Exploring Internet Protocol Security

- [Instructor] Internet Protocol is a best effort, … connectionless protocol, which is used to connect networks … by routing and addressing each packet. … IP is not secure on its own. … To secure IP, we use Internet Protocol Security, or IPsec, … which is a framework for securing IP communications … and is designed to provide security for IP version 4 … or IP version 6. … IPsec can both encrypt and authenticate each IP packet … of a session between hosts or networks … across the LAN and the internet. … Here we see an illustration of the different layers … and corresponding security methods in the OSI model: … The application layer, transport layer … and the network layer. … IPsec provides security at the network layer … and can protect the higher layer protocols … in a much wider range of applications … than Transport Layer Security … and no special training is required when using IPsec. … We can add IPsec to IP version 4 … or IP version 6 by using additional headers. … IPsec is not a single protocol, it's a framework …