AirLive WN-151ARM - Manual (Page 111)

AirLive WN-151ARM User’s Manual 111
DMZ
Demilitarized Zone. When a router opens a DMZ port to an internal network device, it opens all the TCP/UDP
service ports to this particular device. The feature is used commonly for setting up H.323 VoIP or Multi-Media
servers.
DNS
A program that translates URLs to IP addresses by accessing a database maintained on a collection of
Internet servers.
Domain Name
The unique name that identifies an Internet site. Domain Names always have 2 or more parts, separated by
dots. In www.airlive.com, the "airlive.com" is the doman name.
DoS Attack
Denial of Service. A type of network attack that floods the network with useless traffic. Many DoS attacks,
such as the Ping of Death and Teardrop attacks, exploit limitations in the TCP/IP protocols.
Encryption
Encoding data to prevent it from being read by unauthorized people. The common wireless encryption
schemes are WEP, WPA, and WPA2.
ESSID (SSID)
The identification name of an 802.11 wireless network. Since wireless network has no physical boundary liked
wired Ethernet network, wireless LAN needs an identifier to distinguish one network from the other. Wireless
clients must know the SSID in order to associate with a WLAN network. Hide SSID feature disable SSID
broadcast, so users must know the correct SSID in order to join a wireless network.
Firewall
A system that secures a network and prevents access by unauthorized users. Firewalls can be software,
router, or gateway. Firewalls can prevent unrestricted access into a network, as well as restricting data from
flowing out of a network.
Firmware
The program that runs inside embedded device such as router or AP. Many network devices are firmware
upgradeable through web interface or utility program.