Go back to CT0-101 - CompTIA Convergence+ Certification Exam

Question :-

A company plans to deploy softphones to their telecommuters, so the telecommuters can connect to their IP PBX through a VPN. There is concern about the number of User Datagram Protocol (UDP) ports that the VoIP standards open by default for audio. Which of the following should the company consider to limit their risk of wide open ports in the firewall? (Select TWO)
Encrypt the signaling and audio packets.
Deploy a new VPN concentrator.
Configure Access Control Lists.
Deploy a Session Border Controller (SBC).
Configure the IP-PBX to use a smaller range of UDP ports.

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