According to law, taxable services refer to transportation,() finance, insurance and the like. 
A、operation
B、construction
C、introduction
A、operation
B、construction
C、introduction
A、A.gift certificates B、B.marketing campaigns C、C.merchandising associations D、D.loyalty programs
A、to make VTP easier to implement B、to isolate broadcast traffic C、to increase the size of the collision domain D、to allow more devices to connect to the network E、to logically group hosts according to function F、to increase network security
A、Level 1 internal routes B、Level 1 external routes C、Level 2 internal routes D、Level 2 external routes