CCNA Bit, Decimal and Maths

BIT		DECIMAL	Means
1	=	128		10000000
2	=	192		11000000
3	=	224		11100000
4	=	240		11110000
5	=	248		11111000
6	=	252		11111100
7	=	254		11111110
8	=	255		11111111

MATHS

/ 28 

--------------------

255		255		255		240
8	+	8	+	8	+	4

/20

-----------------

255  255  240     0

8    + 8  + 4    +0

/12

-----------------

255    240    0    0

8      +4   +0   +0

VSphere Client Cannot connect to the Client CD/DVD drive while trying to install a client server

Symptoms

• Connecting to the Client CD/DVD drive using Passthrough IDE mode fails to work in vSphere Client.
• This issue may occur with the vSphere Client on 32 bit or 64 bit versions of the Windows Operating Systems.
• After connecting to a local ISO, the Media connect dropdown menu for a Virtual machine stops responding at:
  
  CD/DVD Drive 1 (Connecting...)screen.

Cause

This issue can occur if you do not have local Administrator access to the operating system running the vSphere Client.

Resolution

To resolve this issue, ensure you have local administrator access:

 

To ensure you have local administrator access: 

1. Close the vSphere Client.
2. Right-click the vSphere Client icon and Click Run as Administrator.
3. Right-click the virtual machine and click Edit Settings.
4. Click CD/DVD and change the device to Passthrough IDE.
5. Power on the virtual machine and connect to the local CD/DVD drive.
6. Select the virtual machine from the vSphere Client menu and Click Inventory > Virtual Machine > Guest > Send Ctrl+Alt+Del.