Which practice helps avoid operational disruptions when deploying newer protocol versions?

• A. Eliminate backward compatibility requirements
• B. Disable monitoring during upgrade
• C. Backward compatibility testing and transitional strategies
• D. Prohibit upgrading until all peers update

Answer: (C)

Smooth upgrades are safest when you plan for compatibility and a gradual transition. This means performing backward compatibility testing so the new version can still talk to older peers, and implementing transitional strategies that let both old and new versions operate together during rollout. Practical approaches include version negotiation, dual-support (keeping both versions functional during a period), feature flags to enable new behavior gradually, phased deployments to a subset of peers, and a clear rollback plan if issues surface. This mindset reduces the risk of outages, makes problems observable rather than hidden, and provides a controlled path to full adoption. In contrast, removing backward compatibility, turning off monitoring during the upgrade, or waiting for every peer to update before starting create bottlenecks, hide issues, and stall progress, which increases the chance of disruptive failures.