In IPv6 network, the router is only responsible for routing, all jobs are finished by the end of divided, IPv6 baotou to simplify structure, at the same time to separate router access to relevant information, make faster speed when the router on the analysis of the data packets, thus, IPv6 network of VoIP voice packet transmission faster, better real-time performance, and the longer the distance of this, the more obvious advantages, coupled with the increase of the bandwidth and each node has the QoS guarantee, makes the IPv6 network of VoIP voice quality better! In IPv6 protocol stack, security components (IPSec) is necessary, can be used by the user to decide whether to need, so that the upper protocol does not require any modification or additional content, voice packets even halfway intercepted cannot back into speech, therefore, IPv6 make VoIP communications safer,
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