Nexxt Viking 150 User Manual page 90

Nexxt Solutions – Wireless-N 3G router
Appendix B: Glossary
802.11n - 802.11n builds upon previous 802.11 standards by adding MIMO (multiple-
•
input multiple-output). MIMO uses multiple transmitter and receiver antennas to allow
for increased data throughput via spatial multiplexing and increased range by exploit-
ing the spatial diversity, perhaps through coding schemes like Alamouti coding. The
Enhanced Wireless Consortium (EWC) [3] was formed to help accelerate the IEEE
802.11n development process and promote a technology specification for interoperabil-
ity of next-generation wireless local area networking (WLAN) products.
• 802.11b - The 802.11b standard specifies a wireless networking at 11 Mbps using
direct-sequence spread-spectrum (DSSS) technology and operating in the unlicensed ra-
dio spectrum at 2.4GHz, and WEP encryption for security. 802.11b networks are also
referred to as Wi-Fi networks.
802.11g - Specification for wireless networking at 54 Mbps using direct-sequence
•
spread-spectrum (DSSS) technology, using OFDM modulation and operating in the
unlicensed radio spectrum at 2.4GHz, and backward compatibility with IEEE 802.11b
devices, and WEP encryption for security.
• DDNS (Dynamic Domain Name System) - The capability of assigning a fixed host and
domain name to a dynamic Internet IP Address.
• DHCP (Dynamic Host Configuration Protocol) - A protocol that automatically configure
the TCP/IP parameters for the all the PC(s) that are connected to a DHCP server.
DMZ (Demilitarized Zone) - A Demilitarized Zone allows one local host to be exposed to
•
the Internet for a special-purpose service such as Internet gaming or videoconferencing.
• DNS (Domain Name System) - An Internet Service that translates the names of web-
sites into IP addresses.
• Domain Name - A descriptive name for an address or group of addresses on
the Internet.
• DSL (Digital Subscriber Line) - A technology that allows data to be sent or received
over existing traditional phone lines.
ISP (Internet Service Provider) - A company that provides access to the Internet.
•
• MTU (Maximum Transmission Unit) - The size in bytes of the largest packet that can be
transmitted.
NAT (Network Address Translation) - NAT technology translates IP addresses of a local
•
area network to a different IP address for the Internet.
PPPoE (Point to Point Protocol over Ethernet) - PPPoE is a protocol for connecting
•
remote hosts to the Internet over an always-on connection by simulating a dial-up con-
nection.
SSID - A Service Set Identification is a thirty-two character (maximum) alphanumeric key
•
identifying a wireless local area network. For the wireless devices in a network to com-
municate with each other, all devices must be configured with the same SSID. This is
typically the configuration parameter for a wireless PC card. It corresponds to the ESSID
in the wireless Access Point and to the wireless network name.
WEP (Wired Equivalent Privacy) - A data privacy mechanism based on a 64-bit or 128-
•
bit or 152-bit shared key algorithm, as described in the IEEE 802.11 standard.
• Wi-Fi - A trade name for the 802.11b wireless networking standard, given by the
Wireless Ethernet Compatibility Alliance (WECA, see http://www.wi-fi.net), an industry
standards group promoting interoperability among 802.11b devices.
• WLAN (Wireless Local Area Network) - A group of computers and associated devices
communicate with each other wirelessly, in which network serving users are limited in a
local area.
90