CompTIA Network+ Network+ OSI Model and Data Encapsulation 2

Question 1

A network engineer is troubleshooting a connectivity issue and finds that MAC addresses are not being resolved correctly. Which OSI layer is responsible for MAC address resolution?

Accepted Answer

Data Link layer

Answer

Network layer

Answer

Physical layer

Answer

Transport layer

Question 2

During data encapsulation, what term describes the data unit at the Transport layer?

Accepted Answer

Segment

Answer

Frame

Answer

Packet

Answer

Bit

Question 3

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

Accepted Answer

Session layer

Answer

Presentation layer

Answer

Application layer

Answer

Transport layer

Question 4

A packet is received with a TTL value of 0. Which OSI layer processes TTL and causes the packet to be discarded?

Accepted Answer

Network layer

Answer

Data Link layer

Answer

Transport layer

Answer

Session layer

Question 5

Which layer of the OSI model converts data into a format suitable for transmission, including encryption and compression?

Accepted Answer

Presentation layer

Answer

Application layer

Answer

Session layer

Answer

Transport layer

Question 6

A technician captures network traffic and notices that data is being transferred using port 443. Which OSI layer is associated with port numbers?

Accepted Answer

Transport layer

Answer

Network layer

Answer

Data Link layer

Answer

Application layer

Question 7

In the OSI model, de-encapsulation occurs at the receiving host. In what order are headers removed?

Accepted Answer

Physical → Data Link → Network → Transport → Session → Presentation → Application

Answer

Application → Presentation → Session → Transport → Network → Data Link → Physical

Answer

Transport → Network → Data Link → Physical → Session → Presentation → Application

Answer

Network → Transport → Data Link → Session → Presentation → Application → Physical