The Payload Type field identifies the media type of the payload and the format of the data,including the use of compression or encryption.
Correct Answer:
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Q7: Real-time applications are more concerned with timing
Q8: Proxies are not useful for enforcing policy.
Q9: SIP is based on an HTTP-like request/response
Q10: The requirements of real-time traffic differ from
Q11: _ is the determination of the willingness
Q13: An application-level firewall may prevent the forwarding
Q14: The _ connects different physical networks in
Q15: A VoIP system is usually cheaper to
Q16: _ is a desirable property for real-time
Q17: A user agent server issues SIP requests.
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