A FQDN consists of a host, a second-level domain and top-level domain.
For example, www.ecomputernotes.com is a FQDN. www is the host; area is the tertiary sector; ecomputernotes is the second level domain is .com is the top field.
By Dinesh Thakur
A FQDN consists of a host, a second-level domain and top-level domain.
For example, www.ecomputernotes.com is a FQDN. www is the host; area is the tertiary sector; ecomputernotes is the second level domain is .com is the top field.
By Dinesh Thakur
A CNAME is simply an alias for a host record. The CNAMEs allow you to have more than one DNS name for each host record. The CNAME points to the parameter A. So if you change your IP address in the parameter A, all your CNAME records follow the new IP address of the parameter A. [Read more…] about What is a CNAME?
By Dinesh Thakur
The IEEE 802.22 Working Group started its activities in 2004 with the aim of achieving a regional radio network. The frequency bands used are primarily the digital dividend, that is to say the frequency bands that will be freed when television will fully and finally digital. In France, it is planned for 2010. In the rest of the world, this should be spread between now and 2015. [Read more…] about What is WRAN?
By Dinesh Thakur
Today, hundreds of major companies market TCP / IP products. It is they who decide the placing on the market of new technology, not the researchers, as originally. The governance of the Internet has been completely redesigned in the late 2000s Authority over the Internet central coordination functions exercised by IANA (Internet Assigned Numbers Authority). In fact, it’s Jon Postel who held that office until his death in 1998. Today it is ICANN performs that function. [Read more…] about Standardization of IP Networks
By Dinesh Thakur
In the late 1960s, the US Department of Defense decides to make an extensive network from many small networks, all different, which begin to abound everywhere in North America. We had to find a way for these networks to coexist and give them outdoor visibility, the same for all users. Hence, InterNetwork (interline), abbreviated as the Internet, data this network of networks. [Read more…] about Internet Architecture
By Dinesh Thakur
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. [Read more…] about What are the ADSL Protocols?
By Dinesh Thakur
The metal lines have been used for decades for the transport of the telephone speech with a bandwidth of 3200 Hz. They are used today for transport, at the same time as the telephone, broadband data packets. The xDSL environment is devoted to terrestrial broadband connections, we give here in an introduction. [Read more…] about What is xDSL(Digital subscriber line)?
By Dinesh Thakur
File sharing is when a person on one computer can use the files from another computer while the file is still on the other computer. The computers that want to share files with each other must be connected via a network. [Read more…] about What is File Sharing?
By Dinesh Thakur
In a computer network,the file server is the computer responsible for storing and retrieving the files used by all the computers connected to the network. [Read more…] about What is File Server?
By Dinesh Thakur
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.” [Read more…] about What is email?
By Dinesh Thakur
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. [Read more…] about What is CompuServe?
By Dinesh Thakur
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. [Read more…] about What is Audio Compression?
By Dinesh Thakur
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
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. [Read more…] about What is 4G Wireless?
By Dinesh Thakur
File transfer protocol is the way files are transferred from the server to the client across the network. [Read more…] about File Transfer Protocol (FTP)
By Dinesh Thakur
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
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. [Read more…] about Simple Network Management Protocol (SNMP)
By Dinesh Thakur
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 formatting and transferring webpage data (text, images, video and Multimedia files) over the world wide web. It 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. [Read more…] about What is HTTP (Hypertext Transfer Protocol)?
By Dinesh Thakur
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. [Read more…] about Architecture of the GSM Network
By Dinesh Thakur
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: [Read more…] about GSM Cellular Radio System and Features of GSM
By Dinesh Thakur
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. [Read more…] about Basic Wireless Principles
By Dinesh Thakur
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. [Read more…] about Cellular Radio Definition
By Dinesh Thakur
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. [Read more…] about TCP/IP Services And Application Protocols
By Dinesh Thakur
• 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. [Read more…] about TFTP – Trivial File Transfer Protocol (TFTP)
By Dinesh Thakur
• Cookie is a special header sent by the server to the client or browser. [Read more…] about HTTP Cookie – What is the HTTP cookie?
By Dinesh Thakur
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. [Read more…] about WWW Defined – What is the World Wide Web (WWW)?
By Dinesh Thakur
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. [Read more…] about Cable Modem
By Dinesh Thakur
ADSL stands for Asymmetric Digital Subscriber Line. ADSL is a type of DSL line and is one of the technologies vying to replace ISDN. It consists of the transmission of digital data supported by the symmetric pair of copper carried by the conventional telephone line or subscriber line, as long as the range does not exceed 5.5 km measured from the Telephone System, or there are no other services on the same cable that may interfere. It is a broadband Internet access technology, which implies a higher rate of data transmission in the data transfer, and supports simultaneous Internet browsing and phone use. [Read more…] about What is ADSL (Asymmetric Digital Subscriber Line)? – Definition
By Dinesh Thakur
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. [Read more…] about Telnet – What is Telnet?
By Dinesh Thakur
Before discussing about Domain Name Server: we are going to explain some factor and simple difference between Domain Name Server and Domain Name System. [Read more…] about What is DNS (Domain Name System)?