Computer Networks: VLAN, VPN, IP Tunneling, WAN and VoIP

This covers the VLAN, VPN, IP Tunneling and WAN and Internet.
It also briefs about VoIP Voice over IP.

Slides in PDF format:
https://drive.google.com/drive/u/0/folders/1z3ylV_3EuIJKYHGy7Fmg1RK-OGK24j98

source

ip address