add real examples about segmentations (#6897)

* Update src/data/roadmaps/cyber-security/content/perimiter-vs-dmz-vs-segmentation@PUgPgpKio4Npzs86qEXa7.md

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Co-authored-by: dsh <daniel.s.holdsworth@gmail.com>

src/data/roadmaps/cyber-security/content/perimiter-vs-dmz-vs-segmentation@PUgPgpKio4Npzs86qEXa7.md

@@ -22,3 +22,8 @@ To implement a DMZ in your network, you can use devices such as firewalls, route
 - Perimeter segmentation involves isolating an organization's internal networks from the untrusted external network, typically using security appliances such as firewalls, IDS, and IPS.
 - DMZ segmentation involves creating a separate, secure area within the network for hosting public-facing services that need to be accessible to external users while maintaining additional security for internal assets.
 - Implementing proper network segmentation and security policies can significantly reduce the risk of data breaches and other security threats.
+
+Learn more from the following resources:
+
+- [@opensource@Best practice for network segmentation](https://github.com/sergiomarotco/Network-segmentation-cheat-sheet)
+- [@opensource@OWASP Network segmentation Cheat Sheet](https://github.com/OWASP/CheatSheetSeries/blob/master/cheatsheets/Network_Segmentation_Cheat_Sheet.md#network-segmentation-cheat-sheet)