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單項選擇題

Which of the following is used by RADIUS to encrypt messages between the server and the client?（）

A. Public key
B. CSU/DSU
C. Private key
D. Shared secret

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單項選擇題

Which of the following is an EGP routing protocol?（）

A.IGP
B.OSPF
C.BGP
D.RIP

單項選擇題

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

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