CompTIA Network+ - OSI Model

The Open Systems Interconnection (OSI) model consists of:

• 7 Layers

• 3 Layers

• 4 Layers

• 6 Layers

Physical layer of the OSI model is also known as:

• Layer 2

• Layer 7

• Layer 3

• Layer 1

Which of the following protocols reside at the application layer of the OSI model? (Select 3 answers)

• ATM

• HTTP

• FTP

• IP

• SMTP

Which of the terms listed below refers to the OSI network layer?

• Layer 1

• Layer 2

• Layer 3

• Layer 4

Layer 6 of the OSI model is also referred to as:

• Data link layer

• Session layer

• Presentation layer

• Transport layer

In the OSI model, physical addressing takes place at the:

• Data link layer

• Layer 4

• Physical layer

• Session layer

Which of the following reside at the physical layer of the OSI model? (Select 2 answers)

• Router

• Hub

• Switch

• Network cabling

• Firewall

Character encoding, data compression and encryption/decryption take place at the:

• Application layer of the OSI model

• Presentation layer of the OSI model

• Session layer of the OSI model

• Transport layer of the OSI model

Which OSI layer assumes responsibility for managing, establishing, and ending network connections between applications?

• Network layer

• Data link layer

• Application layer

• Session layer

What is the name of a protocol data unit (PDU) used at the OSI physical layer?

• Frame

• Segment

• Bit

• Packet