In the following applications, which one is a loss-tolerant application?( )
A. E-mail
B. file transfer
C. instant messaging
D. real-time audio
查看答案
In the following applications, which one is a bandwidth-sensitive application?( )
A. E-mail
B. web application
C. real-time audio
D. file transfer
The service of TCP can't guarantee ( ).
A. delivery of all data without error
B. delivery of all data in the proper order
C. the rate of delivery
D. congestion control
In the following applications, which one uses UDP?( )
A. E-mail
B. web application
C. file transfer
DNS
In the following descriptions about HTTP, which one is not correct?( )
A. HTTP uses UDP as its underlying transport protocol.
B. HTTP uses TCP as its underlying transport protocol.
C. HTTP is a stateless protocol.
D. HTTP is client-server architecture.
微信支付 
支付宝支付