單項(xiàng)選擇題

At which of the following layers does the TFTP protocol operate?（）

A.Layer 1
B.Layer 4
C.Layer 5
D.Layer 7

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單項(xiàng)選擇題

Which of the following is a multifunction device in a SOHO network?（）

A. Bandwidth shaper
B. Proxy server
C. Wireless router
D. Load balancer

單項(xiàng)選擇題

Which of the following utilities can be used to list the routing table?（）

A.ipconficj
B.nslookup
C.netstat
D.dig

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