SMC Networks BR14VPN - annexe 3 Manual page 72

uses the challenge string and the password, and creates a Message Digest-5 (MD5) hash which is
then forwarded to the VPN server. The VPN server computes the same hash calculation and
compares the result with the hash sent by the client. If they match, the remote client is
considered an authentic user.
CSMA/CA - Carrier Sense Multiple Access with Collision Avoidance
DES - Data Encryption Standard. A cryptographic encryption algorithm that is part of many
standards.
DHCP - Dynamic Host Configuration Protocol. This protocol automatically configures the TCP/IP
settings of every computer on your home network.
DMZ - Allows a networked computer to be fully exposed to the Internet. This function is used
when the special application sensing tunnel feature is insufficient to allow an application to
function correctly.
DNS - DNS stands for Domain Name System, which allows Internet host computers to have a
domain name (such as www.smc.com) and one or more IP addresses (such as 192.34.45.8). A
DNS server keeps a database of host computers and their respective domain names and IP
addresses, so that when a domain name is requested (as in typing " www.smc.com" into your
Internet browser), the user is sent to the proper IP address. The DNS server address used by the
computers on your home network is the location of the DNS server your ISP has assigned.
DSL - DSL stands for Digital Subscriber Line. A DSL modem uses your existing phone lines to
transmit data at high speeds.
Ethernet - A standard for computer networks. Ethernet networks are connected by special cables
and hubs, and move data around at up to 10 million bits per second (Mbps).
ESS - ESS (ESS-ID, SSID) stands for "Extended Service Set". More than one BSS is configured to
become an Extended Service Set. LAN mobile users can roam between different BSSs in an ESS
(ESS-ID, SSID).
Fast Ethernet NIC - Network interface card that is in compliance with the IEEE 802.3u standard.
This card functions at the media access control (MAC) layer, using carrier sense multiple access
with collision detection (CSMA/CD).
Fixed IP – (see Static IP)
Full-Duplex - Transmitting and receiving data simultaneously. In pure digital networks, this is
achieved with two pairs of wires. In analog networks, or digital networks using carriers, it is
achieved by dividing the bandwidth of the line into two frequencies, one for sending, one for
receiving.
Hub - Central connection device for shared media in a star topology. It may add nothing to the
transmission (passive hub) or may contain electronics that regenerate signals to boost strength
as well as monitor activity (active/intelligent hub). Hubs may be added to bus topologies; for
example, a hub can turn an Ethernet network into a star topology to improve troubleshooting.
ID3 – The data fields in an MP3 that hold the artist name, track titles, album titles, genre, etc are
known as ID3 tags.
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