Designing Cisco Network Service Architectures (ARCH, legacy) — Question 4

Which technology can block interfaces and provide a loop-free topology?

Answer options

• A. STP
• B. VSS
• C. VLAN
• D. vPC

Correct answer: A

Explanation

The correct answer is A, STP (Spanning Tree Protocol), which is specifically designed to prevent loops in network topologies by blocking certain interfaces. Options B (VSS), C (VLAN), and D (vPC) do not inherently serve the purpose of blocking interfaces to create a loop-free environment.