Free ccna course tamil , osi layer , basic networking , Sk Computer Technologies

This free cccna course traininig video explains about osi layer models and its explanation OSI LAYER MODELS 7. Application Layer The application layer is used by enduser software such as web browsers and email clients. It provides protocols that allow software to send and receive information and present meaningful data to users. A few examples of application layer protocols are the Hypertext Transfer Protocol (HTTP), File Transfer Protocol (FTP), Post Office Protocol (POP), Simple Mail Transfer Protocol (SMTP), and Domain Name System (DNS). 6. Presentation Layer The presentation layer prepares data for the application layer. It defines how two devices should encode, encrypt, and compress data so it is received correctly on the other end. The presentation layer takes any data transmitted by the application layer and prepares it for transmission over the session layer. 5. Session Layer The session layer creates communication channels, called sessions, between de