CCIE R&S V5.1 Written Exam: Describe 802.1x
I will be discussing Describe 802.1x as part of Layer 3 Technologies and Fundamental Routing Concepts CCIE Routing and Switching (R&S) V5.1 exam blueprint topics.
Describe 802.1x :
5.2 Network security
5.2.d Describe 802.1x
5.2.d [i] 802.1x, EAP, RADIUS
5.2.d [ii] MAC authentication bypass
Let me summarize some of the key takeaways related to CCIE R&S V5.1 Written Exam: Implement and Troubleshoot Static Routing as relevant to CCIE Routing and Switching (R&S) V5.1 written exam blueprint topics.
- MAB uses the MAC address of a device to determine what kind of network access to provide. MAB enables port-based access control using the MAC address of the endpoint. A MAB-enabled port can be dynamically enabled or disabled based on the MAC address of the device that connects to it
- By default, a MAB-enabled port allows only a single endpoint per port. Any additional MAC addresses seen on the port will cause a security violation
- EAPOL, STP and CDP traffic are not subjected to 802.1X access controls i.e. before traffic for these protocols will still pass even before an authentication takes place
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