Computer Networks

Voice mail is a centralized system for storing voice messages from telephone callers, functioning similarly to an answering machine.

Wireless adaptors are Always needed to connects to wireless networks.

A wireless adapter is a hardware device that is generally attached to a computer or other workstation device to allow it to connect to a wireless system. Before the advent of consumer devices with built-in Wi-Fi connectivity, devices required the use of wireless adapters to connect to a network.

A USB Wi-Fi adapter eliminates the need to hardwire the computer to a router or other network device. ... The adapter receives signals from a wireless router or other wireless device and translates the signal so the computer user can access the Internet any time they are in range of a Wi-Fi hotspot or wireless network.

A high-speed wireless network card that is used to access a network through a USB port on a computer or laptop. Most wireless USB LAN adapters look like small USB flash drives and usually are based on the 802.11g standard which provides a data rate up to 54-Mbps in a wireless LAN environment.

While wireless LANs refer to any local area network (LAN) that a mobile user can connect to through a wireless (radio) connection; Wi-Fi (short for "wireless fidelity") is a term for certain types of WLANs that use specifications in the 802.11 wireless protocol family. ... Differences between Wi-Fi, WLAN and WiMax.

CDMA is a multiple access method in which one channel carries all transmission simultaneously.

FDMA versus TDMA versus CDMA. This page on FDMA versus TDMA versus CDMA provides difference between FDMA,TDMA and CDMA technologies. ... FDMA- Frequency Division Multiple Access, here entire band of frequencies is divided into multiple RF channels/carriers. Each carrier is allocated to different users.

U.S. Narrowband Spread Spectrum (IS-95): CDMA/FDD. 4) Space Division Multiple access (SDMA) FDMA,TDMA and CDMA are the three major multiple access techniques that are used to share the available bandwidth in a wireless communication system.

Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel.

The word FIP stands for File Translate Protocol.

A voicemail system (also known as voice message or voice bank) is a computer-based system that allows users and subscribers to exchange personal voice messages; to select and deliver voice information; and to process transactions relating to individuals, organizations, products and services, using an ordinary telephone. The term is also used more broadly to denote any system of conveying a stored telecommunications voice messages, including using an answering machine. Most cell phone services offer voice-mail as a basic feature

Voice mail offers many communications advantages over answering machines, including the ability for users to check their messages remotely. ... The machine replays an analog or digital recording of a message, to which the user can listen by pressing a button.

WAP allows wireless mobile devices to access the Internet and its services such as the Web and e-mail.

Wireless Application Protocol (WAP) is a technical standard for accessing information over a mobile wireless network. A WAP browser is a web browser for mobile devices such as mobile phones that uses the protocol. Introduced with much hype in 1999, WAP achieved some popularity in the early 2000s, but by the 2010s it had been largely superseded by more modern standards. Most modern handset internet browsers now fully support HTML, so they do not need to use WAP markup for web page compatibility, and therefore, most are no longer able to render and display pages written in WML, WAP's markup language.

Before the introduction of WAP, mobile service providers had limited opportunities to offer interactive data services, but needed interactivity to support Internet and Web applications such as email, stock prices, news and sports headlines. The Japanese i-mode system offered another major competing wireless data protocol.

Mobile computers and personal digital assistants (PDAs) are the examples of wireless network.

Personal digital assistant:-

Personal digital assistant is a term for a small, mobile, handheld device that provides computing and information storage and retrieval capabilities for personal or business use, often for keeping schedules, calendars and address book information handy.

Mobile computers:-

Mobile computing is human computer interaction by which a computer is expected to be transported during normal usage, which allows for transmission of data, voice and video.

Wireless network:-

A wireless network is a computer network that uses wireless data connections between network nodes.

In recent years general packet radio service (GPRS) has been deployed to give IP connectivity to GSM users.

General packet radio services (GPRS) is a packet-based wireless communication service that promises data rates from 56 up to 114 Kbps and continuous connection to the internet for mobile phone and computer users. The higher data rates allow users to take part in video conferences and interact with multimedia Web sites and similar applications using mobile handheld devices as well as notebook computers.

General Packet Radio Service (GPRS) is a packet oriented mobile data standard on the 2G and 3G cellular communication network's global system for mobile communications(GSM).

A transmission in which receiver receives the data simultaneously as it is relayed is called Real-time transmission.

Real Time Transmission:- When you are sending a fax, the machine will scan the document into the memory before sending it. Sometimes, we may want to send an important document immediately, without waiting for memory transmission.

The function of a computer server is to store, retrieve and send computer files and data to other computers on a network.

Servers are computers that provide resources to other computers connected to a Network.

A network server is a computer system, which is used as the central repository of data and various programs that are shared by users in a network. If you have a computer that you're no longer using due to its slow speed, you can turn it into a network server for other computers in your household.

In computing, a server is a computer program or a device that provides functionality for other programs or devices, called "clients". This architecture is called the client–server model, and a single overall computation is distributed across multiple processes or devices.

War Driving is the term for searching for wireless networks by driving around with a device.

FDDI (Fiber Distributed Data Interface) is a standard for data transmission on fiber optic lines, known for high speed and reliability.

A wired network uses physical cables to connect devices, which generally provides higher speed and better security compared to wireless alternatives.