Later, however, cable tv providers replaced most of the media with fiberoptic cable. Introduction a computer network is the infrastructure that allows two or more computers called hosts to communicate with each other. Longhaul trunksincreasingly common in telephone network sprint ads. Program to remotely power on a pc over the internet using the wakeonlan protocol. This technology was invented by bob metcalfe and d. Presentation on transmission media slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Computer networks pdf notes free download cn notes. Transmission mediums in computer networks studytonight. Components of data communication, distributed processing, line configuration, topology, transmission mode, and categories of networks. It is done to enable the computers to communicate and share available resources. Explain the characteristics of the popular guided transmission media. Signals are transmitted in the form of electromagnetic energy from one device to another.
This type of communication is often referred to as wireless communication. Peer to peer networking clientserver networks are more suitable for larger networks. All unguided media transmission are classified as wireless transmission. Transmission media in computer networks studyopedia. Pdf models of transmission media for a library network. Network which uses shared media has high probability of. Bound transmission media are the cables that are tangible or have physical existence and are limited by the physical geography. Introduction to computer networks and data communications. Here you can download the free lecture notes of computer networks pdf notes. Use of higher frequency for efficient transmission through a media possibility of sending more than one signal through a media simultaneously through fdm frequency division multiplexing technique. The transmission media that are used to convey information can be classi fied as guided or. Learn about computer network transmission cables and media.
Transmission medium is the means through which we send our data from one place to another. Transmission media are necessary to form a computer network, as they are the physical paths between a transmitter and a receiver. Here information is transmitted by sending electromagnetic signals through free space and hence the name unguided media, as the signals are not guided in any specific direction or inside any specific medium. This interconnection among computers facilitates information sharing among them. Computer communication networks department of ece, ace page 3 layer 6.
Computers may connect to each other by either wired or wireless media. Computer networking lesson 2 transmission media youtube. For longdistance applications, twisted pair can be used at data rates of 4 mbps or more. Protocol layering d needed because communication is complex d intended primarily for protocol designers. If you are sharing a dialup internet connection, select the establish a dialup connection whenever a computer on my network attempts to access the internet check box if you want to permit your computer to automatically connect to the internet. 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.
It is also referred to as wired or bounded transmission media. A computer network is defined as the interconnection of two or more computers. Transmission media and network cabling physical layer. Cable tv networks see chapter 9 also use coaxial cables. Guided media guided media, which are those that provide a conduit from one device to another, include twistedpair cable, coaxial cable, and fiberoptic cable. A free powerpoint ppt presentation displayed as a flash slide show on id.
In guided media, medium characteristics is more important, whereas in unguided media, signal. Computer networking lesson 2 transmission media by suresh khanal vvv more below vvv this is video series is for the candidates of computer operator and data entry supervisors to. The transmission media is nothing but the physical media over which communication takes place in computer networks. Signals are transmitted in the form of electromagnetic energy. One of the most convenient way to transfer data from one computer to another, even before the birth of networking, was to save it on some storage media and transfer physical from one station to another.
Transmission media are the physical pathways guided or unguided that connect computers, other devices, and people on a network. Fundamentals of computer networking and internetworking. Data communication and computer network 1 a system of interconnected computers and computerized peripherals such as printers is called computer network. 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. Unguided media computer networks cn free download as powerpoint presentation. A signal travelling along any of these media is directed and contained by the physical limits of the medium. Ethernet ethernet is a widely deployed lan technology. Transmission capacity of a communication channels b. Unguided media data transmission lesson objectives by the end of this lesson, you should be able to. Most of telephone and network wiring in homes and offices is tp. The transmission medium is the physical path by which a message travels from sender to receiver. Computer networks pdf notes bca 2019 all tricks here.
Characteristics and quality of data transmission are determined by medium and signal. Internet control message protocol icmp introduction and ipv4. Distinguish between attenuation distortion and delay distortion. Computer networks pdf notes starts with the topics covering. The first layer physical layer of communication networks osi seven layer model is dedicated to the transmission media, we will study the osi model later. Transmission mediums in computer networks kencorner.
Characteristics and quality of data transmission are determined by. Computer networks tutorial 6 transmission media youtube. The first layer physical layer of communication networks the osi seven layer model is dedicated to the transmission media. Spectral response computer selected glass filters are designed to. Guided media provide a physical path along which the signals are propagated.
In a computer network, the transmission media could be divided broadly into two categories, they are guided transmission media gtm and unguided transmission media utm. Conducted and wireless media data communications and computer networks. Digital transmission 5 analog transmission 6 bandwidth utilization. Signal is used to represent data, by computer and telecommunication devices. Transmission mediums in computer networks is broadly classified into two groups wired or guided media or bound transmission media. Some examples of transmission media include twistedpair wire. Explanation of all guided transmission media in networking. The network interface card address, called the hardware address, is protocolindependent and is usually assigned at the factory. Due to the variety of transmission media and network wiring methods, selecting the most appropriate media can be confusing what is the optimal costeffective solution.
Data transmission is the movement of data bits between at least two digital devices. Transmission media is broadly classified into two groups. Ppt transmission media powerpoint presentation free to. This address is technically called the media access control address mac because it is found on the mac sub layer of the data link layer. Data communication and computer network 8 let us go through various lan technologies in brief. Twisted pair is much less expensive than the other commonly used guided transmission media coaxial cable, optical fiber and is easier to work with. Unguided media computer networkscn radio propagation. Therefore it is also known as wireless transmission in unguided media, air is the media through which the electromagnetic energy can flow easily. List the impairments found in unguided transmission media.
Some examples of transmission media include twistedpair wire, coaxial cable, fiberoptic cable, and radio waves 5. Signals are normally broadcast through free space and thus are available to anyone who. The transmission media that are used to convey information can be classified as guided or unguided. Computer networks overview of this section digital communications digital media books tale of two networks digital communications i slide 21.
Can be minimized by proper shielding in guided media number of receivers in a shared link, each attachment introduces attenuation and distortion on the line guided transmission media transmission capacity bandwidth and data rate depends on distance and type of network pointtopoint or multipoint twisted pair least expensive and most. Transmission media is broadly classified into the following types. Transmission media is also called communication channel. Description transmission media are located below the physical layer computers use signals to represent data. The adobe flash plugin is needed to view this content. Guided vs unguided transmission media submitted by. Pdf transmission media are the physical pathways guided or unguided that connect computers, other devices, and people on a network. Version 22111 computer networks i application transport network transmission media link physical computer networks i 2 outline some informal definitions. In any communication network, transmission media is important as it serves as a physical path between the sender and receiver. Computer network transmission media free download as pdf file. Models of transmission media for a library network.
Wireless unguided media transport electromagnetic waves without using a physical conductor. Ppt transmission media powerpoint presentation free to download id. These electromagnetic signals travel through transmission media. Multiple choice questions of computer networking 11 computer network is a. In the traditional cable tv network, the entire network used coaxial cable. The network achieves this by providing a set of rules for communication, called protocols, which should be observed by all participating hosts.
Find hundreds of computer documents in pdf, courses and exercises on different areas such as programming, network, databases, hacking and many others. Popular bound transmission media in use are twisted pair cable, coaxial cable and fiber optical cable. A central computer, or server, acts as the storage location for files and applications shared on the network. Download free network topologies tutorial course material and training in pdf file under 4 pages by maninder kaur. Multiplexing and spreading 7 transmission media 8 switching 9 using telephone and cable networks for data. Data is represented by computers and other telecommunication devices using signals. For data communications to occur,the communicating devices must be part of a communication system made up of a combinationof hardware physical equipment and software programs. In this lesson, lets learn the types of transmission media and. A brief explanation of the various transmission media used in networking. If you continue browsing the site, you agree to the use of cookies on this website. Information that is stored within computer systems and transferred over a computer network can be divided into two categories. In data communication terminology, a transmission medium is a physical path between the transmitter and the receiver i. Ppt unguided media powerpoint presentation free to.
574 747 1118 1046 26 247 1341 577 1390 313 1259 12 1355 51 538 944 365 1239 1579 1629 929 858 187 93 812 862 798 402 1245 181 91 900 581 616 305