What are two characteristics of the CSMA/CD access method? (Choose two.)

• A.It checks to see if a collision has been detected.
• B.It does a round robin search for requests to transmit from all nodes on the network.
• C.It signals its intent to transmit on the network.
• D.It waits until the transmission medium is idle.

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What is the purpose of a Media Access Control (MAC) address?

• A.identify a network device to the Internet
• B.uniquely identify a physical network device
• C.manage permissions for shared network resources
• D.provide a routing address on a local area network (LAN)

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What port does DNS use?

• A.51
• B.443
• C.53
• D.389

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This question requires that you evaluate the underlined text to determine if it is correct.
A "secondary zone" is the first DNS zone to which all updates for the records that belong to that zone are written.
Select the correct answer if the underlined text does not make the statement correct. Select 'No change is needed" if the underlined text makes the statement correct.

• A.Primary zone
• B.Stub zone
• C.Conditional forwarding zone
• D.No change is needed.

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This question requires that you evaluate the underlined text to determine if it is correct.
Every router today is TCP/IP enabled, which is an industry-standard protocol that you use on the Internet and for local addressing.
Select the correct answer if the underlined text does not make the statement correct. Select 'No change is needed" if the underlined text makes the statement correct.

• A.HTTP
• B.FTP
• C.No change is needed
• D.SNMP

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