W3C: World Wide Web Consortium
The World Wide Web Consortium (W3C) is a non-profit organization that develops interoperable technologies (specifications, guidelines, software, and tools) to lead the Web to its full potential. W3C is a forum for information, commerce, communication, and collective understanding.
WAN: Wide Area Network
A Wide Area Network (WAN) is a computer network covering multiple distance areas, which may spread across the entire world. WANs often connect multiple smaller networks, such as local area networks (LANs) or metro area networks (MANs). The world's most popular WAN is the Internet. Some segments of the Internet are also WANs in themselves. A Wide Area Network may be privately owned or rented from a service provider, but the term usually connotes the inclusion of public (shared user) networks.
Watchdog Packet
Watchdog Packet, a feature in the NetWare-based network, is used to ensure that a client is still connected to a NetWare server. If the server has not received a packet from a client for a certain period of time, it sends that client a series of watchdog packets. If the station fails to respond to a predefined number of watchdog packets, the server concludes that the station is no longer connected and clears the connection for that station.
Watchdog Timer
Watchdog Timer, a concept in NetWare, is a timer that indicates the maximum period of time that a server will wait for a client to respond to a watchdog packet. If the timer expires, the server sends another watchdog packet (up to a set maximum).
Waveform Coding
Waveform Coding is an electrical technique used to convey binary signals. Pulse Code Modulation (PCM) is a type of waveform coding because it creates a coded form of the original voice waveform. PMV is defined in the ITU-T G.711 specification.
WBT: Web-Based Training
Web-Based Training (WBT) is an approach to do distance learning using world-wide web technologies. Web-Based Training can present multi-media live contents in a structure allowing self-directed, self-paced instruction in any topic, all independent of computer platform. Web-Based Training is an ideal vehicle for delivering training to individuals anywhere in the world at any time using web browsers that support 3-D virtual reality, animation, interactions, chat and conferencing, and real-time audio and video. An alternative electronic learning method is Computer Based Training (CBT) which typically build training courses in a CD to be installed into local PCs.
W-DCS: Wideband Digital Crossconnect System
Wideband Digital Crossconnect System(W-DCS) is an SONET DCS capable of crossconnecting DS-1 and VT1.5 signals.
WDM: Wavelength Division Multiplexing
Wavelength Division Multiplexing (WDM) is a technology that uses optical signals on different wavelengths to increase the capacity of fiber optic networks in order to handle a number of services simultaneously. WDM conversion modules have one strand of single mode fiber coming into them. They transmit and receive on the same fiber strand. The MIL-RC3xW13 transmits at 1310 nm and receives at 1550 nm. The MIL-RC3xW15 transmits at 1550 nm, and receives at 1310 nm wavelengths. One of each is required at opposite ends of the fiber to work properly.
Web
Web, also known as World Wide Web (WWW), is a client/server system based on HTML and HTTP. The Web is a global, read-write information space. Text documents, images, multimedia and many other items of information, referred to as resources, are identified by short, unique, global identifiers called Uniform Resource Identifiers (URIs) so that each can be found, accessed and cross-referenced in the simplest possible way.
Web Console
The Web Console is an user interface of a system based on web technologies that allows user to operate the system either locally or remotely across a network.
Web hosting
Web hosting refers to a type of Internet hosting service that provides individuals, organizations and users with online systems for storing information, images, video, or any content accessible via the Web. Web hosts are companies that provide space on a server they own for use by their clients as well as providing Internet connectivity, typically in a data center. Web hosts can also provide data center space and connectivity to the Internet for servers they do not own to be located in their data center.
Website
A website (or Web site) is a collection of Web pages, typically common to a particular domain name or subdomain on the World Wide Web on the Internet. The pages of a website will be accessed from a common root URL called the homepage, and usually reside on the same physical server. The URLs of the pages organise them into a hierarchy although the hyperlinks between them control how the reader perceives the overall structure and how the traffic flows between the different parts of the sites.
Well Known Ports
Well Known Ports refer to one of the classes of the TCP/UDP ports, defined by IETF IANA. The other two classes are the Registered Ports and the Dynamic and/or Private Ports. The Well Known Ports are those with a port number from 0 through 1023, which are assigned for each public application by IANA.
WEPD: Weighted Early Packet Discard
Weighted Early Packet Discard(WEPD) is a variant of Early Packet Discard (EPD) used by some ATM switches for discarding a complete AAL5 frame when a threshold condition, such as imminent congestion, is met. EPD prevents congestion that would otherwise jeopardize the capability of the switch to properly support existing connections with a guaranteed service.
WFQ: Weighted Fair Queuing
Weighted Fair Queuing (WFQ) is a congestion management algorithm that identifies conversations (in the form of traffic streams), separates packets that belong to each conversation, and ensures that capacity is shared fairly between these individual conversations. WFQ is an automatic way of stabilizing network behavior during congestion and results in increased performance and reduced retransmission. WFQ was designed to ensure that each flow has fair access to network resources and to prevent bursty flows from consuming more than its shared output bandwidth.
WHOIS system
WHOIS system is an online system for finding information about IP addresses and domain-related information. You may find out who registered a domain name and view additional registration and Web site data with the WHOIS system. A good WHOIS system can search across multiple registrar databases to give you registration information on millions of domain names with many different extensions, regardless of where they are registered.
WIC: WAN Interface Card
WAN Interface Card(WIC) is a type of Network Interface Card (NIC) that connects the system to the WAN link service provider. For example, the ATM card is a WIC.
Wildcard Mask
Wildcard Mask is a 32-bit quantity used in conjunction with an IP address to determine which bits in an IP address should be ignored when comparing that address with another IP address. A wildcard mask is specified when setting up access lists.
WinMX
WinMX is a peer-to-peer file sharing program authored by Frontcode Technologies and running on Windows operating systems. The WinMX file sharing network has been offline since September, 2005, due to a lawsuit. WinMX began its life as an OpenNAP client capable of connecting to several servers simultaneously, although Frontcode later created a proprietary protocol, termed as WinMX Peer Network Protocol (WPNP), which was used starting with WinMX 2 in May, 2001. WPNP version 2 was phased out as WinMX 3.0 and its WPNP version 3 protocol came into existence. Frontcode operates several cache servers to aid WPNP network operation.
WINS: Windows Internet Naming Service
Windows Internet Name Service (WINS) provides a distributed database for registering and querying dynamic NetBIOS names to IP address mapping in a routed network environment. WINS supports name resolution, the automated conversion of computer names to network addresses, for Windows networks. Specifically, WINS converts NetBIOS names to IP addresses on a LAN or WAN. WINS is to NetBIOS names as what Domain Name Service (DNS) is to domain names - a central mapping of host names to network addresses.
WinSock: Windows Sockets
Windows Sockets (WinSock) is a specification that defines how Windows network software should access network services, especially TCP/IP. WinSock has been the standard sockets library shipped with all versions of Windows starting with Windows 95.
Wiring Closet
Wiring Closet refers to a room containing the individual network connections for all devices in an organization or part of an organization.
Wireshark
Wireshark, previously called Ethereal, is an open source and popular network troubleshooting and packet sniffing tool. Similar to tcpdump but with a well-designed GUI and many more information sorting and filtering options, Wireshark/Ethereal allows the user to see all traffic being passed over the network by putting the network card into promiscuous mode.
WISCNET
WiscNet refers to Wisconsin's education, research and public service network. WINSNET is a non-profit membership association to help educators, students, scientists and public servants to advance teaching, learning, research and governance through network technologies.
Workgroup
In computer networking, a workgroup is a collection of computers on a local area network (LAN) that share common resources (such as printers and disks, etc.) and responsibilities. The Microsoft Windows OS supports assigning of computers to named workgroups. Macintosh networks offer a similiar capability through the use of AppleTalk zones. The Open Source software package Samba allows Unix and Linux systems to join existing Windows workgroups.
Workgroup Switching
Workgroup Switching is a method of switching that provides high-speed (100-Mbps) transparent bridging between Ethernet networks, and high-speed translational bridging between Ethernet and CDDI or FDDI.
Workstation
Workstation is a computer for an individual user. It may work as a terminal station, perhaps connected to a LAN, providing some local processing capability and storage as well as access to other workstations and shared resources.
Wormhole Routing
Wormhole routing is a system of simple routing in computer networking based on known fixed links, typically with a short address. This allows the router to quickly set up the routing of the actual message and then "bow out" of the rest of the conversation. Wormhole routing is primarily used in multiprocessor systems, notably hypercubes. In a hypercube computer each CPU is attached to several neighbours in a fixed pattern, which reduces the number of hops from one CPU to another. Each CPU is given a number (typically only 8-bit to 16-bit), which is its network address, and messages to CPUs are sent with this number in the header. When the message arrives at an intermediate CPU for forwarding, the CPU examines the header (very quickly), sets up a circuit to the next CPU, and then bows out of the conversation. In this way the messages rarely (if ever) have any delay as they travel though the network.
Wrap
Wrap refers to the action taken by an FDDI or CDDI network to recover in the event of a failure. The stations on each side of the failure reconfigure themselves, creating a single logical ring out of the primary and secondary rings.
WRED: Weighted random early detection
Weighted random early detection(WRED) is a queueing method that ensures that high-precedence traffic has lower loss rates than other traffic during times of congestion.
WWW: World Wide Web
World Wide Web (WWW or W3), also known as the web, is an Internet client/server system based on HTML and HTTP technologies. The Web is a global, read-write information space. Text documents, images, multimedia and many other items of information, referred to as resources, are identified by short, unique, global identifiers called Uniform Resource Identifiers (URIs) so that each can be found, accessed and cross-referenced in the simplest possible way.