COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK TOPOLOGIES AND PROTOCOLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Application
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Transport
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Internet
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Data link
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Detailed explanation-1: -The application layer is used by end-user software such as web browsers and email clients.
Detailed explanation-2: -HTTP is an application layer request response protocol that is used to access Web pages over the Internet. The Web client process uses a randomly assigned TCP port above 1023 to send HTTP request messages over TCP to a Web server that is typically listening at the well-known TCP port 80.
Detailed explanation-3: -Layer 7 is the layer most people are familiar with because it communicates directly with the user. An application that runs on a device might communicate with other OSI layers, but the interface runs on layer 7. For instance, an email client that transfers messages between client and server runs on layer 7.
Detailed explanation-4: -SMTP. SMTP stands for Simple Mail Transfer Protocol. It is connection oriented application layer protocol that is widely used to send and receive email messages.
Detailed explanation-5: -Application. The application layer concerns the networking processes at the application level. This layer interacts directly with end-users to provide support for email, network data sharing, file transfers, and directory services, among other distributed information services.