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1. (TCO D) The ENUM suite of protocols _____. (Points : 5) represents phone numbers as Internet addresses brings together the E.164 and the DNS protocol uses the Naming Authority Pointer All of the aboveQuestion 2. 2. (TCO D) The advantage of DID is that _____. (Points : 5) Dual Inverse Direction allows for two-way communication shared external lines are multiplex among the internal lines on an on-demand basis every internal phone line has a corresponding external line All of the aboveQuestion 3. 3. (TCO F) The categories of security risks found in voice communications are _____. (Points : 5) generic VoIP related SIP related All of the aboveQuestion 4. 4. (TCO F) The secure, real-time protocol (SRTP) is associated with _____. (Points : 5) signaling message encryption message integrity authentication data encryptionQuestion 5. 5. (TCO D) Why does FAX not work well in practice in a VoIP network? (Points : 15) Question 6. 6. (TCO F) Why is the PSTN considered to be less of a security risk than a VoIP network? (Points : 15)