1.
TCP/IP
Analysis

2.
Study TCP/IP Layers

3.
TCP/IP Protocols

4.
Ports
 a port is an endpoint of communication in an operating system

5.
Sockets
 A network socket is an endpoint of a connection across a computer network

6.
Data transfer process

7.
TCP Header

8.
TCP Flags

9.
IP Header

10.
ICMP Header