seminar on networking

8/4/2019 Seminar on Networking

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By:-Saurabh Vishnoi&

Ravinder Pal


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Overview

What is

networking?

Why is networkingimportant ?

Classification of

computer networking


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What is

Networking?

Networking is thesharing of informationand services.

Computer networkingprovides communicationtools to allow computersto share information andabilities .


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Why is

networking

important?

Information andcommunication are two of themost important strategicissues for the success of every

enterprise. While today nearly everyorganization uses a substantialnumber of computers andcommunication tools .

To overcome these obstaclesin an effective usage ofinformation technology,computer networks arenecessary ..


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Classification of

computer

networking

Network in smallgeographical Area (Room,Building or a Campus) is

called LAN (Local AreaNetwork) .

Network in a City is callMAN (Metropolitan

AreaNetwork) . Network spreadgeographically (Countryor across Globe) is called

WAN (Wide AreaNetwork) .


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OSI model

OSI stands for open systeminterconnection referencemodel.

The OSI model describehow information or data flowfrom one computer toanother by dividing withwhole process into suchsmaller & manageablesection or layer.

Each layer perform a welldefine function & provideservice to layer above orbelow it.


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CLIENT & SERVER

TCP IP ADDRESSING

DNS (DOMAIN NAME SERVER)

FTP(FILE TRANSFER PROTOCOL)

NETWORK SECURITY


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A network server is a computer designed toprocess requests and deliver data to other(client) computers over a local network or the

Internet. The clientserver model of computing is a

distributed application structure that partitionstasks or workloads between the providers of a

resource or service, called servers, and servicerequesters, called clients.


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IP address space is divided into mainlythree different classes:-

Class A 1 127

Class B 128 - 191 Class C 192 223

Private network Addresses :- Class A 10.0.0.0 - 10.255.255.255 Class B 172.16.0.0 - 172.31.255.255

Class C 192.168.0.0 - 192.168.255.255


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DNS SERVER

It basically resolves the IP-Addressses


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FTP is File Transfer Protocol .

It works on application layer of OSI Model .

FTP is used to transfer files from a client

Window machine to Linux server machine . In most of the cases we use FILEZILLA

software for file transfering.

FILEZILLA is the most convnient software usedfor uploading files from client to server.


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We all are looking for a secure networking .

Linux is the most secure operating system.

Therefore , most of the severs are using Linux

operating system. Hacking and Cracking are the two main terms

related with network security.

Hacking refers to the re-configuring or re-programming of a system to function in waysnot facilitated by the owner, administrator, ordesigner.


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A hacker is a person who is proficient with computersand/or programming to an elite level where they knowall of the in's and out's of a system.

There is NO illegality involved with being a hacker.

A cracker is a hacker who uses their proficiency forpersonal gains outside of the law.

EX: stealing data, changing bank accounts, distributingviruses etc.

What the hacker does with their knowledge of systems

within the definition of the law is what defines them as ahacker vs a cracker. It's then safe to say that all crackersare hackers, but not all hackers are crackers.

This is an important distinction.


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seminar on networking

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