Configuring Voice Packet Delay Policy

D.

The policy that ensures that a voice packet is always sent on the link with less than a 50 msec delay is a QoS (Quality of Service) policy, which is configured using centralized control.

Cisco SD-WAN (Software-Defined Wide Area Networking) is a technology that enables the deployment and management of wide-area networks using software-based controllers and cloud-based management tools. SD-WAN solutions provide better performance, security, and reliability than traditional WAN technologies by leveraging multiple transport links, including broadband internet, LTE, and MPLS.

QoS policies in SD-WAN are used to prioritize traffic based on business requirements and to ensure that critical applications such as voice and video are given priority over less important traffic. In this case, the QoS policy is used to ensure that voice packets are always sent on the link with less than a 50 msec delay, which is necessary to maintain voice quality.

The QoS policy is configured using centralized control, which means that the policy is defined and enforced by the SD-WAN controller. This ensures that the policy is consistently applied across all SD-WAN devices in the network. The centralized control also enables the controller to dynamically adjust the QoS policy based on real-time network conditions, such as link congestion and packet loss.

Localized control and localized data are not relevant to this question. Localized control refers to the ability of an SD-WAN device to make traffic forwarding decisions locally, without relying on a centralized controller. Localized data refers to the storage of data on local devices rather than in a centralized data center.

In summary, the correct answer is B) centralized control, as the QoS policy that ensures that a voice packet is always sent on the link with less than a 50 msec delay is configured using centralized control.