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Complete 2 page APA formatted essay: Memo.

A gateway is a program or a device that allows the networks to communicate with each other. It is also referred as a marketing term and considered in a broader context. Gateways mostly operate at transport layer and also at application layer. But routers never operate at level 7 (Sosinsky, 231).

A set of protocols that is responsible for securing the packet processing at network layer in a network communication is known as Internet security protocol. IPsec is integrated in IPv6 as well as in IPv4 older version.

In this paper, fundamental concepts of advance networking have been described. Difference between UDP and TCP has been explained. Application layer protocols FTP, HTTP and SMTP are discussed with the related features. Differences between IPv4 and IPv6 also showed the advantages of new IPv6 over the older version IPv4. Major functions of router as path selection and data forwarding are also


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