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

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

"VOIP - Short for Voice Over Internet Protocol, a category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls by sending voice data in packets using IP rather than by traditional circuit transmissions.

 
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

SSL (Secure Socket Layer) is a network layer security protocol which is responsible for ensuring security of data or messages in transit through http, ldap, smtp, imap or pop3 application layers and practically ensures a reliable end-to-end secure and authenticated connection between the client and the server over the open Internet.



 
by Dinesh Thakur Category: Services and Applications

IMAP stands for Interactive Mail Access Protocol and it is defined in RFC 1064. IMAP version 4 is mail access protocol that is similar to POP3. IMAP has more features an4 is more powerful and complex as compared to POP3. It allows a client to access and manipulate e-mails and mailboxes. IMAP runs on the well-known TCP port 143. IMAP was devised to overcome the limitations ofPOP3.



 
by Dinesh Thakur Category: Services and Applications

A web server is a computer programs that delivers (serves) content, such as Web pages, using the Hypertext Transfer Protocol (HTTP), over the World Wide Web. The term Web server can also refer to the computer or virtual machine running the program. In large commercial deployments, a server computer running a Web server can be rack-mounted in a server rack or cabinet with other servers to' operate a Web farm.



 
by Dinesh Thakur Category: Services and Applications

The Network News Transfer Protocol is an Internet application protocol used for transporting Usenet news articles (Netnews) between news servers and for reading and posting articles by end user client applications. Brian Kantor of the University of California, San Diego and Phil Lapsley of the University of California, Berkeley authored RFC 977, the specification for the Network News Transfer Protocol, in March 1986. Other contributors included Stan Barber from the Baylor College of Medicine and Erik Fair of Apple Computer.



 
by Dinesh Thakur Category: Services and Applications

UUCP is derived from Unix-to-Unix copy. It is a standard UNIX utility that manages the transmission of information between UNIX systems, using serial connections and regular telephone lines. The Communications package was developed at Bell Laboratory by Mile Lesk in the mid-1970s for serial communications between in-house UNIX systems.



 
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

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

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

Fragmentation occurs when you save a file containing more data than can fit into one contiguous (connected) space on the disk. When this happens, the drive splits the data into many pieces small enough to fit wherever it can find the next empty space. If that first space isn't large enough, it puts down the next piece at the next empty space, and so on and so on. This is actually quite an efficient method of making use of the entire disk, as you can imagine how quickly a disk would fill if the computer needed a contiguous space for each file.



 
by Dinesh Thakur Category: Services and Applications

A videoconference or video conference (also known as a video-teleconference) is a set of interactive telecommunication technologies which allow two or more locations to interact via two-way video and audio transmissions simultaneously. It has also been called 'visual collaboration' and is a type of groupware.

 
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

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

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

X.400 is a suite of ITU-T Recommendations that define standards for Data Communication Networks for Message Handling Systems (MHS) — more commonly known as "email".

 
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

The user generates IP packets, it is necessary to transport these IP packets to the ADSL modem. For this, we use an Ethernet frame, a PPP frame, a USB frame, or a superposition of these frames as a PPP frame encapsulated in an Ethernet frame or a PPP frame encapsulated in a USB frame.

 

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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.