Reference Guide

575 | Terminology Dell Networking W-Series Instant 6.4.0.2-4.1 | CLI Reference Guide
Term Definition
fixed wireless Wireless devices or systems in fixed locations such as homes and offices.
Fixed wireless devices usually derive their electrical power from the utility
mains, unlike mobile wireless or portable wireless which tend to be
battery-powered. Although mobile and portable systems can be used in
fixed locations, efficiency and bandwidth are compromised compared with
fixed systems.
frequency allocation Use of radio frequency spectrum regulated by governments.
frequency spectrum Part of the electromagnetic spectrum.
hotspot A WLAN node that provides Internet connection and virtual private
network (VPN) access from a given location. A business traveler, for
example, with a laptop equipped for Wi-Fi can look up a local hot spot,
contact it, and get connected through its network to reach the Internet and
their own company remotely with a secure connection. Increasingly, public
places, such as airports, hotels, and coffee shops are providing free
wireless access for customers.
IEEE 802.11 standards The IEEE 802.11 is a set of standards that are categorized based on the
radio wave frequency and the data transfer rate.
POE Power over Ethernet (PoE) is a method of delivering power on the same
physical Ethernet wire used for data communication. Power for devices is
provided in one of the following two ways:
l Endspan— The switch that an AP is connected for power supply.
l Midspan— A device can sit between the switch and APs
The choice of endspan or midspan depends on the capabilities of the
switch to which the W-IAP is connected. Typically if a switch is in place
and does not support PoE, midspan power injectors are used.
PPPoE Point-to-Point Protocol over Ethernet (PPPoE) is a method of connecting
to the Internet typically used with DSL services where the client connects
to the DSL modem.
QoS Quality of Service (QoS) refers to the capability of a network to provide
better service to a specific network traffic over various technologies.
RF Radio Frequency (RF) refers to the portion of electromagnetic spectrum in
which electromagnetic waves are generated by feeding alternating current
to an antenna.
TACACS Family of protocols that handle remote authentication and related services
for network access control through a centralized server.
TACACS+ Derived from TACACS but an entirely new and separate protocol to
handle AAA services. TACACS+ uses TCP and is not compatible with
TACACS. Because it encrypts password, username, authorization, and
accounting, it is less vulnerable than RADIUS.
VPN A Virtual Private Network (VPN) network that uses a public
telecommunication infrastructure, such as the Internet, to provide remote
offices or individual users with secure access to their organization's
network. A VPN ensures privacy through security procedures and
tunneling protocols such as the Layer Two Tunneling Protocol (L2TP ).
Data is encrypted at the sending end and decrypted at the receiving end.
Table 12: List of Terms