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. If two computers talked at the same time, their traffic would get combined as it was echoed out the other interfaces. Basic home network and internet components, devices and services. Solved multiple choice questions on computer networking. Network devices may be internetwork or intranetwork. Hub is a centralized device that connects multiple devices in a single lan. This is called a collision, and it would corrupt the data being transmitted by both computers.
To complete our examination of networking on a physical level, this chapter looks at the network devices that are used to create networks. The function of a hub is to direct information around the network, facilitating communication between all connected devices. Specifically, they mediate data transmission in a computer network. A hub does not perform any tasks besides signal regeneration. A specific network design needs a specific lan card. Computer networking devices explained with function. Accelerated ccnax as your network grows, it needs to be broken into smaller networks or network segments to ensure better performance of. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Table 11 design scope design scope detailed design scope example enterprise campus network and remote sites. The network access layer is functionally equal to a combination of osi physical and data link layers 1 and 2. Network devices are physical devices that are required for communication and interaction between hardware on a computer network. Basic home network and internet components, devices and services an internet connected homehome office network, consists of a variety of hardware and software components. For consultation and interpretation of components, devices and electrical and electronic circuit.
Network devices, or networking hardware, are physical devices that are required for communication and interaction between hardware on a computer network. Its job is to regenerate the signal over the same network before the signal becomes too weak or corrupted so as to extend the length to which the signal can be transmitted over the same network. The largest collection of symbols in the network in pdf format. A firewall is a security device that is designed to filter traffic that enters or exits your network. Skills covered in this course network administration it and hardware it. Different networking devices and hardware types hub. Some of them are the switches, routers, firewall etc. System area network cards are highperformance devices capable of coping with the demands of clustering applications. Once the osi model is understood, it will be easier to design, use, and, especially. As its important for it pros to know a router from a gateway, i put together a quick pop quiz on basic network devices. Cisco 200120 interconnecting cisco networking devices. In this tutorial we look at the various components that you need to create a computer network and connect it to the internet. Addresses are numeric quantities that are easy for computers to work with, but not for humans to remember. Now it less popular as users needed larger storage capabilities.
The major function of repeaters is as listed below. Comparing and contrasting network devices, their features and functions. A network in general sense is a group of devicesthingscells connected together for trasnport or sharing of resources. Modems connect you with your internet isp internet service provider. A central processing unit cpu, also referred to as a central processor unit, is the hardware within a computer that carries out the instructions of a computer program by performing the basic arithmetical, logical, and inputoutput operations of the system. Storage devices offline storage zip diskette hardware data storage device developed by iomega that functions like a standard 1. Lan networking, osi, network layer online course alison. Network topology refers to how various nodes, devices, and connections on your network are physically or logically arranged in relation to each other. Snmp uses the user datagram protocol udp and is not necessarily limited to tcpip networks. Apr 12, 2020 network devices are components used to connect computers or other electronic devices together so that they can share files or resources like printers or fax machines. So far this book has examined topologies, media access methods, networking standards, and cable types and connectors. A hub connects two or more computers together like switch in diagram above. Silicon is the most common material used to build semiconductor devices.
Describe the purpose and functions of various network devices. Identify the purpose, features, and functions of the following network components. Introduction to networks and routing and switching essentials ccna 12 itc 2535. Device function purpose key points hub connects devices on a twistedpair network. Bridge divides networks to reduce overall network traffic. The tcpip model uses four layers to perform the functions of the sevenlayer osi model. These devices transfer data in a fast, secure and correct way over same or different networks.
Think of your network as a city, and the topology as the road map. 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. First, by creating a direct path between two devices and controlling their communication, it can greatly reduce the number of collisions on the network. Comparing and contrasting network devices, their features and. Network devices hub, repeater, bridge, switch, router.
Let us explore some of these devices in greater detail. The layer 3 switch functions at the network layer and performs the multiport, virtual lan, data pipelining functions of a standard layer 2 switch. As a result, the scope of the information to be obtained will more be focused on these areas. Firewalls today are layer 4 devices which means they can make decisions based on tcp and udp ports in addition to ip addresses. The following is a brief introduction to common network components and devices. To connect lans, connecting devices are needed and various connecting devices are such as bridge, switch, router, hub, repeater. One should know about all of them to get some good insights about the network devices. Networks share common devices and functions, such as servers, transmission media the cabling used to connect the network clients, shared data e.
Computer peripheral devices and their functions explained this tutorial explains computer peripheral devices and their function in details with examples. Describe the purpose and function of network cards. Networking components and devices introduction pearson it. Repeater a repeater operates at the physical layer. Wap provides network capabilities to wireless network devices.
Modem translate analog to digital,reverses the action into the destination modem. Jan 08, 2019 to build a strong network and defend it, you need to understand the devices that comprise it. Network devices may be inter network or intra network. Accelerated ccnax as your network grows, it needs to be broken into smaller networks or network segments to ensure better performance of the network. As you might recall, collisions occur on ethernet networks when two devices attempt to transmit at exactly the same time. Next, you will study the ethernet the most widely installed lan technology and learn how devices on an ethernet network communicate with each other using frames. Hubs,bridges and switches are all devices used to connect computers and other devices together on an ethernet network. Hubs are effectively multi port repeaters and operate at the physical layer level one. Designing, installing, administering, and troubleshooting a network requires the ability to recognize various network components and their functions. Concerning the location of repeaters used the signals can be refreshed back without any noise and delay. Perhaps the icons are not important as much as the consistency of using similar icons for similar functions, and the same icon for the same device all the time.
Network administrator can expand the network into large distance with the help of repeater. Networking devices michigan technological university. A wap is often used to connect to a wired network, thereby acting as a link between wired and wireless portions of the network. So, we can have cameras connected to the network as input devices and share that camera across multiple users. Network topologies functions of networking icnd1 100105. These devices can connect different types of networks using different types of network protocols. Table 311 lists several common network components and their functions. There can be several paths to send a packet from a given source to a destination. The primary responsibility of network layer is to send packets from the source network to the destination network using a perdetermined routing methods.
General networking physical components and functions. A computer network allows many computersdevices to connect to one another and share resources. We can also categorize applications based on their. For example fddi, token ring and ethernet have their own distinctive type of nic cards. Segmenting the network with connectivity devices provides an actual physical example of delivering actual data to the right destination through the ip addresss network id and host id.
Comparing and contrasting network devices, their features. The internet layer performs the same functions as the osi network layer 3. Given an example, identify a media access control mac address. Hubs connect multiple computer networking devices together. Network interface cards nics, isdn adapters, and system area network cards. Each of the devices on the network can be thought of as a node. Join mark jacob for an indepth discussion in this video the functionality of various networking devices, part of learning networking. Network devices are components used to connect computers or other electronic devices together so that they can share files or resources like printers or fax machines. An input device is used to enter the data and instructions into the computer.
To build a strong network and defend it, you need to understand the devices that comprise it. In order to do this, we are going to start from the beginning. The course will also cover the main network topologies, including star, bus, ring and their functions. A hub is a device used to connect a pc to the network. Learn how computer peripheral devices such as ram, rom, processor, input and out device, motherboard and storage device work with functions and specifications. Computer peripheral devices and their functions explained.
Network devices hub, repeater, bridge, switch, router, gateways and brouter 1. The most important concept is a discussion of the osi model and how data flows across a network. A wide range of devices are used in modern networking. There are many network devices which are being used these days to get connected to the internet. Following figure illustrates some common types of nics. Networking hardware, also known as network equipment or computer networking devices, are electronic devices which are required for communication and interaction between devices on a computer network. Osi model 7 layers explained pdf layers functions the open systems interconnection model osi model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to their underlying internal structure and technology.
Different networking devices and hardware types hub, switch. For performing these functions, computer systems consist of input devices, a central processing unit cpu and output devices. 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. All networking devices require a modem to talk through a telephone line such as email service to the isp. Common network protocols and their ports interserver tips.
Also, output devices like printers, network storage will also be there, backup devices, so we do not have to back up locally on each machine. Networking components and devices introduction pearson. It can also perform basic routing functions between virtual lans. Apr 16, 2020 general networking physical components and functions. We are going to start, slowly but surely, building a theoretical network in our minds. Contents at a glance introduction xxv chapter 1 computer network fundamentals 2 chapter 2 the osi reference model 28 chapter 3 network components 60 chapter 4 ethernet technology 112 chapter 5 ipv4 and ipv6 addresses 148 chapter 6 routing ip packets 198 chapter 7 widearea networks 230 chapter 8 wireless lans 266 chapter 9 network. Just as there are many ways to arrange and maintain a citysuch as making sure the avenues and boulevards can facilitate. Devices used to setup a local area network lan are the most common type of network devices used by the public. A switch forwards data to its destination by using the mac address embedded in each packet. A lan requires a hub, router, cabling or radio technology, network. From nics to switches, modern networks are comprised of many devices. Network hub is a networking device which is used to connect multiple network hosts. Introduction lans do not normally operate in isolation but they are connected to one another or to the internet.
So when a host sends a data packet to a network hub, the hub copies the data packet to all of its ports connected to. The data is transferred in terms of packets on a computer network. Core network components interconnect other network components. So, each computer would have to try again, after a. This chapter introduces commonly used networking devices, and, although. Units which are the last receiver or generate data are called hosts, end systems or data terminal. The network devices work as a group and have a single purpose which securely transfers data as fast as.
Basic home network and internet components, devices and. Modem is a device that enables a computer to send or receive data over telephone or cable. It amplifies the signals without impacting the speed of the networks. Computer networking devices explained with function this tutorial explains the functions of the most common and the essential networking devices such as hub, switch, router, bridge, modem, nic, proxy and gateway in detail with examples. Routers perform the traffic directing functions on the. Simple network management protocol snmp is the protocol governing network management and the monitoring of network devices and their functions. Describe the function and operation of a hub, a switch and a router describe the function and operation of a firewall and a gateway describe the function and operation of layer 2 switching, layer 3 switching, and routing identify the layers of the osi model describe the functionality of lan, man, and wan networks.
Some devices are installed on the device, like nic card or rj45 connector, whereas some are part of the network, like router, switch, etc. Routers are different from switches and bridges, which. Implementing cisco ios network security ccna security itc. Capable to hold up to 100 mb of data or 250 mb of data on new drives. For example, the cloud in this instance is not really, or does not really, represent a rainy day.
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