单项选择题The technician notices that one of the wires in a CAT5 cable is cut in half. Which of the followingconnectivity issues did the technician discover?()

A.Open pairs
B.Attenuation
C.Crosstalk
D.Interference


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1.单项选择题Which of the following cable types is intended to be used on short distances and is immune to anytype of interference?()

A. Singlemode fiber
B. Multimode fiber
C. Shielded twisted pair
D. Unshielded twisted pair

5.单项选择题An administrator replaced a router with a switch. End users are able to access network shares butare not able to access the Internet. Which of the following is the BEST explanation why the usersare unable to access the Internet?()

A. Router routes traffic between different networks and a switch does not
B. The new switch is faulty and needs to be replaced and configured correctly
C. The firewall needs to be setup to allow traffic to reach the Internet
D. The switch needs to be setup to forward data traffic to the Internet

10.单项选择题Which of the following DNS record types provides the hostname to IP address mapping?()

A. A record
B. NS record
C. CNAME record
D. MX record

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