OSI reference model

Question 1

is the OSI layer that is closest to the user. It provides network services to the user’s applications such as spreadsheet programs, word processing programs, and bank terminal programs.

• The … laer establishes the availability for intended communication partners, synchronizes and establishes agreement on procedures for error recovery and control of data integrity

Answer 1

Layer 7: Application Layer

Question 1

is a descriptive network scheme. The … model describes how information or data makes it way from application programs through network medium to another application program located on another network.

Answer 1

Open Systems Interconnection (OSI) model

Question 2

ensures that the information that the application layer of one (1) system sends out is readable by the application layer of another system.

• If necessary, the … layer translates between multiple data formats by using a common format. Provides encryption and compression of data. Examples: JPEG, MPEG, ASCII, HTML

Answer 2

Layer 6: Presentation Layer

Question 3

defines how to start, control, and end conversations (called sessions) between applications. It also synchronizes dialogue between two (2) hosts’ presentation layers and manages their data exchange.

Answer 3

Layer 5: Session Layer

Question 4

regulates information flow to ensure end-to-end connectivity between host applications reliably and accurately. This layer segments data from the sending host’s system and reassembles the data into a data stream on the receiving host’s system.

Answer 4

Layer 4: Transport Layer

Question 5

defines end-to-end delivery of packets. It defines how routing works and how routes are learned so that the packets can be delivered.

Answer 5

Layer 3: Network Layer

Question 6

provides access to the networking media and physical transmission across the media and this enables the data to locate its intended destination on a netowkr

Answer 6

Layer 2: Data Link Layer

Question 7

The data link layer provides reliable transit of data across a physical link by using the

Answer 7

Media Access Control (MAC) addresses

Question 8

deals with the physical characteristics of the transmission medium. It defines the electrical, mechanical, procedural, and functional specifications for achieving, maintaining, and deactivating the physical link between end systems.

Answer 8

Layer 1: Physical Layer.