Unit 1: Network Infrastructure
This will allow you to demonstrate your networking skills, knowledge, and abilities, with a focus on enterprise-level switching, routing, and multicast components that support cross-platform (inter)operability and integration with the most recent software-defined technologies.
Just after the switch has finished booting up for the first time, all of the switch ports are automatically added to the default VLAN. All of these ports are connected to the default VLAN, which means that they are all a part of the same broadcast domain. Due to this, any device that is attached to any port on the switch is able to communicate with other devices that are connected to other switch ports. The VLAN1 configuration is the default configuration for Cisco and a few other suppliers.
A native VLAN is a specialized VLAN that can travel on the 802.1Q trunk without the use of any VLAN tags. A native VLAN is described in the 802.1Q standard, which permits untagged traffic in contrast to the inter-switch connection, which does not support untagged traffic. The trunk port standard also supports traffic that originates from several VLANs in addition to traffic that does not originate from a VLAN. The configuration of the native VLAN is different for each trunk and switch. Untagged traffic is assigned to a native VLAN through the use of the 802.1Q trunk port. On the other hand, the native VLAN is responsible for detecting and identifying traffic that originates from each end of a trunk link. The native VLAN is originally set to VLAN 1, although it can be modified to any number, including VLAN 100, VLAN 200, VLAN 300, and so on. We also find that the native VLAN is helpful when we are working with VoIP.
Distinction Between Native VLAN and Default VLAN 
