Computer communication networks department of ece, ace page 3 layer 6. Most wan networks are used to transfer large blocks of data between its users. Jul 01, 20 in this video, anthony sequeira discusses wide area networking and distinguishes these technologies from lans. This website is good for dca student but this website is not allow pdf. Network data link physical the seven layers of the osi model cont. The notes and books this is a description of the teaching material, its organisation and how it relates to the units in the open systems and networks elective module.
A wan wide area network is a communications network that spans a large geographic area such as across cities, states, or countries. A computer network consists of two or more computers that are interconnected with each other and share resources such as printers, servers, and hardware and exchange the data in the form of files. Wans are characterized by the slowest data communication rates and the largest distances. A node can be a computer, printer, or any other device capable of sending andor receiving data generated by other nodes on the network. The book is aimed at all audiences even those with absolutely no prior tech. Before discussing lan wan and man, let us know about the network. Transit time is the amount of time required for a message to travel from one device to. Its data transfer data is usually low as compared to lan, but it is compatible with a variety of access. Fig 1 gives an example of a network in a school comprising of a local area network or lan connecting computers with each other, the internet, and various servers. A node can be a computer, printer, or any other device capable of sending andor receiving data.
There are two prevailing definitions of a wide area network wan. That is, one network can be connected to another network and become a more powerful tool because of the greater resources. A wide area network is simply a lan of lans or network of networks. Wide area network wan wan covers a large geographic area such as country, continent or even whole of the world. Each essential networking concept is explained individually in separate networking tutorial. Nov 19, 2012 the focus of this post is on networking emails, a very important but underlooked aspect of networking. Computernetworktechnologies andservices lecture notes main authors. Routers are used to connect different lans or a lan with a wan e. This site contains which contains many networking courses is for you. Ccna study guide complete computer networking notes guides.
Looking for free ccna study guide or ccna tutorials or do not have money to get expensive ccna online training, you are at right place. This layer is usually part of an operating system os and converts incoming and outgoing data from one presentation format to another for example, from clear text to encrypted text at one end and back to clear text at the other. This ensures that computers and users in one location can communicate with computers and users in other locations. Service provider p devicesp devices are devices such as routers and switches within the provider network that do not directly connect to customer networks.
Data networking is like telephone calls we will devise and offer various data services charges will depend on distance and duration you only need 128 kbps d the early computer vendor answer a network connects computers in your organization we will devise all the necessary equipment and software. Star metropolitan area networkinterconnects users in a city and its outlying regions. For offline study you can download pdf file from below link datacommunicationnetworkingstudynotespdf try now data communication and networking mcqs by behrouzforouzan. A man is typically owned and operated by a single entity such as a government body or large corporation. The practical definition of a wan is a network that traverses a public.
Tom adamski specialist solutions architect, aws aws networking fundamentals. Telecom carrier network facilities wide area networks wans carried over same physical facilities as voice next lecture local loop, local switch, tandem switch, trunk carried on permanent circuits of much higher bandwidth than for a single voice call. A wide area network wan is a geographically distributed private telecommunications network that interconnects multiple local area networks lans. A network connects computers in your organization we will devise all the necessary equipment and software. Various types of computer networks like pan, lan, man and wan. Introduction to networking advantages of networking types of networks models of networking appropriate to students. Apr 25, 2019 cbse class 12 informatics practices notes chapter 1 computer networking pdf free download is part of class 12 informatics practices notes for quick revision. Lans and wans can be interconnected via t1 or t3 digital leased linesaccording to the protocols involved, networks interconnection is achieved using one or several of the following devices.
It is cheaper and more efficient to use the phone network for the link. In this lecture, we discuss fundamental concepts of computer networks. Personal area network pan a personal area network pan is a computer network used for communication among computer devices, including telephones and personal digital assistants, in proximity to an individuals body. There can be several paths to send a packet from a given source to a destination.
A computer network consists of a collection of computers, printers and other equipment that is connected together so that they can communicate with each other. In this video, anthony sequeira discusses wide area networking and distinguishes. Networks of low capacity may be connected together via a backbone network which is a network of high capacity such as a fddi network, a wan network etc. Ive had a lot of networking failures and successes over the years, and i wanted to share some of the networking tips and tricks i.
A wan provides long distance transmission of data, voice image and video information over large geographical areas that may comprise a country, a continent or even the whole world. Networking tutorials are organized based on fundamental networking terms. Nov, 2018 short for wide area network, a wan is a collection of computers and devices connected by a communications network over a wide geographic area. Download free networking courses and tutorials training in pdf lan, wan, router, switcher,the internet, intranet, would you like to learn how computer networks work. We have grouped in this site many courses likely to help you to master the net. Some of these notes focus on contacting people you dont know but that would be useful to your career or job search.
In the today world, two devices are in network if a process in one device is able. The computers on a network are also coupled through cables. Additionally, the ccna curriculum provides training in the proper care, maintenance, and use of networking software tools and equipment. There are several streams and area of specializations under computer network in which students shall have their own. Frame relay is one of the most popular wan service deployed over the past decade. Types of computer networks find notes the easy way. Short for wide area network, a wan is a collection of computers and devices connected by a communications network over a wide geographic area. Wans can be used to connect cities, states, or even countries. Wide area networks are often established with leased telecommunication circuits business, as well as education and government entities use wide area networks to relay data to staff, students, clients, buyers and suppliers from various locations. Bus wide area network connects significant portion of a country hundreds of kilometers. Basic concepts of frame relay explained in easy language. Before we discussing about type of network we can discuss about what is a network. Understanding wan technologies and why networks were divided to local area networks lan and wide area network wan will help you distinguish among what i call packet carriers technologies which carry generated packets among network devices from hop to hop. In a sitetosite vpn, devices in the service provider network also fall into one of two categories.
Lan is a private network used in small offices or homes usually within 1km range with high speed transfer data rate and fulltime service connectivity in low cost. Here we have given ncert class 12 informatics practices notes chapter 1 computer networking. There are several streams and area of specializations under computer network in which students shall have their own choices for their future career. Basic of networking a computer network consists of a collection of computers, printers and other equipment that is connected together so that they can communicate with each other. Networking tutorials complete computer networking notes. In chapter 1, foundation, learn how local and wide area networks wans are now built to connect more than computers. Wide area networks wans encyclopedia business terms.
Internetwork a network of networks is called an internetwork, or simply the internet. Ip is a standard that defines the manner in which the network layers of two hosts interact. Introducing basic network concepts 3 basetech networking concepts team 2230894 blind folio 3. The communication between different users of wan is established using leased telephone lines or satellite links and similar channels. Principles, protocols and practice, release techniques allow to create pointtopoint links while radiobased techniques, depending on the directionality of the antennas, can be used to build networks containing devices spread over a small geographical area. Download free networking courses and tutorials training in pdf.
A wide area network wan is a network that exists over a largescale geographical area. And a lot of people think its more difficult or unattainable than it really is. Each of the devices on the network can be thought of as a node. Even though several advanced technologies such as vpn, atm are available today, frame relay still rocks and will be in near future due to its features, benefits and lower cost in comparison with other point to point wan services. The communication between different users of wan is established using leased telephone lines, satellite links and similar channels. The devices may or may not belong to the person in question.
A wide area network occupies a very large area, such as an entire country or the entire world. A wan connects different smaller networks, including local area networks lans and metro area networks mans. Provides connectivity and path selection between two host systems routes data packets selects best path to deliver data the network layer prioritizes data known as quality of service qos. Wide area networks wanslarger geographic distance e. A network consists of 2 or a lot of computers that are coupled so as to share resources such as cds and printers, exchange files, or enable electronic communications. A network can be defined as a group of computers and other devices connected in some ways so as to be able to exchange data. Understand essential networking concepts in easy language. Practice now data communication and networking online tests. This document includes information under the following main headings.
I initially developed this material as a single weeks lecture in the si502networkedcomputingcourse that i taught at the university of michigan school of information starting in 2008. Smbuf12 7 6 5 4 3 2 1 application presentation session transport network data link physical the seven layers of the. Download this computer networking pdf excerpt from computer networks, a book that addresses the key principles of computer networks. A network spanning a physical area larger than a lan but smaller than a wan, such as a city. Fundamentals of computer networking and internetworking. Computer network technologies and services lecture notes. Nov 11, 2019 a wan wide area network is a communications network that spans a large geographic area such as across cities, states, or countries. Preface the goal of this book is to provide a basic understanding of the technical design and architecture of the internet. Computernetworktechnologies andservices lecture notes. The most important of these are performance, reliability, and security. This ccna study guide explains each ccna topic in detail with examples in separate ccna tutorial. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
Layering gives a guideline, not a rigid framework optimizations may violate strict layering computer networks and internets module 1 31 spring, 2014. Its a word with a lot of preconceived notions attached to it. Performance can be measured in many ways, including transit time and response time. A lan based on wifi wireless network technology metropolitan area network. Computer networks fall into three classes regarding the size, distance and the structure namely. They can be private to connect parts of a business or they can be more public to connect smaller networks together. Class 12 informatics practices notes chapter 1 computer. Wans connect lans that may be on opposite sides of a building, across the country or around the world. The sample notes below are real notes that have been successfully used, but names and details have been changed. Wan covers a large geographical area for example, a country or a continent. To cover great distances, wans may transmit data over leased highspeed phone lines or wireless links such as satellites. The book definition of a wan is a network that spans large geographical locations, usually to interconnect multiple local area networks lans.
Lan, wan,man today, we will discuss the main types of computer networks on the basis of the maximum distance covered where they can be accessed and operate. Networking is a big domain under computer science and engineering. Ip addresses are 32 bit long, hierarchical addressing scheme. Wan man lan lan 1 2 man lan lan 1 2 long haul network provides signal transmission link between distant regions within a country, countries, and continents. A wide area network wan is a telecommunication network. The moment packets hit the routers internet interface, they become at what is called wan. For perfect computer notes and it tips and tricks visit. As the naming conventions suggest, lans are for smaller, more localized networking in a home, business, school, etc. A wide area network wan is a data network, usually used for connecting computers, that spans a wide geographical area. The course contents of computer network under bachelor degree level is very basics. A wide area network wan is a telecommunications network that extends over a large geographical area for the primary purpose of computer networking. Explain different types of computer networks lan, man, wan.
The main material for the module is providedby these notes. The primary responsibility of network layer is to send packets from the source network to the destination network using a perdetermined routing methods. Wide area networks are commonly connected either through the internet or special arrangements made with phone companies or other service providers. Addresses are numeric quantities that are easy for computers to work with, but not for humans to remember. Data communication and computer network 6 wan may use advanced technologies such as asynchronous transfer mode atm, frame relay, and synchronous optical network sonet.
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