Question

Q:By default, how many VLAN exist in switch? Create a
new VLAN
with name IT and assign 10 ports for it, Verify.

Answer 1

Explanation:

one VLAN

The Native VLAN is the one VLAN on a trunk port which is allowed to remain untagged. By default, this is set to VLAN 1, but this can be changed by an administrator.

Answer 2

Answer:

On most switches, this default is VLAN 1 and should be changed for security reasons. Some network managers may use the term “default VLAN” to refer to a VLAN to which all ports are assigned when they're not being used.

Under IEEE 802.1Q, the maximum number of VLANs on a given Ethernet network is 4,094 (4,096 values provided by the 12-bit VID field minus reserved values at each end of the range, 0 and 4,095).