Networking Fundamentals Day 3

Which OSI layer does a switch primarily operate on?

• Layer 1

• Layer 2

• Layer 3

• Layer 4

Which OSI layer is responsible for data encryption and compression?

• Presentation

• Application

• Session

• Transport

At which OSI layer does a router operate?

• Physical

• Data Link

• Network

• Transport

Which layer handles end-to-end communication and error recovery?

• Session

• Transport

• Network

• Data Link

Which TCP/IP layer corresponds to the Application, Presentation, and Session layers of OSI?

• Internet

• Network Access

• Transport

• Application

In the TCP/IP model, IP belongs to which layer?

• Transport

• Application

• Internet

• Network Access

Which of the following is a well-known port?

• 21

• 8080

• 49512

• 65535

Which port does DNS use?

• 25

• 53

• 80

• 110

Which of the following is a dynamic/private port range?

• 0–1023

• 1024–49151

• 49152–65535

• 21–80

What is the primary function of a repeater?

• Converts analog to digital signals

• Regenerates and amplifies signals

• Filters data packets

• Assigns IP addresses