Duplication

  • [ACSA Education #34] VRRP

    In the previous post, we looked into the Default Gateway. An endpoint can only have one Default Gateway. And it can become a single point of failure. Looking at the figure below, if Core-1 fails, all hosts using Core-1 as the Default Gateway, including PC-1, will be isolated. How should we deal with this situation? Redundancy…

  • [ACSA Education #24] Redundant Network

    Network communication is critical to IT infrastructure. It often has a significant impact on services. As shown below, if there is only one path connecting to the Core-1 switch, and the link between the two access switches and the Core-1 switch is severed, the network will be disconnected, and ultimately, Host A and Host B will be unable to communicate with each other. To solve this…