300-320 · Question #482
300-320 Question #482: Real Exam Question with Answer & Explanation
The correct answer is B: Cisco FabricPath provides MAC address scalability with conversational learning.. FabricPath uses conversational MAC learning - switches only learn MAC addresses for active flows rather than flooding and learning all MACs, which dramatically improves MAC table scalability in large data center fabrics. FabricPath also adds a TTL field to its frame header (simil
Question
Options
- ACisco FabricPath relies on OSPF to support Layer 2 forwarding between switches, which allows
- BCisco FabricPath provides MAC address scalability with conversational learning.
- CLoop mitigation is provided by the TTL field in the frame.
- DCisco FabricPath is IETF-standard and is not used with Cisco products.
- ECisco FabricPath technology is supported in all Cisco platforms and can replace legacy Ethernet
Explanation
FabricPath uses conversational MAC learning - switches only learn MAC addresses for active flows rather than flooding and learning all MACs, which dramatically improves MAC table scalability in large data center fabrics. FabricPath also adds a TTL field to its frame header (similar to IP routing's TTL), which provides loop mitigation by discarding frames that have exceeded the hop count, eliminating the need for Spanning Tree Protocol. Option A is false because FabricPath uses a variant of IS-IS (not OSPF) for topology discovery. Option D is false because FabricPath is Cisco proprietary (specific to Nexus platforms). Option E is false because it is not supported on all Cisco platforms.
Community Discussion
No community discussion yet for this question.