An audio wave is a two-dimensional acoustic wave.()
第1题
A traditional private WAN can be ( ) to build and manage.
A、difficult
B、easy
C、cheap
D、expensive
第3题
( ) layer just above the internet layer.
A、Network Interface
B、TCP
C、Host-to-Host Transport
D、Application
第4题
( ) provides reliable, full-duplex connections and reliable service by ensuring that data is resubmitted when transmission results in an error.
A、TCP
B、ARP
C、UDP
D、IP
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