Configuring a WAN connection to a VoIP provider that uses a public IP and must be protected by an ACL permitting only VoIP traffic to and from the provider demonstrates which consideration?

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Multiple Choice

Configuring a WAN connection to a VoIP provider that uses a public IP and must be protected by an ACL permitting only VoIP traffic to and from the provider demonstrates which consideration?

Controlling access to the WAN link with an ACL is a security measure. By permitting only VoIP traffic to and from the provider, you limit what can traverse the connection, reducing exposure to unwanted or malicious traffic and helping protect the signaling and media streams from compromise or interference. This tightens the attack surface at the edge where the VoIP service sits on a public IP. While QoS deals with prioritizing VoIP traffic to maintain call quality, it’s not about who can access the link. Availability concerns uptime and redundancy, not access control. Interface color coding isn’t related to security at all.

Controlling access to the WAN link with an ACL is a security measure. By permitting only VoIP traffic to and from the provider, you limit what can traverse the connection, reducing exposure to unwanted or malicious traffic and helping protect the signaling and media streams from compromise or interference. This tightens the attack surface at the edge where the VoIP service sits on a public IP.

While QoS deals with prioritizing VoIP traffic to maintain call quality, it’s not about who can access the link. Availability concerns uptime and redundancy, not access control. Interface color coding isn’t related to security at all.

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