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單項選擇題

Which component of VPN technology ensures that data can be read only by its intended recipient?（）

A. data integrity
B. encryption
C. key exchange
D. authentication

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單項選擇題

An administrator attempts a traceroute but receives a "Destination Unreadable" message. Which protocol is responsible for that message?（）

A. RARP
B. RUDP
C. ICMP
D. SNMP

單項選擇題

When a host transmits data across a network to another host, which process does the data go through?（）

A. standardization
B. conversion
C. encapsulation
D. synchronization