Upgrade Windows 11 Home to Windows 11 Pro

• Disable internet connection (Wi-Fi, Internet, etc.)
• Change the product key using the following Generic product key:

                VK7JG-NPHTM-C97JM-9MPGT-3V66T

• When the upgrade is completed, connect to the Internet
• Use a purchased product key to Activate the Windows

Find Windows product key using PowerShell

(Get-WmiObject -query "select * from SoftwareLicensingService").OA3xOriginalProductKey

Show SSID Password in WIndows

netsh wlan show profile

netsh wlan show profile name="SSID" key=clear

netsh wlan show profile name="SSID" key=clear | findstr Key

Finding the Manufacturing Date on Cisco Switches

switch# show version

The serial number is in this format: LLLYYWWSSSS

LLL = location of the supplier
YY = year of manufacture
WW = week of manufacture
SSSS = serial-id

Year codes:
01 = 1997
02 = 1998
03 = 1999
04 = 2000
05 = 2001
06 = 2002
07 = 2003
08 = 2004
09 = 2005
10 = 2006
11 = 2007
12 = 2008

Cannot connect to one of many SSIDs on a AP

AP has multiple SSIDs but randomly cannot connect to one SSID. The device is trying to negotiate and authenticate but cannot receive an IP address from the AP.  This can cause due to DHCP pool of available IP addresses being exhausted and there are many conflicts. To resolve the issue:

• connect to the main switch at the site
• show run | section dhcp
• clear all conflicts: clear ip dhcp conflict *
• ip dhcp pool guest_wireless
• lease for 8 hours: lease 0 8
• end
• wr
• show interface counters errors 
  
  
  

Testing the Internet Speed via CLI

• Speed test: npm install -g speed-test
• to run: speed-test
• Fast.com: npm install -g fast-cli
• to run: fast -u
  
  
  

HCI - Calculating the Available Storage

 For calculating the available storage given a certain number of disks, nodes, and RF:

((disk-size * #disks * #nodes)/RF) * 0.92

OR 

((#disks * #nodes * disk size)*0.93(Metadata)*0.7(Storage Operating Threshold))/(RF(replication Factor)*0.63(Storage Optimization Gain))