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How does a spam relay hide a spammer’s identify?

admin2014-10-10  23
问题 How does a spam relay hide a spammer’s identify?
选项 A、The person receiving the spam sees the ISP domain—the return  address—of the relaying server instead of the actual origin  server.
B、The person receiving the spam does not see any return address on the spam message.
C、The relaying server creates a non-existent return address.
D、The relaying server points to a fourth, unrelated server as  the return address.
答案A
解析
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