A company has invested in an on-premises VoIP solution. For design simplicity purposes, network engineers have opted to use a single VLAN for both data and voice traffic. Shortly after implementing IP phones, customers are reporting problems. Which two potential problems may be reported about the calls as a result of this design decision? (Choose two.)

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A. jitter detected in voice calls Without a dedicated voice VLAN enforcing QoS markings (DSCP EF), data traffic bursts compete with voice packets and cause variable packet arrival times (jitter), which VoIP codecs cannot tolerate beyond approximately 30 ms. D. choppy voice calls Choppy voice is a direct perceptual symptom of packet loss and high jitter; when voice and data share a single VLAN without prioritization, data frame bursts discard or delay voice packets, producing audible gaps and distortion.

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B. problems with email latency Email uses TCP with built-in retransmission and flow control and is not adversely affected by the absence of a dedicated voice VLAN; email latency is unrelated to this VoIP design decision.

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C. slow internet download speeds Internet download speed depends on WAN bandwidth and ISP policies, not on whether voice and data share a LAN VLAN, so this problem would not result from the described design.

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E. PCs are getting IP addresses but phones are not Both phones and PCs can receive IP addresses from the same DHCP pool on a single VLAN; IP address assignment failure would indicate a DHCP misconfiguration, not a voice-data VLAN consolidation problem.

A company has invested in an on-premises VoIP solution. For design simplicity purposes, network engineers have opted to use a single VLAN for both data and voice traffic. Shortly after implementing…

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