by Dinesh Thakur Category: Services and Applications

E-mail is short for electronic mail, mail you can send or receive directly on your computer. Yes, with e-mail people can actually write you letters and send them to your computer, and you can turn on your computer and go pick up your mail whenever it's convenient. Many a love affair has begun through e-mail. I know. It's really fun, too. And useful, of course. E-mail can be a verb too, as in "I e-mailed my lover a letter from Lhasa."



 
by Dinesh Thakur Category: Services and Applications

CompuServe (whose formal name is CompuServe Information Services, or CIS for short and sometimes CI$ for a statement) is a commercial online service that you can access through your modem. It has an incredible array of forums (sections devoted to particular interests), conferences, facilities for uploading and downloading information, and all the other benefits a powerful online service offers.



 
by Dinesh Thakur Category: Services and Applications

The application of FILE COMPRESSION algorithms to digital sound files to reduce their required storage space and hence their download time over low-bandwidth communication links such as the Internet. Lossless audio compression can be achieved using exactly the same algorithms as for any other kind of digital data. However, as with visual images, compression is most effective when some quality is sacrificed (so-called LOSSY compression methods), and the most widely used compressed formats such as MP3 and REAL AUDIO use such methods to achieve compression ratios on the order of 60:1 to 80:1.

 
by Dinesh Thakur Category: Services and Applications

A service provided on many Internet servers that permits a casual visitor to download files using the FTP file transfer protocol without needing to possess a named account or password. The user merely logs in under the name 'anonymous' or 'ftp' and uses his/her email address as the PASSWORD, and is then granted access to a restricted set of directories that have been reserved for public access (and which are typically separated from those used by the local users).



 
by Dinesh Thakur Category: Services and Applications

4G is a packet-switched technology that uses bandwidth much more efficiently, allowing each user's packets to complete for available bandwidth, and billing users for the amount of data transmitted. It also solves the non-standardization problems associated with 3G networks for voice, video, and data transmission.

 
by Dinesh Thakur Category: Services and Applications

File transfer protocol is the way files are transferred from the server to the client across the network.

As good as Browsers are at reading web pages they are not so good when it comes to transferring large files over the Internet. For this FTP or File Transfer Protocol is needed.



 
by Dinesh Thakur Category: Services and Applications

Initially developed by Sun Microsystems Incorporated, the NFS provides on-line shared file access that is transparent and integrated; many TCP/IP sites use NFS to interconnect their computer's file systems. From the user's perspective, NFS is almost invisible. A user can execute an arbitrary application program and use arbitrary files for input or output. The file names themselves do not show whether the files are local or remote. Network File System allows the user to access, read, and modify a file on a remote device, (on the same network, usually), as if it were on the client machine.



 
by Dinesh Thakur Category: Services and Applications

The Simple Network Management Protocol (SNMP) is a framework for managing devices in an internet using the TCP/IP protocol suite. It provides a set of fundamental operations for monitoring and maintaining an internet.



 
by Dinesh Thakur Category: Services and Applications

What is http: HTTP full form HyperText Transfer Protocol used mainly to access data on the World Wide Web. HTTP is a Server and Client communication Protocol, which is primarily set of rules for formating and transferring webpage data (text, images, video and Multimedia files) over the world wide web. This is the Protocol used to create communication between Web Servers and Web Users. HTTP is an application layer Protocol that works on the top of the TCP/IP suite of Protocols.

 
by Dinesh Thakur Category: Services and Applications

The generic GSM network architecture is composed of three subsystems as the Radio Subsystem (RSS), the network and Switching Subsystem (NSS) and the Operation Subsystem (OSS). The subscriber carries the Mobile Station, which is part or RSS.

 
by Dinesh Thakur Category: Services and Applications

In the beginning around 1980s, analog cellular telephone systems were developing in Europe and each country was developing its own system and thus making them confined within their country boundaries. Later on, the need for an European public land mobile system was realized. In 1982, the Conference of European Posts and Telegraphs (CEPT),formed a study group called the Groupe Special Mobile (GSM) to develop a pan-European standard With the objectives of providing good subjective speech quality, support for international roaming etc. The proposed system was expected to meet certain criteria as mentioned below:

 
by Dinesh Thakur Category: Services and Applications

A cellular mobile communications system consists of a large number of low power wireless transmitters to create cells. These cells cover a certain area and typically called as base station. Depending upon the power level the size of cells can be decided. In this way, the radii of a cell may vary from tens of meters to tens of kilometers in a building to a city respectively.

 
by Dinesh Thakur Category: Services and Applications

Cellular radio has other popular names as cellular mobile or mobile phone. Radio is basically a device, which uses receiver and transmitter. Wireless communication can also be carried out without using radio. The interference caused by high power line to radio transmission is also an example of wireless communication though it is termed as noise. Inductive and conductive circuits and devices can communicate wirelessly for limited distance with less reliability and implementation problem. Therefore, these techniques cannot be termed as radio transmission.

 
by Dinesh Thakur Category: Services and Applications

This section presents an overview of the most common protocols used for TCP/IP communication. The discussion focuses on the nature of these applications and the purpose they serve.



 
by Dinesh Thakur Category: Services and Applications

• Trivial file transfer protocol (TFTP) is suited for those applications that do not require complex procedures of FTP and do not have enough resources (RAM, ROM) for this purpose.

• Typical applications of TFTP include loading the image on diskless machine and upgrading the operating system in network devices such as routers.



 
by Dinesh Thakur Category: Services and Applications

• Cookie is a special header sent by the server to the client or browser.

• Cookie introduces session information.



 
by Dinesh Thakur Category: Services and Applications

The WWW is the brainchild of Tim Berners Lee a CERN who had the idea of creating an electronic web of research information. The web is currently the fastest growing Internet information system, with new resources being added regularly. The web relies on a set of protocols, conventions and software to operate. The web is a distributed system of delivering linked documents over the Internet.



 
by Dinesh Thakur Category: Services and Applications

A Cable Modem provides bi-directional data communication via radio frequency channels on a cable television (CATV) infrastructure. Cable modems are primarily used to deliver broadband Internet access in the form of cable Internet, taking advantage of the high bandwidth of a cable television network.

 
by Dinesh Thakur Category: Services and Applications

ADSL:-Asymmetric Digital Subscriber Line (ADSL): A BROADBAND digital telecommunications (xDSL) technology that can operate over existing copper telephone lines, and is one of the technologies vying to replace ISDN. ADSL uses an upgraded phone line, all-digital technology, and supports simultaneous Internet browsing and phone use. ADSL is a much newer technology.

 
by Dinesh Thakur Category: Services and Applications

TELNET : TELNET (TELecommunication NETwork) is a network protocol used on the Internet or local area network (LAN) connections. It was developed in 1969 beginning with RFC 15 and standardized as IETF STD 8, one of the first Internet standards.



 

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About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.