What is out-of-band (OOB) network?

• A. Primary data traffic channel.
• B. Management network path separate from production data network for remote control.
• C. A storage medium.
• D. An airflow direction.

Answer: (B)

Out-of-band network is a dedicated management path separate from the production data network. It’s used for remote control and administration of devices like servers and switches, so administrators can access consoles, perform maintenance, and diagnose issues even if the main data network is down or congested. This separation improves reliability and security because management traffic is isolated and reachable through dedicated ports or a separate network fabric (often via a dedicated management NIC, IPMI/iDRAC, or a separate switch/VLAN). The other options describe primary data traffic, a storage medium, or an airflow direction, none of which capture the purpose of a management network used for remote control.