Questions Regarding the TCP/IP Network Model

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TCP/IP is a network model which enables the communication across the Internet. The most fundamental protocol on which the Internet is built. This is made up of the 2 common networking protocols, TCP, for Transmission Control Protocol, and IP, for Internet Protocol. TCP maintains and handles packet flow linking the systems and IP protocol has the ability to handle the routing of packets. However The TCP/IP stack consists of 5 layers first being application layer, the transport layer, then the network layer, the link layer and finally the physical layer. The assignment focuses on the three middle layers and is divided into five parts. Firstly explaining how the TCP and UDP the most vital protocols needed to deliver and communicate. Explain how the two important transport protocols deliver messages on behalf of the application and discuss the differences between them The TCP/IP is the most important internet operation protocol in the world. While IP protocol performs the mass of the functions which is needed for the internet to work. It does not have many capabilities which are essential and needed by applications. In TCP/IP model these tasks are performed by a pair of protocols that operate at the transport layer. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP). These two protocols are vital when it comes to delivering and managing the communication of numerous applications. To pass on data streams to the proper applications the Transport layer must identify the target application. First, to be able to attain this, Transport layer assigns an application an identifier. In the TCP/IP model call this identifier a port number. Every individual software process needing to access the network is assigned a un... ... middle of paper ... ...e or program can capture vital and sensitive personal information that is a source of misleading a person in many ways restricting them of privacy, identity theft, and other problems it mainly turns of the filter so it sees everything. Harmful usage of a sniffer is catching password and also capturing special and private information of transactions, like username, credit ID, account, and password, recording sending of email or messages and resuming the information, Some Sniffers have the ability to modify the computer's information also to the extent of even damaging the system. Weakening the security of a network even being successful in gaining higher level authority. With everyday more and different hackers using of packet sniffers, it has become one of the most important tool in the defence of cyber-attacks and cyber-crime. Writted by (2001 – 2014) Colasoft LLC

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