osi

Question 1

What is the OSI Model

Answer 1

A conceptual framework that describes how data is transmitted between devices over a network

Question 2

What are the 7 layers

Answer 2

1. Physical Layer
2. Data link Layer
3. Network Layer
4. Transport Layer
5. Session Layer
6. Presentation Layer
7. Application Layer

Question 3

What does the physical layer do

Answer 3

Adapts bits for transmission over the medium

Question 4

Application Layer

Answer 4

Support for e mail, file transfer, etc

Question 5

Presentation Layer

Answer 5

Data represention

Question 6

What is layer number 5, 7 and 3

Answer 6

5.Sesssion
7. Application
3. networks
4

Question 7

what are layers 1, 2, 4 and 6

Answer 7

1. Physical
2. Data link
3. Transport
4. Presentation

Question 8

Session Layer

Answer 8

Control the diologs (who talks to them)

Question 9

Transport Layer

Answer 9

End to end data integrity -TCP, UDP

Question 10

Data Link Layer

Answer 10

Deliver frames

Question 11

Network Layer

Answer 11

Internet packet addressing, routing, and segmentation (WAN, IP, X.25)

Question 12

Describe how emails are sent by protocols

Answer 12

1. Data that contains the email message is split into packets by the TCP
2. The router inspects elements headers from each packet and determines the most efficient path
3. The tcp portion of TCP/IP reassembles the packets in the correct order and ensures that all the packets have arrived undamaged

Question 13

What is the algorithm stopping condition

Answer 13

When a device successfully transmits data without detecting a collision
It is considered complete when the data is continued to be sent without interference