Quality of Service (QoS) is crucial for real-time services like video conferencing. It prioritizes voice and video packets over less critical traffic (like file downloads), reducing latency, jitter, and packet loss.
B: Network signal may apply to wireless, but it's not specific to video issues.
C: Time to live (TTL) affects packet lifespan, not performance or quality.
Doad balancing manages traffic across multiple paths but doesn't prioritize real-time traffic like QoS does.
# Reference:
CompTIA Network+ N10-009 Official Objectives: 3.6 - Explain the characteristics of network topologies and types.