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Difficulty: MediumRemote Access and Out-of-Band Management

A network administrator is designing an out-of-band (OOB) remote management infrastructure to maintain emergency administrative access to core network devices during a primary WAN transport failure. Which of the following implementation steps are required to establish a secure, dedicated out-of-band management solution? (Select TWO.)

  1. Connecting device serial console ports to a dedicated terminal serverAnswer
  2. Connecting an auxiliary cellular modem to provide network connectivity isolated from the primary ISP linkAnswer
  3. C
    Enabling Telnet management on the external WAN gateway interface for quick remote command-line access
  4. D
    Configuring unencrypted SNMPv2c traps across the primary production network to transmit real-time outage alerts

Answer

To establish secure out-of-band management during primary network circuit failures, administrators must connect device serial console ports to a terminal server and attach an auxiliary cellular modem to provide independent external access.
Out-of-band management requires access pathways completely independent of the production IP network. Directing device serial console ports into a terminal server guarantees physical console access, while equipping the system with an auxiliary cellular modem provides an alternative wireless telecommunications path into the network when primary wired circuits fail.

Step-by-Step Solution

1
Analyze out-of-band (OOB) management isolation requirements
True OOB access must operate over a dedicated physical path isolated from primary production networks and ISP connections.
Primary transport failures render standard in-band management interfaces unreachable.
2
Evaluate hardware interface connections for device console access
Connecting serial console ports to a terminal server provides direct hardware-level CLI access.
Console ports remain accessible even when operating systems experience network stack failures or interface shutdowns.
3
Select an independent alternate communication link
Attaching an auxiliary cellular modem to the terminal server enables remote dialing or secure connection across cellular infrastructure.
Cellular connections provide an alternate transport mechanism unimpacted by wired local loop fiber cuts or ISP disruptions.

Key Concept

Out-of-Band (OOB) Management Architecture
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Topics

Remote Access and Out-of-Band Management

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