Data Communications Reviewer for UT1

Which of the following describes the function of a WAN?

• a. connects peripherals in a single location.

• b. connects multiple networks in a single building.

•  c.  provides connectivity over a large geographic area.

• d. provides connectivity on a LAN.

During the initial configuration of a 1841 series Cisco router, which cable is required for connecting a PC to the console port?

• a. twisted.

• b. crossover

• c. rollover.

• d. straight

During the encapsulation process, what occurs at the data link layer?

• a. No address is added.

• b. The logical address is added.

• c. The physical address is added.

• d. The process port number is added.

  Which class of IP address has the most host addresses available by default?

• a. A

• b. B

• c. C

• d. A and B

What is the main reason the OSI model was created?

• a. To create a layered model larger than the TCP/IP model

• b. So application developers can change only one

  layer’s protocols at a time

• c. So different networks could communicate

• d. So cisco could use the model

Where is a hub specified in the OSI model?

• a. Session Layer

• b. Physical Layer

• c. Data Link Layer

• d. Application Layer

Which layer encapsulates the segment into packets?

• a. physical

• b. data link

• c. transport

• d. network

Which statements is not correctly identifying the role of intermediary devices in the network?

• a. determine pathways for data

• b. retime and retransmit data signals.

• c. manage data flows

• d. initiate data communications.

What can be identified by examining the network layer header?

• a. the destination device on the local media

• b. the bits that will be transferred over the media

• c. the source application or process creating the data

• d. the path to use to reach the destination host

What is the proper order of the layers of the OSI model from the highest layer to the lowest layer?

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

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

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

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