This book is continuation of my earlier book Computer Networking Fundamentals –Volume-I. In first book , we go through What is Computer Networking ?.Why network computers ? How provides Resource sharing, High reliability, Saving money, Scalability & Communication medium etc. So these are the general information we got in First book Computer Networking Fundamentals –Volume-I. Further in this book we look for What is OSI Model, What is TCP/IP Model. What are the differences & similarities in between OSI & TCP/IP Model. What is IP Addressing, What is subnetting& What are Static IP & Dynamic IPs.