Text Book (Theory):
1) Douglas E. Comer, “Internetworking with TCP/IP - (Vol. 1) Principles, Protocols, and Architecture”, 5th Edition, Prentice Hall of India (PHI) Publishers.
Reference Books (Theory):
1) Behrouz A. Forouzan, “TCP/IP Protocol Suite”, 4th Edition, McGraw-Hill
2) W. Richard Stevens, G. Gabrani, “TCP/IP- Illustrated, Vol. 1 (The Protocols)”, Pearson Publishers.