单选题When an ICMP redirect is received， which of the following options is the most appropriate to conclude？（）AA routing table has changedBThe IP address has changedCThe system has become a gatewayDA hacker is posing a threat to the system
单选题
When an ICMP redirect is received， which of the following options is the most appropriate to conclude？（）
A
A routing table has changed
B
The IP address has changed
C
The system has become a gateway
D
A hacker is posing a threat to the system
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