Chapter8 3

Computer in a CSMA/CD network?    ^

OComputers receive a token that allows them to send a message. They then pass the token to the next Computer.

0Computers listen to the network for clearance to send data.

OEach Computer that is connected to the network transmits data on a different freguency.

O Each time slot on the network is allocated to a different Computer. A Computer can only transmit in the allocated time slots.

11    Which network topology will allow all devices to continue to communicate with each other should a network cable fail?

Obus

Oextended star ®mesh O ring O star

12    Which layer of the OSI model is primarily concerned with accessing the physical media and physical addressing?

O Application ®Data Link O Network O Physical OPresentation

13    A company is investigating the use of an ISDN seiviceto actas backup for the ASDL service they use to communicate with branch offices. They discover that the ISDN BPI sen/ice uses two 64 kb/s B channels.

Which function do the B channels perform?

Operform basie addressing O pass control information ®carry the data stream Obroadcast timing data

14    Which wireless IEEE standard operates in a radio freguency of 2.4 GHz and supports a maximum bandwidth of 54 Mbps?

0802.11a 0802.11b 0802.11g 0802.11z

15    Which three factors are reasons to choose a client/server model for a network instead of peer-to-peer?

(Choose three.)

□The network is smali with less than eight users.

□The company network reguires secure access to confidential information.

□The users need a central database to storę inventoiy and sales information.

□    Each user understands how to safely share files across a network.

□The data gathered by the employees is critical and should be backed up on a regular basis.

□    All employees passed a strict background check as part of the corporate hiring practices.

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