Cisco
400-007 · Question #190
400-007 Question #190: Real Exam Question with Answer & Explanation
The correct answer is B: Use switch clustering at the distribution layer where possible. Switch clustering at the distribution layer and avoiding stretched VLANs both enhance Layer 2 redundancy while supporting flexibility and scalability in the network design.
Question
Company XYZ wants design recommendations for Layer 2 redundancy (using Layer 2 technologies). The company wants to prioritize flexibility and scalability elements in the new design. Which two technologies help meet these requirements? (Choose two.)
Options
- AConfigure DHCP snooping on the switches
- BUse switch clustering at the distribution layer where possible
- CUse Unidirectional Link Detection
- DAvoid stretching VLANs across switches
- EUse root guard
Explanation
Switch clustering at the distribution layer and avoiding stretched VLANs both enhance Layer 2 redundancy while supporting flexibility and scalability in the network design.
Common mistakes.
- A. DHCP snooping is a Layer 2 security feature that prevents rogue DHCP servers, but it does not contribute to redundancy, flexibility, or scalability in the network design.
- C. Unidirectional Link Detection detects and disables unidirectional links to prevent STP loops, but it is a protective mechanism rather than a technology that adds flexibility or scalability.
- E. Root guard prevents external switches from becoming the STP root bridge, which is a stability protection feature rather than a mechanism for improving flexibility or scalability.
Concept tested. Layer 2 redundancy scalability with switch clustering and VLAN design
Reference. https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Campus/HA_campus_DG/hacampusdg.html
Community Discussion
No community discussion yet for this question.