OP2 MIDTERM EXAM P2

Which layer of the OSI model describes the interface between two applications on separate computers?

• Layer 1: Physical Layer

• Layer 5: Session Layer

• Layer 4: Transport Layer

• Layer 7: Application Layer

Which layer is responsible for reformatting, compressing, and/or encrypting data in a way that the application on the receiving end can read?

• Layer 5: Session Layer

• Layer 6: Presentation Layer

• Layer 3: Network Layer

• Layer 2: Data Link Layer

Which protocol is used by the Transport layer to guarantee delivery of data?

• UDP

• TCP

• SMTP

• HTTP

What is the principal protocol used by the Network layer?

• TCP

• FTP

• IP

• HTTP

Which layer is responsible for moving messages from one node to another until they reach the destination host?

• Layer 3: Network Layer

• Layer 7: Application Layer

• Layer 1: Physical Layer

• Layer 5: Session Layer

What is the technical name for a group of bits as it moves from one layer to the next and from one LAN to the next?

• Transmission

• Message

• Data Packet

• Protocol Data Unit (PDU)

Which addressing method is used to identify one application among several applications running on a host?

• MAC Address

• IP Address

• Port Number

• FQDN

What is the purpose of the Data Link layer in the OSI model?

• Responsible for transporting Application layer payloads

• Responsible for sending bits via transmission

• Responsible for interfacing with physical hardware on the local network

• Responsible for reformatting and encrypting data

Which layer is responsible for syncing data between applications and recovering messages if they don't arrive intact?

• Layer 4: Transport Layer

• Layer 5: Session Layer

• Layer 6: Presentation Layer

• Layer 2: Data Link Layer

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

• Responsible for moving messages from one node to another

• Responsible for sending bits via transmission

• Responsible for transporting Application layer payloads

• Responsible for reformatting, compressing, and/or encrypting data