t widely used UDP &ldquo;application&rdquo;. AppSwitch supports UDP at the API level much the same way as TCP and when it detects a UDP connection, it can transparently handle it in its &ldquo;fast-path&rdquo; rather than delegating it to the proxy.</p><h3 id=client-ip-preservation-and-end-to-end-principle>Client IP preservation and end-to-end principle</h3><p>The same mechanism that preserves the source network environment can also preserve client IP addresses as seen by the servers. With a sidecar proxy i