A VLANIF (VLAN Interface) is a Layer 3 virtual interface used for inter-VLAN routing on a switch.

Option A (Incorrect): Different VLANIF interfaces cannot use the same IP address because each VLANIF interface represents a different VLAN and requires a unique IP.

Option B (Correct): VLANIF interfaces operate at Layer 3, enabling routing between VLANs.

Option C (Correct): VLANIF interfaces do not need to learn MAC addresses because they are virtual interfaces that forward packets based on IP routing instead of MAC learning.

Option D (Incorrect): A VLANIF interface does have a MAC address, typically derived from the switch’s system MAC address.

Thus, the correct answers are B and C.