nishant kashyap

keep calm and love technology


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application layer in Networking

Application layer is the upper most layer in OSI and TCP model. It is the layer which is responsible for giving interface between two nodes for an application. there are a lot of protocols which are categorized into application layer.

protocols are:

1. DNS

2. HTTP

3. SMTP

4. POP

5. TELNET

6. FTP ETC.

In DNS ie. domain name system/service/server , As we know that every server has its own ip address . but it is too difficult to remember the ip address of every server . so for solution of this problem , DNS was introduced. with that computer can communicate by the URL OR URI of server.

in HTTP, whatever we are communicate by client (browser) and server or peer to peer , all are because of HTTP.