SY0-501 · Question #305
A company is deploying a new VoIP phone system. They require 99.999% uptime for their phone service and are concerned about their existing data network interfering with the VoIP phone system. The…
The correct answer is A. Put the VoIP network into a different VLAN than the existing data network. To provide optimal performance and availability for a new VoIP system while minimizing interference with an existing, saturated data network, separating the VoIP traffic into a dedicated VLAN is the most effective solution.
Question
A company is deploying a new VoIP phone system. They require 99.999% uptime for their phone service and are concerned about their existing data network interfering with the VoIP phone system. The core switches in the existing data network are almost fully saturated. Which of the following options will pro-vide the best performance and availability for both the VoIP traffic, as well as the traffic on the existing data network?
Options
- APut the VoIP network into a different VLAN than the existing data network.
- BUpgrade the edge switches from 10/100/1000 to improve network speed
- CPhysically separate the VoIP phones from the data network
- DImplement flood guards on the data network
How the community answered
(50 responses)- A80% (40)
- B6% (3)
- C10% (5)
- D4% (2)
Why each option
To provide optimal performance and availability for a new VoIP system while minimizing interference with an existing, saturated data network, separating the VoIP traffic into a dedicated VLAN is the most effective solution.
Placing the VoIP network into a separate VLAN logically isolates its traffic from the existing data network, preventing broadcast storm interference and allowing specific Quality of Service (QoS) policies to be applied to VoIP packets. This logical segmentation ensures VoIP traffic has a dedicated broadcast domain, helping meet the 99.999% uptime requirement and reducing contention with the saturated data network.
Upgrading edge switches will not resolve the saturation issue identified at the core switches and does not logically separate VoIP traffic from the data network.
Physically separating the networks would be very expensive and complex, requiring duplicate infrastructure rather than leveraging existing equipment with logical segmentation.
Implementing flood guards is a security measure to prevent Layer 2 attacks and does not address network saturation or provide logical separation for improved VoIP performance and availability.
Concept tested: VLAN segmentation for traffic isolation and QoS
Source: https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-2960-series-switches/white_paper_c11-574971.html
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