A technician is unable to connect to a network device via SSH. Which of the following cables should the technician use as an alternative connection method with a laptop?

The correct answer is A. Serial. Network devices (routers, switches, firewalls) have a dedicated console port that provides out-of-band management access independent of the network. This console port uses a serial connection (typically via a rollover/console cable from a DB9 or USB-to-serial adapter on the lapto

Hardware and network troubleshooting

Question

Options

ASerial
BHDMI
CParallel
DLightning

How the community answered

(41 responses)

A
85% (35)
B
2% (1)
C
5% (2)
D
7% (3)

Explanation

Network devices (routers, switches, firewalls) have a dedicated console port that provides out-of-band management access independent of the network. This console port uses a serial connection (typically via a rollover/console cable from a DB9 or USB-to-serial adapter on the laptop). This allows the technician to access the device's CLI even when network connectivity is unavailable. HDMI (B) is for video output. Parallel (C) is a legacy interface used for older printers. Lightning (D) is an Apple proprietary connector with no role in network device management.

Topics

#Network troubleshooting#Console connection#Serial cable#Cabling

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