Data communication - Question and answer - 8

37. Explain different framing algorithms ?
Framing can be of two types, fixed sized framing and variable sized framing. Here the size of the frame is fixed and so the frame length acts as delimiter of the frame. Consequently, it does not require additional boundary bits to identify the start and end of the frame.

38. What is data link layer ?
The data link layer is the protocol layer in a program that handles the moving of data into and out of a physical link in a network. The data link layer also determines how devices recover from collisions that may occur when nodes attempt to send frames at the same time.

39. What is transport layer ?
In computer networking, the transport layer is a conceptual division of methods in the layered architecture of protocols in the network stack in the Internet protocol suite and the OSI model. The protocols of this layer provide host-to-host communication services for applications.

40. What is Point-to-Point Connection ?
A point-to-point connection is a direct link between two devices such as a computer and a printer. It uses dedicated link between the devices. The entire capacity of the link is used for the transmission between those two devices. Most of today's point-to-point connections are associated with modems and PSTN (Public Switched Telephone Network) communications. In point to point networks, there exist many connections between individual pairs of machines.

41. What is Protocol and Standards ?
Standards form the fundamental building blocks for product development by establishing consistent protocols that can be universally understood and adopted. This helps fuel compatibility and interoperability and simplifies product development, and speeds time-to-market.

42. What are the different layers in OSI Model ?
The 7 Layers of the OSI
Layer 7 - Application.
Layer 6 - Presentation.
Layer 5 - Session.
Layer 4 - Transport.
Layer 3 - Network.
Layer 2 - Data Link.
Layer 1 - Physical.

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