At present, there are four VoIP security issues: blocking type of service (DoS) of safety, illegal access to the phone fraud or hacking threat, whereas VoIP protocol security is unable to ignore the pain, information security experts will warn you, if the improper VoIP deployment, the Internet will be safety and the safety of malicious code, VoIP could undermine the network security measures, for the enterprise network, the threat of VoIP is particularly big, because companies will rush to deploy this technology and ignore the security,
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