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Santos:CCNA Sec 210-260 OCG by Omar Santos, John Stuppi

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IPsec and SSL

IPsec is a suite of protocols used to protect IP packets and has been around for decades. It is in use today for both remote-access VPNs and site-to-site VPNs. SSL is the new kid on the block in its application with remote-access VPNs. Let’s take a closer look at both of these options.

IPsec

IPsec is a collection of protocols and algorithms used to protect IP packets at Layer 3 (hence the name of IP Security [IPsec]). IPsec provides the core benefits of confidentiality through encryption, data integrity through hashing and HMAC, and authentication using digital signatures or using a pre-shared key (PSK) that is just for the authentication, similar to a password. IPsec also provides antireplay support. We take a closer look at IPsec ...

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