Computer networking basics pdf


 

An Introduction to Computer Networks 1 An Overview of Networks. 13 of selected important network applications, or the basics of network. all part of, computer networks let us share information and resources. In business , . The most basic computer network (which consists of just two connected. Networking Fundamentals Describe the functionality of LAN, MAN, and WAN networks. • Identify A network refers to two or more connected computers that.

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Computer Networking Basics Pdf

Introduction. -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. -Each of the . A computer network is a collection of two or more connected computers. When these computers computer networking becomes increasingly more important. Computer Networking: Principles, Protocols, and Practice was written by Dr. Olivier Bonaventure of the. Université catholique de Louvain for teaching Local Area.

It is generally limited to a geographic area such as a writing lab, school, or building. Computers connected to a network are broadly categorized as servers or workstations. Servers are generally not used by humans directly, but rather run continuously to provide "services" to the other computers and their human users on the network. Services provided can include printing and faxing, software hosting, file storage and sharing, messaging, data storage and retrieval, complete access control security for the network's resources, and many others. Workstations are called such because they typically do have a human user which interacts with the network through them. Workstations were traditionally considered a desktop, consisting of a computer, keyboard, display, and mouse, or a laptop, with with integrated keyboard, display, and touchpad.

The client can connect over a network to exchange information. In the example below, two computers are connected together with an Ethernet cable.

Chapter 1: What is a Network?

These computers are able to see each other and communicate over the cable. The client computer asks for a website from the server computer.

Most requests and content delivery on networks are similar to, or are based on, a client to server relationship. On a network, the server can be located almost anywhere, and if the client has the address, it can access the content on the server. This identification is an IP—Internet Protocol—address. An IP address is just a set of four numbers between 1 and , separated by dots. An example of an IP address is An IP address is similar to a street address.

Parts of the address describe where in the world the building is located, another part narrows it down to a state or city, then the area within that state or city, then the location on the street.

Below we can see On it are three houses: The complete addresses for each of these houses is: There are different classifications, or types of IP addresses. A network can be public, or it can be private. Public IP addresses are accessible anywhere on the Internet. Private IP addresses are not, and most are typically hidden behind a device with a public IP address. Here we can see an example—a street with two buildings with public IP addresses—representing computers with addresses that are visible to the entire Internet.

These buildings might be anywhere in the world, but their addresses are complete, so we know exactly where they are and can send messages to them. We have a new building on the street.

That building has a public IP address, and a private IP address.

There is also a fence that blocks the rest of the Internet from seeing and passing messages to addresses on the street. The postal building controls messages that travel between the Internet and the street, keeping track of messages that leave the street, and directs return messages to the right house.

On the street, it has the address Activity: Find the IP addresses assigned to your computer, and your network. Download the file. I am very like this website to download many books. PramodYadav at Thanks to this website for the PDF easy download. Osarobo at I am very like this website. Because i can download many books for study. Sarikveasna at Udubo at The school can provide access to special purpose computing devices which individual users would not normally own.

For example, a school network might have high-speed high quality printers strategically located around a campus for instructor or student use. Flexible Access. School networks allow students to access their information from connected devices throughout the school. Students can begin an assignment in their classroom, save part of it on a public access area of the network, then go to the media center after school to finish their work.

Students can also work cooperatively through the network. Workgroup Computing.

Computer Network Tutorial

Collaborative software allows many users to work on a document or project concurrently. For example, educators located at various schools within a county could simultaneously contribute their ideas about new curriculum standards to the same document, spreadsheets, or website. Large campus networks can carry hefty price tags.

Cabling, network cards, routers, bridges, firewalls, wireless access points, and software can get expensive, and the installation would certainly require the services of technicians. But, with the ease of setup of home networks, a simple network with internet access can be setup for a small campus in an afternoon.

Top Networking Interview Questions & Answers

Requires Administrative Time. Proper maintenance of a network requires considerable time and expertise. Many schools have installed a network, only to find that they did not budget for the necessary administrative support.

Servers Fail. Although a network server is no more susceptible to failure than any other computer, when the files server "goes down" the entire network may come to a halt.

Good network design practices say that critical network services provided by servers should be redundant on the network whenever possible.

Cables May Break. The Topology chapter presents information about the various configurations of cables. Some of the configurations are designed to minimize the inconvenience of a broken cable; with other configurations, one broken cable can stop the entire network.

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