3 - Communications and Network Security

Which layer of the OSI Model is responsible for ensuring that the receiver can interpret Layer 7 information and translates information into formats?

• Layer 7: Application

• Layer 6: Presentation

• Layer 4: Transport

• Layer 5: Session

Answer explanation

Layer 6: Presentation is responsible for ensuring that the receiver can interpret Layer 7 information and translates information into formats.

Which layer of the OSI Model establishes a logical connection between two devices, ensures reliability, error correction, and flow control?

• Layer 4: Transport

• Layer 5: Session

• Layer 6: Presentation

• Layer 7: Application

Answer explanation

Layer 5: Session establishes a logical connection between devices, ensures reliability, error correction, and flow control.

Which layer of the OSI Model is responsible for higher layer data, TCP, and establishing addressing and routing information for data transfer?

• Layer 4: Transport

• Layer 3: Network

• Layer 2: Data Link

• Layer 1: Physical

Answer explanation

Layer 4: Transport is responsible for higher layer data, TCP, and establishing addressing and routing information for data transfer.

Which layer of the OSI Model organizes transmission bits into frames and interfaces with the protocol in the network layer?

• Layer 3: Network

• Layer 4: Transport

• Layer 2: Data Link

• Layer 1: Physical

Answer explanation

Layer 2: Data Link organizes transmission bits into frames and interfaces with the protocol in the network layer.

Which layer of the OSI Model describes the type of medium used for transmission, such as cable, fiber, or wireless?

• Layer 4: Transport

• Layer 1: Physical

• Layer 2: Data Link

• Layer 3: Network

Answer explanation

Layer 1: Physical describes the type of medium used for transmission, such as cable, fiber, or wireless in the OSI Model.

Which layer of the OSI Model is responsible for the collection of protocols governing Internet data exchange and the physical networking requirements?

• Layer 4: Transport

• Layer 5: Session

• Layer 6: Presentation

• Layer 7: Application

Answer explanation

Layer 4: Transport is responsible for the collection of protocols governing Internet data exchange and the physical networking requirements in the OSI Model.

Which layer of the OSI Model is associated with the Web Server, Client Browser, and protocols that support application communication?

• Layer 5: Session

• Layer 6: Presentation

• Layer 7: Application

• Layer 4: Transport

Answer explanation

Layer 7: Application is associated with the Web Server, Client Browser, and protocols that support application communication in the OSI Model.

Which layer of the OSI Model ensures that the receiver can interpret Layer 7 information and provides compression and encryption?

• Layer 5: Session

• Layer 6: Presentation

• Layer 7: Application

• Layer 4: Transport

Answer explanation

Layer 7: Application ensures the receiver can interpret Layer 7 information and provides compression and encryption.

Which layer of the OSI Model maintains a session during the transfer of data between applications and establishes a logical connection between two devices?

• Layer 7: Application

• Layer 6: Presentation

• Layer 5: Session

• Layer 4: Transport

Answer explanation

Layer 5: Session maintains a session during data transfer and establishes a logical connection between devices in the OSI Model.

Which layer of the OSI Model is responsible for transmission bits being organized into frames and identifying devices with MAC addresses?

• Layer 1: Physical

• Layer 2: Data Link

• Layer 3: Network

• Layer 4: Transport

Answer explanation

Layer 2: Data Link is responsible for organizing bits into frames and identifying devices with MAC addresses in the OSI Model.