單項(xiàng)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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2.單項(xiàng)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

3.單項(xiàng)選擇題A network admin wants to know every hop the packets take when he accesses cisco.com. Which command is the most appropriate to use?()

A. path cisco.com
B. debug cisco.com
C. trace cisco.com
D. traceroute cisco.com

4.單項(xiàng)選擇題Which line from the output of the show ip interface command indicates a layer 1 problem?()

A. Serial0/1 is up, line protocol is down
B. Serial0/1 is down, line protocol is down
C. Serial0/1 is up, line protocol is up
D. Serial0/1 is administratively down, line protocol is down

5.單項(xiàng)選擇題Which statement about IPv6 is true?()

A. Addresses are not hierarchical and are assigned at random.
B. Only one IPv6 address can exist on a given interface.
C. There are 2.7 billion addresses available.
D. Broadcasts have been eliminated and replaced with multicasts.

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