When cabling a rack, which of the following is BEST practice?

Using rack-specific cabling hardware such as cable management arms, trays, and vertical/horizontal organizers allows for neat, secure, and supported cable routing. This improves airflow, simplifies maintenance and troubleshooting, and reduces the risk of accidental disconnections or damage.

Letting cables hang loosely behind servers is poor practice as it obstructs airflow, makes troubleshooting difficult, and increases the risk of cable damage or accidental disconnection.

While separating power and network cables is good for interference prevention, rigidly channeling all power down sides and network down the center is not universally the BEST practice and may not be optimal for all rack configurations, nor does it explicitly mention using specific hardware.

Keeping cables close to the front of the rack restricts access to equipment, hinders proper airflow, and complicates maintenance or upgrades from the front of the rack.