SMC Networks 7004VBR - annexe 2 Manual page 35

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.
ISAKMP - Internet Security Association and Key Manangement Protocol. The basis for IKE.
ISP - Internet Service Provider. An ISP is a business that provides connectivity to the Internet for
individuals and other businesses or organizations.
JPEG – Joint Photographic Experts Group. JPEG is a standard for compressing still images and it
provides compression with ratios up to 100:1. File extensions are .JPG or .JPEG.
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