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Host A opens a Telnet connection to Host B. Host A then opens another Telnet connection to Host B. These connections are the only communication between Host A and Host B. The security policy configuration permits both connections. How many flows exist between Host A and Host B? ()

单选题
2022-05-23 04:45
A、1
B、2
C、3
D、4
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正确答案
D

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