Which two VLAN IDs indicate a default VLAN? (Choose two.)
VLAN 1 is a system default VLAN, you can use this VLAN but you cannot delete it.
By default VLAN 1 is use for every port on the switch.
Standard VLAN range from 1002-1005 it's Cisco default for FDDI and Token Ring.
You cannot delete VLANs 1002-1005
Mostly we don't use VLAN in this range.
In Cisco networking, a default VLAN is a VLAN that is created automatically on all switches and cannot be deleted. It is used for system-generated frames, such as spanning tree protocol (STP), Cisco Discovery Protocol (CDP), and VLAN Trunking Protocol (VTP) frames.
The two VLAN IDs that indicate a default VLAN are:
VLAN 1: This VLAN is created automatically on all Cisco switches and is the default VLAN for all ports. By default, all ports on a switch are assigned to VLAN 1 unless configured otherwise.
VLAN 1002 to VLAN 1005 and VLAN 4096: These VLAN IDs are reserved for system use and are not user-configurable. VLAN 1002 to VLAN 1005 are reserved for Token Ring and FDDI VLANs, while VLAN 4096 is reserved for private VLANs.
Therefore, the correct answers are B. 1 and C. 1005. VLAN IDs 0 and 1006 are not valid VLAN IDs and VLAN 4096 is not a default VLAN.