210-060 · Question #4
Which three network elements are crucial when deploying VoIP devices? (Choose three.)
The correct answer is A. Round-trip time B. QoS markings C. Bandwidth. Successful VoIP deployments depend on round-trip time, QoS markings, and available bandwidth because these factors directly control voice quality, traffic prioritization, and call capacity.
Question
Which three network elements are crucial when deploying VoIP devices? (Choose three.)
Options
- ARound-trip time
- BQoS markings
- CBandwidth
- DEthernet
- EFibre
- FToken ring
How the community answered
(22 responses)- A95% (21)
- F5% (1)
Why each option
Successful VoIP deployments depend on round-trip time, QoS markings, and available bandwidth because these factors directly control voice quality, traffic prioritization, and call capacity.
Round-trip time (latency) must be kept below ~150 ms one-way to prevent noticeable speech degradation and talker overlap in real-time voice conversations.
QoS markings such as DSCP EF (Expedited Forwarding) ensure that voice packets are prioritized over other traffic types through network queuing mechanisms.
Sufficient bandwidth must be provisioned per call (typically 64-87 kbps for G.711) to prevent packet loss and jitter that degrade voice quality.
Ethernet is a physical and data-link layer medium that may carry VoIP but is not itself a network element crucial to VoIP quality planning.
Fibre is a physical transmission medium and does not directly determine VoIP quality independently of QoS and bandwidth configuration.
Token Ring is a legacy and largely obsolete LAN technology not relevant to modern VoIP network design.
Concept tested: VoIP network requirements - latency, QoS, and bandwidth
Source: https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book/VoIPQoS.html
Topics
Community Discussion
No community discussion yet for this question.