Computer Network - quiz 2

The physical layer is concerned with the movement of ______ over the physical medium.

• programs

• dialogs

• protocols

• bits

In OSI model, as a data packet moves from the lower to the upper layers, headers are ________

• added

• removed

• rearranged

• modified

In the OSI model, what is the main function of the transport layer?

• node to node delivery

• process to process message delivery

• syncronization

• updating and maintenance of routing tables

In the OSI model, encryption and decryption are functions of the ____ layer

• transport

• session

• presentation

• application

When a host on network A sends a message to a host on network B, which address does the router look at?

• port

• logical

• physical

• none of the above

To deliver a message to the correct application program running on a host, the ____ address must be consulted

• port

• IP

• physical

• none of the above

A port address in TCP/IP is ____ bits long.

• 32

• 48

• 16

• none of the above

The _____ created a model called Open system Interconnection, which allows diverse systems to communicate.

• OSI

• ISO

• IEEE

• none of the above

The _______ layer is responsible for the source to destination delivery of a packet across multiple network links.

• transport

• network

• data link

• physical

The _______ layer is responsible for delivering data units from one station to the next without errors.

• transport

• network

• data link

• physical