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Cisco Router 'Privileged' Mode
How to Configure SSH on Cisco Routers and Switches? - GeeksforGeeks
How to Set User and Password on Cisco Router - learncisco.net
Configure Cisco Router Step by Step Guide
Cisco 4000 Series ISRs Software Configuration Guide, Cisco IOS XE Gibraltar 16.12.x - Managing the Device Using Web User Interface [Cisco 4000 Series Integrated Services Routers] - Cisco
How do I configure a Cisco router for secure remote access using SSH? – O'Reilly
Configure Password for Devices in Cisco Packet Tracer : 8 Steps - Instructables