IPsec is a protocol suite that secures IP traffic through encryption, integrity protection, and authenticated communication at the network layer. It matters because organizations often need to protect traffic between networks or systems without depending only on application-layer security.
What is IPsec?
IPsec is widely used in VPNs, site-to-site connectivity, and protected network communications. It can secure traffic transparently for applications by operating below them at the network layer.
What IPsec Commonly Supports
Common uses include VPNs, branch connectivity, protected tunnels, network-layer encryption, and hybrid environment links.
IPsec vs. Application-Layer Encryption Only
IPsec protects traffic at the network layer. Application-layer encryption focuses higher in the stack and may not cover all routed traffic equivalently.
Frequently Asked Questions
Why is IPsec important?
Because it can protect broad categories of traffic without requiring every individual application to implement its own secure transport model.
Is IPsec only for site-to-site use?
No. It is also used in remote access and other secure tunnel designs.
