To support VoIP on the same physical ports used by computers:
B: Enable 802.1Q: This standard supports VLAN tagging, allowing voice and data traffic to share the same port using separate VLANs.
D: Set up voice VLANs: Separating voice traffic into its own VLAN improves QoS and manageability.
Other options are not directly related to configuring VoIP over existing ports:
A: Network translation definitions (NAT) are unrelated to switch-level VLAN configuration.
C: Routing protocols are not necessary at the switch level for VLAN setup.
E: DNS is not required for the switch or VLAN setup.
F: Perimeter network (DMZ) is used for public-facing servers, not VoIP VLANs.
# Reference:
CompTIA Network+ N10-009 Official Objectives: 2.3 - Given a scenario, configure and verify VLANs.
CompTIA Network+ N10-009 Official Objectives: 3.6 - Explain the characteristics of network topologies and types.