Volume 2

The process-to-process delivery of the entire message is the responsibility of the ___________

layer.

• network

• transport

• data link

• physical

The ____________________ layer is closest to the transmission medium.

• network

• transport

• data link

• physical

E-mail services are available to users through the _______________ layer.

• application

• presentation

• session

• tranport

When independent networks or links are connected to create an internetwork, the

connecting devices:

• always reformat the encapsulated message.

• route or switch the packets to their final destination.

• immediately forward all incoming messages along to the destination address without reading the destination address.

• None of the above.

The information contained in the data link layer allow for:

• framing or dividing the stream of bits into data units called frames.

• flow control ensuring that the data rate timing between sender and receiver is

  maintained.

• physical addressing providing node to node information.

• All of the above.

The physical layer defines the:

• characteristics of the interface between the devices and the transmission media.

• acceptance of encoded electrical or optical signals.

• type of transmission medium.

• All of the above.

The _______________ layer changes streams of bits into electromagnetic signals.

• data link

• physical

• session

• network

When data are transmitted from computing device A to computing device B, the

header from A's layer 3 is read by B's ____________ layer.

• application

• transport

• data link

• network

On the incoming side of the internetwork, as the data packet moves from the lower to the upper layers, headers are _______________.

• added

• subtracted

• rearranged

• modified

The _____________ basic function is to convert the data intended for or received from the application layer into another format.

• Transport Layer

• Session Layer

• Presentation Layer

• Application Layer