As a CCNA candidate，you must have a firm under standing of the IPv6 address structure.Refer to IPv6 address，could you tell me howm any bits are included in each filed？（）
第1题：
As a CCNA candidate, you must know the various layers of the OSI model. At which layers of the OSI Model do Wide Area Networks operate in? (Choose two)
A. Physical Layer
B. Datalink Layer
C. Network Layer
D. Session Layer
E. Transport Layer
F. Presentation Layer
G. Application Layer
第2题：
A.24
B.4
C.3
D.16
第3题：
______(win)the presidency，a candidate must receive at least 270 votes. an electoral majority.
第4题：
As a CCNA candidate,you must have a firm understanding of the IPv6 address structure.Refer to IPv6 address,could you tell me how many bits are included in each filed?（）
第5题：
If your radiotelephone fails while underway，______．
A.you must visually signal oncoming vessels
B.you must immediately tie up in the nearest port until the radiotelephone is repaired
C.you must anchor until the radiotelephone is repaired
D.the loss of the radiotelephone must be considered in navigating the vessel
第6题：
A. set
B. copy candidate active
C. apply-config
D. commit
第7题：
A.24
B.4
C.3
D.16
第8题：
As a CCNA candidate, you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model? (Choose two)
A. TCP
B. Telnet
C. FTP
D. Ping
E. IP
F. UDP
第9题：
You work as the enterprise exchange administrator at Xxx .The Xxx network is running in a Microsoft Exchange Server 2010 environment.A SMTP server on the Internet has rejected some email sent from Xxx .What actions must you take to determine why this happened？（）
第10题：
As a candidate for CCNA examination， when you are familiar with the basic commands， if you input thecommand "enable secret level 5 password" in the global mode ， what does it indicate？（）