Internet is a network of interconnected networks. This network has ()
A. people
B. computers
C. a information
D. software
第1题
Bluetooth is a proposed Radio Frequency specification for ()
A. short range
B. point-to-multipoint voice
C. data transfer
D. modem
第2题
There are two types of encryption:()
A. secret key
B. double keys
C. missing key
D. public key
第3题
Getting to a U.S. site from outside this country is quite ()
A. transparent
B. instantaneous
C. complicated
D. accurate
第4题
the Amazon.com business model combines()
A. direct marketing
B. the intermediary role
C. virtual community
D. content provider
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