In This Tutorial We Are Going To Learn How To Configure Point To Point Protocol
In This I Am Going To Tell You The Easiest Way To Configure Point To Point Protocol Just Follow These Steps

Step 1- Firstly We Have To Take 2 Router And Connect with Serial Port

Step 2- First Set The Hostname To The Router And Then Assign The Ip’s To The Router And Don’t Forget To Set Clock Rate 64000 In Router 1 Se0/1/0

Step 3- Configuration Of Router 1

R1
#Enable
#Config Turminal
#Username R2 Password CCNA123
#int S0/0/0
#Encapsulation PPP
#PPP Authentication Chap
#Exit

Step 4 Configuration Of Router 2

R2
#Enable
#Config Turminal
#Username R1 Password CCNA123
#int S0/1/0
#Encapsulation PPP
#PPP Authentication Chap
#Exit

Here I AM Going To Tell You What Is PPP & CHAP

Here IS The Full Form

PPP   –   Password Authentication Protocol
Chap –   Chalange Hand shake Authentication