FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -4. Which layer is used to link the network support layers and user support layers? Explanation: Physical, data link and network layers are network support layers and session, presentation and application layers are user support layers. The transport layer links these layers by segmenting and rearranging the data.

Detailed explanation-2: -The network layer is layer 3 in the OSI model, and it is responsible for connections between different networks.

Detailed explanation-3: -The data link layer provides the services within a single network while the transport layer provides the services across an internetwork made up of many networks. The data link layer controls the physical layer while the transport layer controls all the lower layers.

Detailed explanation-4: -As mentioned earlier, TCP is the most common transport layer protocol. It is used by many application layer protocols like the HyperText Transfer Protocol (HTTP) and FTP. TCP was designed to provide reliable service on top of the unreliable network layer provided by IP.

Detailed explanation-5: -The 7 layers of the OSI model. The layers are: Layer 1-Physical; Layer 2-Data Link; Layer 3-Network; Layer 4-Transport; Layer 5-Session; Layer 6-Presentation; Layer 7-Application.