- Voice and video over IP (VoIP/videoconferencing) can work well but requires proper deployment including VLANs, QoS, redundant connections, and bandwidth management. - Factors like bandwidth, latency, jitter must be considered and can be addressed through QoS tagging and queue management. - Implementing quality videoconferencing over WAN connections presents challenges of limited bandwidth that can be mitigated using QoS and careful bandwidth allocation.