Routers operate at which layer of the OSI model?

• physical

• network

• transport

• data link

Bits are packaged into frames at which layer of the OSI model?

• data link

• transport

• physical

• presentation

The layers of the OSI model, from the top down, are:

• application, presentation, session, transport, network, data link, physical

• session, presentation, data transport, MAC, network, physical

• physical, data link, network, transport, session, presentation, application

• presentation, application, session, network, transport, data link, physical

Which of the following are transport layer protocols?

• IP and TFTP

• IP

• FTAM

• TCP and UDP

Which of the following are considered to be the upper layer protocols?

• presentation and session

• application and presentation

• application, presentation, and session

• application, presentation, session, and transport

Encryption takes place at which layer?

• application

• session

• presentation

• transport

The network layer uses physical addresses to route data to destination hosts.

• TRUE

• FALSE

Which layer establishes, maintains, and terminates communications between applications located on different devices?

• application

• session

• presentation

• network

IP is implemented at which OSI model layer?

• transport

• session

• data link

• network

Packets are found at which layer?

• data link

• transport

• network

• session