300-820 Question #225: Real Exam Question with Answer & Explanation

Question

A company is setting up on-premises video collaboration systems with on-premises call control using Cisco Expressways. It is important to control the quality of service for a call on the network. The company has many different types of networks, from satellite to leased lines, and bandwidth is shared between many applications. This is a consolidated network. Which configuration can be applied to achieve reliable traffic on these networks?

Options

• AUsing regions and codec priority lists will ensure call control and quality on the internal network.
• BApplying QoS on the endpoints, switches, routers, and Expressway will ensure quality on the
• CApplying QoS on the endpoints, on the switches, routers, and Expressways and configuring
• DUsing pipes and links will ensure good-quality video calls in the internal network.

Explanation

To ensure reliable quality for video traffic across a consolidated network with varied bandwidth conditions, it is essential to apply QoS across the entire path (endpoints, switches, routers, Expressways) and configure subzones, pipes, and links on Cisco Expressway. Pipes and links define bandwidth limits and policies, while QoS markings ensure traffic prioritization across network devices. This comprehensive approach provides consistent quality for media streams.

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