What is a SIP 'man-in-the-middle' attack and which technology most directly prevents it at the signaling layer?
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A
An attacker intercepts and relays SIP messages between parties; TLS with certificate validation prevents it
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B
An attacker floods the server with OPTIONS requests; rate limiting prevents it
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C
An attacker spoofs caller ID; SRTP prevents it
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D
An attacker hijacks RTP streams; Digest auth prevents it