220-1201 A company deploys a new VoIP system Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  Increase the bandwidth of the internet connection

  Why it's wrong here

  Increasing the bandwidth of the internet connection primarily addresses external network bottlenecks, but it does not resolve internal network congestion where VoIP traffic competes with other data. Without Quality of Service (QoS) mechanisms, voice packets will still experience latency, jitter, and potential drops within the local area network, regardless of the available internet speed, leading to poor call quality.

• ✓

  Replace all switches with managed switches and enable QoS

  Why this is correct

  Managed switches are essential for implementing Quality of Service (QoS) policies, which allow network administrators to prioritize specific types of traffic. By enabling QoS, the network can be configured to give preferential treatment to VoIP packets, ensuring they are processed with minimal delay and packet loss. This prioritization directly mitigates latency and jitter, critical factors for maintaining clear and reliable voice communications.

• ✗

  Change all VoIP phones to use static IP addresses

  Why it's wrong here

  Assigning static IP addresses to VoIP phones provides consistent network identification and simplifies troubleshooting by eliminating dynamic address changes. However, static IPs do not inherently improve voice call quality because they do not address the underlying network performance issues that cause poor VoIP experiences. Factors like network congestion, insufficient bandwidth, latency, or jitter are not mitigated by fixed IP assignments.

• ✗

  Disable DHCP on the network to reduce broadcast traffic

  Why it's wrong here

  Disabling DHCP on the network would prevent all client devices from automatically obtaining necessary IP configuration, leading to widespread network connectivity failures rather than solving a voice quality issue. While DHCP does generate some broadcast traffic, this amount is typically negligible compared to the data traffic causing VoIP problems. Eliminating DHCP would introduce significant operational disruptions without addressing the core causes of poor voice quality, such as latency or packet loss.

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