SMC Networks Barricade BR14VPN - Manual (Page 69)

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.
IP Address - IP stands for Internet Protocol. An IP address consists of a series of four
numbers separated by periods, that identifies an single, unique Internet computer host.
Example: 192.34.45.8.
IP Security - Provides IP network-layer encryption. IPSec can support large encryption
networks (such as the Internet) by using digital certificates for device authentication.
63