This is a first in a series of beginner courses on TCP/IP Data Networking. This course covers - IP Data Networking with Subnetting, DHCP, NAT and ARP basics. The idea is to give a high level overview of these protocols, so that the student can then go out and read more material easily. Suitable for undergrad 2nd and 3rd year students learning TCP/IP Networking. The videos also give some examples of how packets traverse the routers, especially, in the case of NAT function in the boundary routers.