The maximum number of data that can be expressed by 8 bits is（ ）．
A、64 
B、128 
C、255 
D、256 

Integration （ ）is the process of verifying that the components of a system work together as described in the program design and system design specifications．
A、trying 
B、testing 
C、checking 
D、coding 

GIF files are limited to a maximum of 8 bits/ I pixel，it simply means that no more than 256 colors are allowed in （ ） .
A、an image 
B、a file 
C、a window 
D、a page 

NAC's（Network Access Control）role is to restrict network access to only compliant endpoints and　（1）　users. However, NAC is not a complete LAN　（2）　solution; additional proactive and　（3）　security measures must be implemented. Nevis is the first and only comprehensive LAN security solution that combines deep security processing of every packet at l0Gbps; ensuring a high level of security plus application availability and performance．Nevis integrates NAC as the first line of LAN security　（4）　.In addition to NAC，enterprises need to .implement role-based network access control as well as critical proactive security measures一real-time, multilevel　（5）　inspection and microsecond threat containment.
（1）A、automated
B、distinguished
C、authenticated
D、destructed
（2）A、crisis
B、security
C、favorable
D、excellent
（3）A、constructive
B、reductive
C、reactive
D、productive
（4）A、defense
B、intrusion
C、inbreak
D、protection
（5）A、port
B、connection
C、threat
D、insurance