单项选择题
Which of the following cables would a technician make in order to identify a physical interfaceproblem?（）
A.Serial
B.Loopback
C.Rollover
D.Console
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A network technician is installing a small wireless network. A requirement is that individual users must authenticate using usernames and passwords. Which of the following technologies would support users authenticating with encrypted usernames and passwords?（）
A.WPA TLS
B.WPA PEAP
C.64-bit WEP
D.128-bit WEP -
单项选择题
Which of the following utilities will produce the results printed below?（） Tracing route to 172.30.0.78 over a maximum of 30 hops . 1 <1 ms <1 ms172.30.0.78
A.tracert
B.ping
C.arp
D.netstat -
单项选择题
For an enterprise to use one of the reserved private IP address ranges, as best practice they shouldcoordinate with:（）
A.their legal department
B.IANA
C.IEEE
D.their IT department
