OSI (Open System Interconnection)

Question 1

Layer 7

Answer 1

Application layer
closest to the user
Interacts with software such as brave, chrome etc.
Http and Https are layer 7 protocol
Https://www.cisco.com
-identity communication partners
Synchronizing communication

Question 2

Layer 6

Answer 2

Presentation layer
Data is in application format, a format that application understands
Translate between applications and network formats
Encryption of data as it sent, and decryption as it received

Question 3

Layer 5

Answer 3

Session layer
Establish the connection of host to host

Question 4

Layer 4

Answer 4

Transport layer
TCP/IP, UDP etc.
Ensure that data is sent
Creates a segment by putting L4 header on data

Question 5

Layer 3

Answer 5

Network layer
Where routers, and sometimes switch that has routing capabilities operates
IP Address
Creates a packet by adding L3 header of the segment

Question 6

Layer 2

Answer 6

Data Link
Where switch operates
MAC (media access control)
Creates a frame by adding L2 header and L2 trailer.

Question 7

Layer 1

Answer 7

Physical layer
Cables