In the following four items, the legal IP address is (). A.190.220.5 b.206.53.3.78 c.206.53.312.78 d.123, 43, 82220 Please analyze in detail why it is illegal and how to distinguish legitimacy,

In the following four items, the legal IP address is (). A.190.220.5 b.206.53.3.78 c.206.53.312.78 d.123, 43, 82220 Please analyze in detail why it is illegal and how to distinguish legitimacy,

Legal IP address: every host on the Internet has a unique IP address. IP protocol is to use this address to transfer information between hosts, which is the basis of Internet operation. The length of IP address is 32 bits, which is divided into 4 segments, 8 bits in each segment, represented by decimal digits, and the number range of each segment is 0 to