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SSH requires both an IP and MAC address for security reasons while Telnet only needs an IP to access the switch.
Rolled and rollover cables are the same
If the SYST (system) LED on a Cisco switch is ON but the color is AMBER (sometimes referred to as orange), it indicates that the switch has encountered a critical issue during the boot process, and the Cisco IOS (Internetwork Operating System) failed to load successfully. This status is commonly known as "POST Failed" (POST stands for Power-On Self-Test).
The command "Switch(config)#?" will display a list of available commands in the CONFIGURATION mode of a Cisco network switch. In Cisco devices, the "Switch(config)#" prompt indicates that you are in the CONFIGURATION mode, where you can make changes to the device's configuration.
Pressing the "Backspace" key moves the cursor backward in the command line and deletes the character immediately before the cursor. It effectively removes characters one by one from the end of the command string as you press the "Backspace" key repeatedly.
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Pressing the "Left arrow" key or "Ctrl-B" (Control+B) advances the cursor in the command line without deleting any characters. Both these keyboard shortcuts allow you to move the cursor to the left in the currently displayed command, one character at a time.
All of these are valid options
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The "Down arrow" key or "Ctrl-N" (Control+N) keystrokes allow you to navigate back to more recent commands in the command-line interface (CLI) history buffer. Each time you press the "Down arrow" key or "Ctrl-N," it displays the next command in reverse chronological order, showing you more recent commands you have entered.
Pressing "Ctrl-A" places the cursor at the beginning of the command string in a command-line interface (CLI) or terminal window. This keyboard shortcut is often referred to as the "caret notation," and it's used to quickly move the cursor to the start of the current command line.
