A network engineer is asked to configure VLANS 2, 3, and 4 for a new implementation. Some ports must be assigned to the new VLANS with unused ports remaining. Which action should be taken for the unused ports?
A black hole VLAN is a virtual LAN that is configured on a network switch, but it is not connected to any device or port. Traffic that is sent to a port in a black hole VLAN is discarded, effectively "sinking" into a "black hole." Black hole VLANs are sometimes used as a security measure to isolate or quarantine certain ports or devices, or to prevent unauthorized access or traffic on a network.
Option 'c' is correct.
Placing unused ports into a "black hole" effectively isolates them from the network.
No IP address is applied to the SVI, so they cannot access any infrastructural equipment.
Basic CCNA Security question, which *is* within scope of CCNA.
Some administrators take unused ports a step further by creating a black hole VLAN. This is a VLAN that's local to this switch only, has no layer 3 switch virtual interface (SVI) configured for it, and isn't allowed to traverse an uplink trunk port
C is correct!
A black hole is a vlan that is unused where you put unused ports in or hosts that you dont want to be on the network.
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