OSI Model

Question 0

Data Link (layer 2)

Answer 0

Media Access Control (MAC) and Logical Link Layer (LLC)

Controls how computers on network gain access to data and permission to transmit it

Frame synchronization, flow control, error checking

Question 1

Layer 1 of the OSI Model is?

Answer 1

Physical Layer: direct point to point data connection (NIC, cables, cards, etc

Question 2

Network (layer 3)

Answer 2

Switching and routing
Node to node data transmission
Routing and forwarding
Addressing, internetworking, error handling, congestion control and packet sequencing

Question 3

Transport (layer 4)

Answer 3

Transfers data between end systems and hosts
Ensures end to end error recovery and flow control
Ensures complete data transfer

Question 4

Session (layer 5)

Answer 4

Establishes, manages and terminates connections between applications

Question 5

Presentation (layer 6)

Answer 5

Translates data from application to network format and vice versa

Works to transform data into the form that the application layer can accept

Formats and encrypts data sent across the network

Question 6

Application (layer 7)

Answer 6

Supports application and end user processes

Everything here is application specific; file transfers, email, FTP, Telnet