JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2024) — Question 42

Which protocol prevents loops and calculates the best path through a switched network that contains redundant paths?

Answer options

• A. VRRP
• B. STP
• C. DHCP
• D. IS-IS

Correct answer: B

Explanation

The correct answer is STP (Spanning Tree Protocol), which is specifically designed to prevent loops in network topologies with redundant paths. VRRP is a redundancy protocol for IP addresses, DHCP is used for dynamic IP address assignment, and IS-IS is a routing protocol for larger networks, none of which focus on loop prevention in switched environments.