What is an advantage of having an out-of-band management?

The correct answer is B. Network devices can still be managed, even in case of network outage. Out-of-band (OOB) management uses a dedicated, separate management network (e.g., a console server with modem or a separate management LAN) that is physically or logically isolated from the production network. The key advantage is resilience: if the production network goes down…

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Options

AIt is less expensive to have an out-of-band management.
BNetwork devices can still be managed, even in case of network outage.
CThere is no separation between the production network and the management network.
DSSH protocol must be used to manage network devices.

How the community answered

(39 responses)

A
3% (1)
B
87% (34)
C
8% (3)
D
3% (1)

Explanation

Out-of-band (OOB) management uses a dedicated, separate management network (e.g., a console server with modem or a separate management LAN) that is physically or logically isolated from the production network. The key advantage is resilience: if the production network goes down due to a misconfiguration, hardware failure, or attack, administrators can still reach and manage devices through the out-of-band path. Answer A is incorrect-OOB infrastructure adds cost. Answer C describes the opposite (in-band management has no separation). Answer D is false-OOB management can use any protocol (including console/serial), and SSH is not required.

Topics

#out-of-band management#network availability#management plane#network resilience

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