simultaneously.
ARP
Address Resolution Protocol, a TCP/IP protocol used to convert an IP address into a physical address (called
a DLC address), such as an Ethernet address.
A host wishing to obtain a physical address broadcasts an ARP request onto the TCP/IP network. The host
on the network that has the IP address in the request then replies with its physical hardware address. There is
also Reverse ARP (RARP) which can be used by a host to discover its IP address. In this case, the host
broadcasts its physical address and a RARP server replies with the host's IP address.
Auto Uplink
Auto Uplink
TM
technology (also called MDI/MDIX) eliminates the need to worry about crossover vs.
straight-through Ethernet cables. Auto Uplink
TM
will accommodate either type of cable to make the right
connection.
Cat 5
Category 5
unshielded twisted pair (UTP) cabling. An Ethernet network operating at 10 Mbits/second
(10BASE-T) will often tolerate low quality cables, but at 100 Mbits/second (10BASE-Tx) the cable must be
rated as Category 5, or Cat 5 or Cat V, by the Electronic Industry Association (EIA).
This rating will be printed on the cable jacket. Cat 5 cable contains eight conductors, arranged in four
twisted pairs, and terminated with an RJ45 type connector. In addition, there are restrictions on maximum
cable length for both 10 and 100 Mbits/second networks.
Denial of Service attack
DoS. A hacker attack designed to prevent your computer or network from operating or communicating.
DHCP
An Ethernet protocol specifying how a centralized DHCP server can assign network configuration
information to multiple DHCP clients. The assigned information includes IP addresses, DNS addresses, and
gateway (router) addresses.
DMZ
A Demilitarized Zone is used by a company that wants to host its own Internet services without sacrificing
unauthorized access to its private network.
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Reference Manual for the 54 Mbps Wall-Plugged Wireless Range Extender WGX102
Glossary
3
202-10042-02 v1.1
The DMZ sits between the Internet and an internal network's line of defense, usually some combination of
firewalls and bastion hosts. Typically, the DMZ contains devices accessible to Internet traffic, such as Web
(HTTP) servers, FTP servers, SMTP (e-mail) servers and DNS servers.
DNS
Short for Domain Name System (or Service), an Internet service that translates domain names into IP
addresses.
Because domain names are alphabetic, they're easier to remember. The Internet however, is really based on
IP addresses. Every time you use a domain name, therefore, a DNS service must translate the name into the
corresponding IP address. For example, the domain name www.example.com might translate to
198.105.232.4. The DNS system is, in fact, its own network. If one DNS server doesn't know how to
translate a particular domain name, it asks another one, and so on, until the correct IP address is returned.
Domain Name
A descriptive name for an address or group of addresses on the Internet. Domain names are of the form of a
registered entity name plus one of a number of predefined top level suffixes such as .com, .edu, .uk, etc. For
example, in the address mail.NETGEAR.com, mail is a server name and NETGEAR.com is the domain.
DoS
Short for Denial of Service. A hacker attack designed to prevent your computer or network from operating
or communicating.
DSL
Short for digital subscriber line, but is commonly used in reference to the asymmetric version of this
technology (ADSL) that allows data to be sent over existing copper telephone lines at data rates of from 1.5
to 9 Mbps when receiving data (known as the downstream rate) and from 16 to 640 Kbps when sending data
(known as the upstream rate).
ADSL requires a special ADSL modem. ADSL is growing in popularity as more areas around the world
gain access.
DSLAM
DSL Access Multiplexor. The piece of equipment at the telephone company central office that provides the
ADSL signal.
Dynamic Host Configuration Protocol
DHCP. An Ethernet protocol specifying how a centralized DHCP server can assign network configuration
information to multiple DHCP clients. The assigned information includes IP addresses, DNS addresses, and
gateway (router) addresses.
EAP
Extensible Authentication Protocol is a general protocol for authentication that supports multiple
authentication methods.
EAP, an extension to PPP, supports such authentication methods as token cards, Kerberos, one-time
passwords, certificates, public key authentication and smart cards. In wireless communications using EAP, a
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Reference Manual for the 54 Mbps Wall-Plugged Wireless Range Extender WGX102
4
Glossary
202-10042-02 v1.1
user requests connection to a WLAN through an AP, which then requests the identity of the user and
transmits that identity to an authentication server such as RADIUS. The server asks the AP for proof of
identity, which the AP gets from the user and then sends back to the server to complete the authentication.
EAP is defined by RFC 2284.
ESP
Encapsulating Security Payload.
ESSID
The Extended Service Set Identification (ESSID) is a thirty-two character (maximum) alphanumeric key
identifying the wireless local area network.
Gateway
A local device, usually a router, that connects hosts on a local network to other networks.
IETF
Internet Engineering Task Force. Working groups of the IETF propose standard protocols and procedures for
the Internet, which are published as RFCs (Request for Comment) at
.
An open international community of network designers, operators, vendors, and researchers concerned with
the evolution of the Internet architecture and the smooth operation of the Internet.
IP
Internet Protocol is the main internetworking protocol used in the Internet. Used in conjunction with the
Transfer Control Protocol (TCP) to form TCP/IP.
IP Address
A four-byte number uniquely defining each host on the Internet, usually written in dotted-decimal notation
with periods separating the bytes (for example, 134.177.244.57).
Ranges of addresses are assigned by Internic, an organization formed for this purpose.
IPX
Short for Internetwork Packet Exchange, a networking protocol used by the Novell NetWare operating
systems.
Like UDP/IP, IPX is a datagram protocol used for connectionless communications. Higher-level protocols,
such as SPX and NCP, are used for additional error recovery services.
ISP
Internet service provider.
Internet Protocol
The main internetworking protocol used in the Internet. Used in conjunction with the Transfer Control
Protocol (TCP) to form TCP/IP.
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