Nowadays many organisations depend on the network technology as an object to make a communication with each other. With having any fault in the devices cause to loss the packages that may be very important. In this book, the problem of unavailability network has been solved with using HSRP and VRRP protocols. It also shows the detail of technical using of HSRP and VRRP in five different scenarios. "Designing a nonstop network plays a significant role in improving business and communication, because nowadays, network availability is a significant requirement by users and companies, as many small and medium businesses depend on the computer network such as sending and receiving many messages around the globe"