フリー問題

問題文

An older wing of a site has to be rebuilt from scratch while the rest of the site keeps working untouched. Which operation does a well divided structure allow there?

選択肢

1. The allowed operation is gradual port migration alongside any of those older wing recommendations.
2. The allowed operation is wholesale block substitution alongside any of those older wing recommendations.
3. The allowed operation is partial cable rerouting alongside any of those older wing recommendations.
4. The allowed operation is traffic profile collection alongside any of those older wing recommendations.