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單項選擇題

Which of the following is the MOST likely authentication scheme used in 802.1x?（）

A.CHAP
B.RADIUS
C.TACACS+
D.Kerberos

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單項選擇題

In an environment with STP disabled, which of the following is the MOST likely cause of the exponential increase in repeated packets transferred through the network?（）

A. Incorrect subnet mask
B. Mismatched MTU
C. Switching loop
D. VLAN mismatch

單項選擇題

Users are reporting problems connecting to servers in the remote company.com domain. The administrator suspects this to be a DNS problem.
Which of the following commands would the administrator run to identify the DNS server of the remote company.com?（）

A. dig company.com ns
B. ipconfig/all
C. ifconfig-a
D. dig company.com mx