单项选择题
At which layer of the OSI model is RSTP used to prevent loops?（）
A. data link
B. network
C. physical
D. transport
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相关考题
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单项选择题
Which IPsec security protocol should be used when confidentiality is required?（）
A. PSK
B. AH
C. MD5
D. ESP -
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
