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280 AT-TQ2403 - Management Software - User's Guide
The Document Object Model (DOM) is an interface that allows programs and scripts to dynamically access
and update the content, structure, and style of documents. The DOM allows you to model the objects in an
HTML or XML document (text, links, images, tables), defining the attributes of each object and how they can
be manipulated.
Further details about the DOM can be found at the W3C.
DTIM
All Beacon frames include a Traffic Information Map information element (TIM IE). In some beacon frames,
the TIM IE includes a Delivery Traffic Information Map (DTIM) message. These special DTIM beacons are
sent at an interval specified in the DTIM period. Another way of expressing this is:
Every xth TIM IE is DTIM (where X = DTIM Period)
The DTIM beacon alerts the clients that multicast and broadcast packets buffered at the AP will be
transmitted immediately after the transmission of this beacon frame.
Dynamic IP Address
See IP Address.
E
EAP
The Extensible Authentication Protocol (EAP) is an authentication protocol that supports multiple methods,
such as token cards, Kerberos, one-time passwords, certificates, public key authentication, and smart cards.
Variations on EAP include EAP Cisco Wireless (LEAP), Protected EAP (PEAP), EAP-TLS, and EAP Tunnelled
TLS (EAP-TTLS).
EDCA
Enhanced Distributed Channel Access is an extension of DCF. EDCA, a component of the IEEE Wireless
Multimedia (WMM) standard, provides prioritized access to the wireless medium.
ESS
An Extended Service Set (ESS) is an Infrastructure Mode Wireless Networking Framework with multiple
access points, forming a single subnetwork that can support more clients than a basic service set (BSS). Each
access point supports a number of wireless stations, providing broader wireless coverage for a large space,
for example, an office.
Ethernet
thernet is a local-area network (LAN) architecture supporting data transfer rates of 10 Mbps to 1 Gbps.
The Ethernet specification is the basis for the IEEE 802.3 standard, which specifies the physical and lower
software layers. It uses the CSMA/CA access method to handle simultaneous demands.
Ethernet supports data rates of 10 Mbps, Fast Ethernet supports 100 Mbps, and Gigabit Ethernet supports
1 Gbps. Its cables are classified as "XbaseY", where X is the data rate in Mbps and Y is the category of cabling.
The original cable was 10base5 (Thicknet or "Yellow Cable"). Some others are 10base2 (Cheapernet),
10baseT (Twisted Pair), and 100baseT (Fast Ethernet). The latter two are commonly supplied using CAT5
cabling with RJ-45 connectors. There is also 1000baseT (Gigabit Ethernet).
ERP