A network engineering team is designing a resilient out-of-band (OOB) infrastructure for a remote edge data center. The goal is to ensure that administrators can perform direct console configuration and hard power cycles on core infrastructure even during a total failure of the site's primary WAN router and internal LAN routing. Which TWO of the following solutions must be deployed to fulfill these specific out-of-band recovery requirements?
- A terminal server connected to device console ports and paired with an external cellular modemCevap
- Switched Power Distribution Units (PDUs) reachable via an independent out-of-band management network linkCevap
- CIn-band Secure Shell (SSH) sessions configured on the primary switch VLAN interfaces
- DSNMPv2c write communities enabled over the production network to execute remote reboot commands
Cevap
The correct requirements to deploy are a terminal server paired with a cellular modem for serial CLI connectivity, and switched PDUs connected via an isolated out-of-band network link for power management.
Out-of-band management provides alternative administrative pathways when production networks fail. Deploying a terminal server connected to device serial console ports via an alternative gateway (such as a cellular modem) ensures direct access to device command lines even if primary IP routing is down. Additionally, implementing switched Power Distribution Units (PDUs) on an out-of-band segment allows engineers to perform hard power resets on frozen equipment remotely.
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Out-of-band (OOB) architecture requires physically separate access paths (cellular modems, terminal servers, serial console cables) and independent power management (switched PDUs) that operate entirely detached from in-band IP production networks.