Have you ever heard of the Internet or the NET? I guess you have, as you are already reading this article on Interviewbit surfing the internet. But, have you ever thought about the internet? The Internet is a network of a network connecting all different network-enabled devices which enable data and information sharing between them and that makes computer networks a core part of our life and technical interviews.
Computer Networks And Communications Pdf Download
LANs are widely used to connect computers/laptops and consumer electronics which enables them to share resources (e.g., printers, fax machines) and exchange information. When LANs are used by companies or organizations, they are called enterprise networks. There are two different types of LAN networks i.e. wireless LAN (no wires involved achieved using Wi-Fi) and wired LAN (achieved using LAN cable). Wireless LANs are very popular these days for places where installing wire is difficult. The below diagrams explain both wireless and wired LAN.
FTP is a File Transfer Protocol. It is an application layer protocol used to transfer files and data reliably and efficiently between hosts. It can also be used to download files from remote servers to your computer. It uses port 27 by default.
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The Journal of Network and Computer Applications welcomes research contributions, surveys and notes in all areas relating to computer networks and applications thereof. The following list of sample-topics is by no means to be understood as restricting contributions to the topics mentioned:
new design techniques, interesting or novel applications, components or standards
computer networks with tools such as WWW
emerging standards for internet protocols
Wireless networks
Mobile Computing
emerging computing models such as cloud computing, grid computing
emerging network protocols such as sensor networks, delay tolerant networks, Internet of things
applications of networked systems for remote collaboration and telemedicine
applications of an educational, transactional and cooperational nature
applications of security in computer and networks
Our Computer Networking and Telecommunications graduates are designing the communication networks of tomorrow. They go on to work in engineering, design, support, managerial, sales, consulting, and regulatory positions.
Computer networks were first created in the late 1950s for use in the military and defense. They were initially used to transmit data over telephone lines and had limited commercial and scientific applications. With the advent of internet technologies, a computer network has become indispensable for enterprises.
The underlying physical network infrastructure can be logically partitioned to create multiple "overlay" networks. In an overlay computer network, the nodes are virtually linked, and data can be transmitted between them through multiple physical paths. For example, many enterprise networks are overlaid on the internet.
Modern networking services connect physically distributed computer networks. These services can optimize network functions through automation and monitoring to create one large-scale, high-performance network. Network services can be scaled up or down based on demand.
In this type of computer network, nodes may be servers or clients. Server nodes provide resources like memory, processing power, or data to client nodes. Server nodes may also manage client node behavior. Clients may communicate with each other, but they do not share resources. For example, some computer devices in enterprise networks store data and configuration settings. These devices are the servers in the network. Clients may access this data by making a request to the server machine.
Service provider networks allow customers to lease network capacity and functionality from the provider. Network service providers may consist of telecommunications companies, data carriers, wireless communications providers, Internet service providers, and cable television operators offering high-speed Internet access.
Firewalls serve to protect an internal network from external attacks. These external threats can be hackers who want to steal data or computer viruses that can wipe out data in an instant. It also prevents other users from external networks from gaining access to the private network.@media(max-width: 499px) .content91 min-height: 100px !important; @media(min-width: 500px) .content91 min-height: 91px !important; if (typeof(pubwise) != 'undefined' && pubwise.enabled === true) pubwise.que.push(function() pubwise.renderAd('div-gpt-ad-9092914-9'); ); else googletag.cmd.push(function () googletag.display('div-gpt-ad-9092914-9'); googletag.pubads().refresh([gptadslots['div-gpt-ad-9092914-9']]); );
TCP/IP is short for Transmission Control Protocol / Internet Protocol. This is a set of protocol layers that is designed to make data exchange possible on different types of computer networks, also known as a heterogeneous network.
Internetworking research in the early 1970s led by Bob Kahn at DARPA and Vint Cerf at Stanford University and later DARPA formulated the Transmission Control Program,[11] which incorporated concepts from the French CYCLADES project. As this work progressed, a protocol was developed by which multiple separate networks could be joined into a network of networks. Version 4 of TCP/IP was installed in the ARPANET for production use in January 1983 after the Department of Defense made it standard for all military computer networking.[12][13]
The earliest ideas for a computer network intended to allow general communications among computer users were formulated by computer scientist J. C. R. Licklider of Bolt Beranek and Newman (BBN), in April 1963, in memoranda discussing the concept of the "Intergalactic Computer Network". Those ideas encompassed many of the features of the contemporary Internet. In October 1963, Licklider was appointed head of the Behavioral Sciences and Command and Control programs at the Defense Department's Advanced Research Projects Agency (ARPA). He convinced Ivan Sutherland and Bob Taylor that this network concept was very important and merited development, although Licklider left ARPA before any contracts were assigned for development.[18] 2ff7e9595c
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