OSI Model

Question 1

What is (5) Session Layer?

Answer 1

Way apps communicate across network.

Question 2

What are 3 modes of Session Layer?

Answer 2

One-Way/Simplex
TWA/ Half Duplex
TWS/Duplex

Question 3

What is One-Way/Simplex?

Answer 3

Layer 5

only 1 system is allowed to send messages. The other just receives them.

Question 4

What is Two-Way Alternative/ half duplex?

Answer 4

Layer 5

Host has system to take turns to send messages. (exchanging tokens).

Question 5

What is Two Way Simultaneous/Duplex?

Answer 5

Either host can send messages at anytime

Question 6

Physical Layer 1

Answer 6

physical stuff like copper cables and fibre optic

Question 7

Data Link Layer 2

Answer 7

works with MAC address.
NIC and Switches
Ethernet
Switching

Question 8

Network Layer 3

Answer 8

Logical Addresses: IP address and routers
smaller packets.
moves data
routing

Question 9

Transport Layer 4

Answer 9

End-to-End
TCP or UDP
Disassembles packets
Gives Port numbers

Question 10

Application Layer 6

Answer 10

supports apps requiring network services

uses File Transfer, printing, email, databases etc