May 25, 2012 a group of devices receiving broadcast frames initiating from any device within the group. Networking devices michigan technological university. Today i am going to share with you all the notes related to electronic devices subject for gate. It is a central connection point for several network devices. Network security is the security provided to a network from unauthorized access and risks. In the application layer lies many of network aware programs and services such as. The term network topology defines the geographic physical or logical arrangement of computer networking devices. Network interface card nic in the list of the networking devices, nic stands on the first place. Prepare this subject from these notes and you will.
A modem modulator demodulator is an electronic device that enables a computer to transmit data over telephone lines. It is used to connect computers, network devices and network segments. It is the duty of network administrators to adopt preventive measures to protect their networks from potential security threats. Network layer it is responsible for the source to destination delivery of a packet across multiple networks. Feb 16, 20 networking devices, it helps computer networking students. It does not transmit the data packets to all nodes connected on the network like a hub does. For transmission over an analog telephone linewhich was once the most popular way to access the internetthe modem converts data between analog and digital formats in real time for twoway network communication. It can be defined as the physical layout of cabling for connecting computers and other network devices on the network which describe how the computers and networking devices are linked with each other and how they communicate.
Network topologies topology physical and logical network layout physical actual layout of the computer cables and other network devices logical the way in which the network appears to the devices that use it. There are two types of modems, namely, internal modem and external modem. Hubs typically do not filter data, but instead retransmit incoming data packets or frames to all parts. The annotated lecture files include comments that the professor uses to demonstrate how the material progresses. Proper strategy and revision is a mandatory requirement for clearing any competitive examination. Network devices hub, repeater, bridge, switch, router, gateways. This book covers short notes and formulae for electronics engineering. In the networking, we use different network devices for communication purpose in the network. So, a man is larger than a local area network but it is smaller than a wan. The term topology refers to the way in which the various nodes or computers of a network are linked together. The hub, switch, or concentrator manages and controls all functions of the network. Isdn terminal adapter connects devices to isdn lines. An input device is any hardware component that allows a user to enter data and instructions into a computer. Kindly share this post with your friends to make this exclusive release more useful.
A vpn virtual private network allows for information to be securely sent across a public or unsecure network, such as the internet. When a device needs to transmit, it reserves the token for the next trip around, then attaches its data packet to it. In this, one device controls the traffic and all other devices transmit through primary device. First, by creating a direct path between two devices and controlling their communication, it can greatly reduce the number of collisions on the network. This is also known as network adapter card, ethernet card and lan card. These network devices also work at different segments of a computer network performing different works. The star topology reduces the chance of network failure by connecting all of the systems to a central node. A hub does not perform any tasks besides signal regeneration. Real people just like you are kissing the idea of punching the clock for someone else goodbye, and embracing a new way of living. If you like this tutorial, please dont forget to share it with friends through your favorite social network. The geometric arrangement of devices on the network.
Pdf handwritten network theory made easy study materials. Multiprotocol means that mpls can not only support multiple protocols at the network layer level, but also be compatible with multiple data link layer technologies of the second layer. Student notes page 1 of 7 k aquilina input devices input is any data or instructions entered into the memory of a computer. Lecture notes and readings network and computer security.
Bus topology is a network type in which every computer and network device is connected to single cable. Network theory notes pdf nt notes pdf book starts with the topics introduction,advantages of three phase is preferred over single phase,frequencyselective or filter circuits pass to the output only those input signals that are in a desired range of. Computer networking devices explained with function. Some devices are installed on the device, like nic card or rj45 connector, whereas some are part of the network, like router, switch, etc. Different networking devices and hardware types hub. By convention, switching devices acting at the lan layer and forwarding packets based. Computer science tutorials,short questions and answers,multiple choice questions and answersmcq sets,online testquiz,short study notes dont hesitate to contact us via facebook,or through our website. Network devices may be internetwork or intranetwork.
A metropolitan area network man is a network that covers an area of the size of a city. Service provider p devicesp devices are devices such as routers and switches within the provider network that do not directly connect to customer networks. Download free computer networking notes, pdf, ebooks, ppt, project report, software and many more things related to networking just on. Bluetooth is a wireless lan technology used to connect devices of different functions such as telephones, computers laptop or desktop, notebooks, cameras, printers and so on. A network is a group of connected communicating devices such as computers and printers.
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. Notes on network topology and elements of network grade 10. Bluetooth project was started by sig special interest group formed by four companies ibm, intel, nokia and toshiba for interconnecting computing and communicating devices using short range, lowerpower, inexpensive. Also, ccna is foundation exam for ccnp cisco certified networking professional. The network topology is the cabling pattern of interconnection of computers on the network. Networking devices, it helps computer networking students. Topics include tcpip model of internetworking, configuring, and troubleshooting some of the most widely used cisco switches and routers. All devices connected arbitrarily using all previous ways to connect each other, resulting in a hybrid structure. It describes the actual layout of the computer network hardware. Computer networks that are involved in regular transactions and communication within the government, individuals, or business. Packet forwarded from node to node within network short packets.
Because token ring networks are few and far between nowadays, it is far more likely that you will find yourself working with ethernet hubs and switches. These devices transfer data in a fast, secure and correct way over same or different networks. An undesired event on the network caused by the simultaneous transmission of any number of broadcasts across the network. 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. Ccna exam tests you in the areas of simple lanwan switching, cisco ios, and routing. Each data link on a network must have a unique network id, with every node on that link being a member of the same network.
Heres a brief description of these different devices. Gate electronic devices handwritten notes made easy ace. Prepare this subject from these notes and you will surely do well in this subject. If you break a major network class a, b, or c into smaller subnetworks, it allows you to create a network of interconnecting subnetworks. For offline study you can download pdf file from below link. Computer networks pdf notes free download cn notes. Bridge divides networks to reduce overall network traffic. Data on a star network passes through the hub, switch, or concentrator before continuing to its destination. Describe, in general terms, the reasons for implementing lan segmentation. Some devices are connected to the system via a general io bus, which in many modern systems would be pci or one of its many derivatives. Common uses of a vpn are to connect branch offices or remote users to a main office. It can be a computer, workstation, telephone handset, television, and so on. The electronic devices and circuits notes pdf edc pdf notes book starts with the topics covering qualitative theory of pn junction, the pn junction as a rectifier, the junction transitor, the dc and ac load lines, determination of hparameters from transistor characteristics, the junction field effect transistor construction, principle.
There can be several paths to send a packet from a given source to a destination. The simple network management protocol snmp collects and exchanges network management information between a network management console and network devices such as routers, bridges, and servers. The last msau in the ring is then connected to the first to complete the ring. Computer networking notes pdf free download snabay. A group of devices receiving broadcast frames initiating from any device within the group. Notes on elements of network grade 10 computer science. Administration from an administrators point of view, a network can be private network which. A connectivity device to which network cables are attached to form a network segment.
An internet note the lowercase letter i is two or more. In this relationship, all the devices in the network have equal status in sharing the link. Today i am going to share with you all the notes related to network theory subject for gate. If suppose, n number of devices are connected with each other, then total number of links required to connect nc 2. Electronic devices and circuits pdf notes edc notes pdf. That smaller segment is set apart from the larger network by a device that can filter data and help. Gate network theory handwritten notes made easy ace. Security mechanisms and principles pdf juels, ari, and ronald rivest.
Here you can download the free lecture notes of neheory ptwork tdf notes nt pdf notes materials with multiple file links to download. A network refers to two or more connected computers that can share. The primary responsibility of network layer is to send packets from the source network to the destination network using a perdetermined routing methods. Nic allows a networking device to communicate with the other networking device. Each of the devices on the network can be thought of as a node. Lecture notes microelectronic devices and circuits. Almost all networks today use a central hub or switch to which the computers on the network connect. Network devices hardware devices that are used to connect computers, printers, fax machines and other electronic devices to a network are called network.
The rules and encoding specifications for sending data. If two systems are attached to different networks with devices like routers, then nw layer is used. Data communication and computer network 2 all devices connected together with a single device, creating starlike structure. A modem converts data to a signal so it can be easily sent and received over a phone line, cable, or satellite connection. Each data link on this network would then have a unique network subnetwork id. The following is a list of the most common input devices which are nowadays found in a computer system. San storage area network provides systems with highspeed, lossless access to highcapacity storage devices. Data communication computer network short question and answer pdf. For example, devices can be arranged in a ring or in a straight line. Addresses are numeric quantities that are easy for computers to work with, but not for humans to remember. Network topologies michigan technological university.
When one machine attached to the hub sends anything over the network, all the devices attached to the hub receive that signal. 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. A failure in any cable or device breaks the loop and can take down the entire network. The protocols also determine whether the network uses a peertopeer or clientserver architecture. Notes on network topology and elements of network grade. Finally, even lower down are one or more of what we call a peripheral bus, such as scsi, sata, or usb. Snmp 161162 simple network management protocol which is used for managing network devices. Routers normally connect lans and wans together and have a dynamically updating routing table based on which they make decisions on routing the data packets. The network area in ethernet over, which frames that have collided and damaged. As you might recall, collisions occur on ethernet networks when two devices attempt to transmit at exactly the same time. Depending on the application, the transport layer either offers reliable, connectionoriented or connectionless, besteffort communications. This section provides a complete set of lecture notes for the course.
There also have to be specific devices that handle digital connections and perform their. Bluetooth project was started by sig special interest group formed by four companies ibm, intel, nokia and toshiba for interconnecting computing and communicating devices using shortrange, lowerpower, inexpensive. Let us explore some of these devices in greater detail. It can be a computer, workstation, telephone handset, video camera, and so on. Networking devices 61 to the ring out ro port on another msau. Layer 4 the transport layer layer 4,the transport layer of the osi model,offers endtoend communication between end devices through a network. Isdn is a digital wan technology often used in place of slower modem links. Thus dll overseas the delivery of the packet between. Thus dll overseas the delivery of the packet between the two systems on same network and the network. When hub receives the data signals from a connected device on any of its port, except that port, it forwards those signals to all other connected devices from the remaining ports. Hub is a centralized device that connects multiple devices in a single lan network.
Most of the lectures also include an annotated lecture file. In mesh topology, every device is connected to another device via particular channel. Network interfaces can be addin expansion cards, pcmcia cards, or builtin interfaces. The sender is the device that sends the data message.
Hubs connect multiple computer networking devices together. Different networking devices have different roles to play in a computer network. Multiprotocol label switching mpls is a new technology that uses tags to guide data at high speed and high efficiency on an open communication network. A switch forwards data to its destination by using the mac address embedded in each packet. Explain different types of computer networks lan, man.
The term physical topology refers to the way in which a network is laid out physically. Routers a router is a device like a switch that routes data packets based on their ip addresses. Short notes of networkinginterview questions ccna, network. Network devices hub, repeater, bridge, switch, router, gateways and brouter why. In a sitetosite vpn, devices in the service provider network also fall into one of two categories. Network devices hub, repeater, bridge, switch, router. As you might recall, collisions occur on ethernet networks when two.