单项选择题

Which IPsec security protocol should be used when confidentiality is required?()

A. PSK
B. AH
C. MD5
D. ESP

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单项选择题
which command allows you to verify the encapsulation type CISCO OR IETF for a frame relay link?()

A. show frame-relay map
B. show frame-relay lmi
C. show inter serial
D. show frame-relay pvc

单项选择题
What is the alternative notation for the IPV6 address B514:82C3:0000:0000:0029:EC7A:0000:EC72?()

A. B514:82C3:0029::EC7A:0000:EC72
B. B514:82C3:0029:EC7A:EC72
C. B514:82C3::0029:EC7A:0:EC72
D. B514:82C3::0029:EC7A:EC72

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