ICT Networking Models and Protocols 2

Question 1

Which OSI layer is responsible for establishing, maintaining, and terminating communication sessions between applications?

Accepted Answer

Session layer

Answer

The Session layer (Layer 5) manages dialog control and synchronization between communicating systems.

Question 2

In the TCP/IP model, which layer corresponds most closely to both the OSI Session and Presentation layers?

Accepted Answer

Application layer

Answer

The TCP/IP Application layer combines the functions of the OSI Application, Presentation, and Session layers.

Question 3

What is the primary purpose of the Presentation layer in the OSI model?

Accepted Answer

Data encryption, compression, and format translation

Answer

The Presentation layer (Layer 6) handles data formatting, encryption, and compression so the Application layer can interpret the data.

Question 4

Which protocol operates at the OSI Network layer and is responsible for logical addressing and routing?

Accepted Answer

IP

Answer

IP (Internet Protocol) operates at Layer 3 and handles logical (IP) addressing and routing of packets.

Question 5

A network technician needs to capture and analyze packets on a network segment. Which OSI layer do packet sniffers primarily operate at?

Accepted Answer

Layer 2 – Data Link

Answer

Packet sniffers capture frames at the Data Link layer (Layer 2), though they can decode information from all encapsulated layers.

ICT - Information Communication Technology Practice Test