REPORT ON COMPUTER NETWORKING AND COMMUNICATION PDF

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1 REPORT ON COMPUTER NETWORKING AND COMMUNICATION Harshavardhan Dyavath ID:201551043 Student, IIIT Vadodara Abstract—Computer networks have become increasingly ubiquitous. However, with the increase in networked applications, there has also been an increase in difficulty to manage and secure these n...

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REPORT ON COMPUTER NETWORKING AND COMMUNICATION Harshavardhan Dyavath ID:201551043 Student, IIIT Vadodara Abstract—Computer networks have become increasingly ubiquitous. However, with the increase in networked applications, there has also been an increase in difficulty to manage and secure these networks. The proliferation of 802.11 wireless networks has heightened this problem by extending networks beyond physical boundaries. We propose the use of spectral analysis to identify the type of wireless network interface card (NIC).Computer networks are a system of interconnected computers for the purpose of sharing digital information. The concept of a network began in 1962 when a server at the Massachusetts Institute of Technology was connected to a server in Santa Monica, California. Since that time the proliferation of computers and computer networks has increased significantly. One of the most significant challenges to networks is attacks on their resources caused by inadequate network security. The purpose of this research project was to evaluate open source, free, intrusion detection systems and how easily they can integrate into an existing network. Research was conducted for this study through a review of existing literature pertaining to intrusion detection systems and how they function. The literature also highlighted previous studies conducted on intrusion detection systems, both commercial and open source. Index Terms—Computer networks,internet,data communication.

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I NTRODUCTION

Today the world scenario is changing. Data Communication and network have changed the way business and other daily affair works. Now, they rely on computer networks and internetwork. A set of devices often mentioned as nodes connected by media link is called a Network. A node can be a device which is capable of sending or receiving data generated by other nodes on the network like a computer, printer etc. These links connecting the devices are called Communication channels.computer network is mainly derived from the iso and osi layers.The best we can give a breif is internet. Computer network is a telecommunication channel through which we can share our data. It is also called data network. The best example of computer network is Internet. Computer network does not mean a system with control unit and other systems as its slave. It is called a distributed system A network must be able to meet certain criteria, these are mentioned below: 1) 2) 3) 1.1

Performance Reliability Scalability Performance

It can be measured in following ways : Transit time : It is the time taken to travel a message from one device to another. Response time : It is defined as the time elapsed between enquiry and response. Other ways to measure performance are : 1) 2) 3)

Efficiency of software Number of users Capability of connected hardware

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Reliability

It decides the frequency at which network failure take place. More the failures are, less is the network’s reliability. 1.3

Security

It refers to the protection of data from the unauthorised user or access. While travelling through network, data passes many layers of network, and data can be traced if attempted. Hence security is also a very important characteristic for Networks.

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P REREQUISITES

Students need an introductory course in probability, a strong understanding of binary numbers, bits and bytes, and knowledge of how computers lay out data in memory. They should also be comfortable with algebra.

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A DVANTAGES

Computer networks allow companies to store information on databases that employees can access. Employees working on documents can store them on centralized databases because they’re easier to back up than individual workstations. Internal cloud solutions can also aid in collaboration by allowing multiple employees to work on the same items in real time. Networks also make sharing hardware simpler. Most printers and scanners, for example, can be connected to a network that enables companies to avoid having to buy more printers than necessary. Networks also allow employees to communicate with each other. Internal email and instant messaging have become popular means of communication. Voice-over-Internet-protocol (VOIP) solutions allow

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companies to use their existing networking equipment to provide internal phone service. Networks can be configured to implement various safeguards. Internal spam filters can save employees time, and virus scanners can check emails for viruses and other malware. A network can also block certain websites; schools often use this capability to keep students from accessing inappropriate material when using the school’s network. TABLE 1 OSI Layering in Computer networks

S . NO

[1] [2] [3] [4] [5] [6] [7]

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OSI MODEL LAYERS Application layer Presentation layer Session layer Transport layer Network layer Datalink layer Physical layer

TCP/IP PROTOCOL ARCHITECTURE Application layer Host to host trasnport layer Internet layer Network interface layer

C ONCLUSION

Computer communication, it seems, will become a much more useful networking tool when large numbers of people with similar interests acquire access to the technology. Though it can expedite the formation of new interpersonal networks by overcoming the space and time barriers faced by traditional networking techniques, it still requires a great deal of concentrated effort and resources to get the people to use it. This problem should become increasingly minimized over the coming years as the technological innovations become more diffused throughout society. The Native Computer Communications Network Project was a good example of how a focus on creating a network of computers does not necessarily ensure the interpersonal networking of the potential users of that technology. If the people were not communicating with each other before, developing another method of communication doesn’t mean they’ll start. Computer networks tells us a draft information on which the current world has been devoloping in networking scheme.It also gives us wide information about Wifis,Wlans in which today world is busy and widely using.

R EFERENCES [1] Kalyan Shashidar . Sir, Lectureres, lecturer of DAIICT and Staff of IIIT Vadodara....