400-007 · Question #258
As a network designer you need to support an enterprise with hundreds of remote sites connected over a single WAN network that carries different types of traffic, including VoIP, video, and data appli
The correct answer is A. Focus on the solution instead of the problem, which helps to reduce downtime duration. Valid WAN design considerations include understanding traffic types, measurement location, and flow direction. Focusing on a solution before understanding the problem is a design anti-pattern and does not constitute a design input.
Question
As a network designer you need to support an enterprise with hundreds of remote sites connected over a single WAN network that carries different types of traffic, including VoIP, video, and data applications, which of following design considerations will not impact design decision?
Options
- AFocus on the solution instead of the problem, which helps to reduce downtime duration
- BIdentify traffic types and top talkers over this link
- CThe location of the data collection
- DWhat direction the data or flows should be metered
How the community answered
(39 responses)- A77% (30)
- B13% (5)
- C3% (1)
- D8% (3)
Why each option
Valid WAN design considerations include understanding traffic types, measurement location, and flow direction. Focusing on a solution before understanding the problem is a design anti-pattern and does not constitute a design input.
Sound network design methodology requires first defining and understanding the problem before proposing solutions - jumping to a solution without problem analysis is an anti-pattern. This approach does not represent a design consideration at all; it describes flawed process that has no bearing on actual WAN design decisions for a multi-site enterprise.
Identifying traffic types and top talkers is essential for sizing WAN bandwidth and configuring QoS policies for VoIP, video, and data traffic.
The location of data collection determines where NetFlow exporters or monitoring probes are deployed, directly affecting traffic visibility architecture.
Understanding the direction of traffic flows is necessary for applying correct QoS markings and metering policies on asymmetric WAN links.
Concept tested: WAN design methodology - problem-first analysis
Source: https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/CVD/WAN_Design_Guide.html
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