单项选择题

Log messages are appearing very quickly on the console of your ERX Edge Router. Which Privileged Exec command disables real-time console logging？（）

A. no log here
B. no log console
C. destination console severity 7
D. destination console logging off

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单项选择题

Which command displays the results of a loopback test you executed on a CT3 line module in slot 5，port 0，t1 number 4？（）

A. show interface 5/0：4
B. show interface 5/0：4/1
C. show controllers t3 5/0：4
D. show controllers t3 5/0：4/1

单项选择题

What is the purpose of the OSPF hello packet？（）

A. advertises reachable networks
B. acknowledges the receipt of update packets
C. establishes and maintains neighbor relationships
D. describes the contents of the link-state database

多项选择题

What are the three OSPF authentication methods supported on the ERX Edge Router？（）

A. null password
B. simple password
C. message digest 5
D. Password Authentication Protocol
E. Challenge Handshake Authentication Protocol