Network core does not include () .
A. routers
B. packet switches
C. links
D. smart phones
查看答案
Which tool can capture network packets and display that packet data? ( )
A. Internet Explorer
B. Wireshark
C. FileZilla
D. Firefox
Two packets A and B are sent in the order A-B and will traverse a connectionless communication network. They will arrive at the destination ().
A. in any order, after having traversed the same route
B. in the order A-B, after possibly having traversed different routes
C. in any order, after possibly having traversed different routes
D. in the order A-B, after having traversed the same route
The service of TCP is（ ）.
A. connectionless transmission
B. unreliable data transmission
C. datagram
D. reliable data transmission
The UDP segment includes （ ）.
A. checksum
B. receive window
C. sequence number
D. acknowledgement number
微信支付 
支付宝支付