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(TCO 4) There are several well-known problems for the session initiation protocol (SIP)when crossing firewalls, most of them related to Network Address

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(TCO 4) There are several well-known problems for the session initiation protocol (SIP)when crossing firewalls, most of them related to Network Address Translation (NAT).  Which of the following is not considered to be a type of NAT that exhibits different behavior with SIP?

(TCO 4) Which Quality of Service (QoS) mechanism provided by the network does real time transport protocol (RTP) rely on to guarantee a certain QoS for the data streams it carries?

 (TCO 4) The session initiation protocol (SIP) maps to which layer of the Open Systems Interconnection (OSI) model?

(TCO 4) Inter-arrival jitter is defined as the average difference of the delay between two consecutive

(TCO 4) SIP authentication allows all of the following types of authentication except

(TCO 4) Which of the following is best suited to work with multimedia multiparty session invitation like a video broadcast?

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