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Difficulty: HardRemote Access and Out-of-Band Management

A network administrator is troubleshooting an isolated server at a remote site after its operating system suffers a complete kernel panic. Because the host OS is non-functional, all in-band management sessions are disconnected and unresponsive. The administrator must view pre-boot POST and BIOS screens and perform a hard power cycle on the system without physical access. Which of the following deployment strategies best achieves these out-of-band management objectives?

  1. Connecting an IP-KVM appliance to the server's video and USB ports while plugging the server's power supplies into a networked managed Power Distribution Unit (PDU)Answer
  2. B
    Opening an in-band Telnet session to port 23 on the connected switch port to issue software reboot commands directly to the server's network interface card
  3. C
    Sending SNMPv2c SET commands to the host server's management agent to trigger a remote operating system restart
  4. D
    Establishing a VNC remote desktop connection across an IPsec VPN tunnel directly to the primary host IP address

Answer

The optimal solution is to connect an IP-KVM appliance to the server's hardware console ports and plug its power supplies into a networked managed Power Distribution Unit (PDU).
Out-of-band (OOB) management operates independently of the host operating system. An IP-KVM switch captures hardware display output (BIOS/POST) and sends keyboard/mouse inputs directly via hardware ports. Paired with a networked managed PDU (Power Distribution Unit), an administrator can remotely toggle electrical power to force a hard cold reboot when the host OS is frozen.

Step-by-Step Solution

1
Analyze the management constraints and system failure state.
Identified that the host operating system has kernel-panicked, rendering all in-band software services (SSH, RDP, VNC, SNMP) non-functional.
Out-of-band (OOB) solutions must operate independent of the host OS and primary network stack.
2
Identify the required hardware interaction capabilities.
The scenario requires BIOS/POST screen output viewing and direct physical electrical power toggling.
Standard network CLI tools cannot display pre-boot video or force a hard hardware power cycle.
3
Select the appropriate out-of-band hardware technologies.
An IP-KVM provides remote keyboard, video, and mouse interaction at the hardware level, while a managed PDU provides remote outlet power control.
Combining IP-KVM with a managed PDU fulfills both hardware-level display inspection and hard power cycling requirements.

Key Concept

Out-of-Band (OOB) Management and Hardware Abstraction
Estimated Time:2m 0s
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Topics

Remote Access and Out-of-Band Management

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