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Zorluk: OrtaRemote Access and Out-of-Band Management

A network administrator needs to establish a remote management connection to a core router located at an unstaffed branch office. The solution must grant low-level command-line interface (CLI) access for emergency troubleshooting even if the router's primary operating system network interfaces or main WAN links experience a complete failure. Which of the following solutions best satisfies these requirements?

  1. An out-of-band serial console server connected to the router's console port with a dedicated cellular modem linkCevap
  2. B
    In-band administrative Telnet sessions configured over port 22 on the primary WAN Ethernet interface
  3. C
    Remote Desktop Protocol (RDP) sessions established over connectionless UDP across the primary WAN link
  4. D
    In-band Simple Network Management Protocol version 2 (SNMPv2c) read-write polling over the local area network

Cevap

An out-of-band serial console server connected to the router's console port with a dedicated cellular modem link
Out-of-band (OOB) management provides an alternate, isolated communication path to network hardware. By connecting a serial console server directly to the router's physical console port and routing traffic over an independent channel such as a cellular modem, administrators retain full CLI access to troubleshoot device failures even when primary IP interfaces or WAN circuits are down.

Adım Adım Çözüm

1
Analyze the operational constraints and availability requirements
Management access must function even when primary WAN links fail and main OS interfaces are down.
In-band management paths depend on active primary network interfaces and operational IP routing, which fail during link or interface outages.
2
Differentiate between in-band and out-of-band (OOB) management architectures
Out-of-band management provides a separate physical or logical communication channel outside the primary data network path.
Connecting directly to a physical console port via a terminal/console server paired with an alternate WAN connection (like cellular) guarantees administrative access during primary outages.

Anahtar Kavram

Out-of-Band (OOB) Remote Management
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Konular

Remote Access and Out-of-Band Management

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