The difference between services from the Control Panel and from the Windows Features

 There is a significant difference between the two. This is probably new in Windows 11.

I had to wade through a search, to home in on this difference because I could not enable Internet Information Services Manager by the legacy way of going through Windows Control Panel.

Control Panel --> Programs and Features-> Turn Windows Features on and Off

The above sequence displays the features in which the IIS is missing.

 

However, enabling Internet related items does install IIS. The IIS Manager can even be found in C:\Windows\system32\inetserv. It appears the IIS Manager is not fully functional according to Gemini.

It appears the correct way to enable IIS Manager is via Windows Features which brings up the same Turn windows Features on and off but now you can see the IIS.

Enabling IIS Manager through windows Features is the correct way and from the Services you can now turn on/turn off some of the services like IIS, .NET Framework, or Hyper-V. The windows services for most of other more operations like BitLocker Encryption, Storage management, file system operation, etc.

As Windows evolve things get changed continuously.

See also, here: https://stackoverflow.com/questions/30901434/iis-manager-in-windows-10

Is there telnet client/server in Windows 10?

Presently Telnet Server is not implemented on Windows 10. Telnet Client is installed but not enabled. Most probably it is deprecated as was done for the latest server.
---------
Telnet server deprecated use remote desktop
---------------
TELecommunication NETwork protocol is an unsecured (username/password is in text, not encrypted) network protocol and its use will be prejudicial to security on local networks as well as Internet.
It was still available in Windows 7. Follow these threads (1, 2) for Installing
Telnet Client and Telent Server on Windows 7.

Telnet client is installed but not enabled on Windows 10 and you need to
enable it. You can go this directory to access telnet.exe on Windows 10.
C:\Windows\System32\telnet.exe. Presently it is used to connect to remote servers
at.

Enabling the client on Windows 10:

Here are screen shot(s) to enable Telnet Client on Windows 10 and test it.

This is how your Windows Features accessible from Control Panel |
Programs | Programs and Features | Turn Windows Features On or Off
appears when telnet client is enabled. When not its not enabled there is no check mark:

telnet1.png

Place check-mark for Telnet Client (if not checked) and click OK.

You can now test the client as shown using command line:
C:\WINDOWS\system32>telnet
You get the following response:
Welcome to Microsoft Telnet Client
Escape Character is 'CTRL+]'
Microsoft Telnet>

You get the help now using the following command:
Microsoft Telnet>help /?
The response will be:
Commands may be abbreviated. Supported commands are:
c    - close                    close current connection
d    - display                  display operating parameters
o    - open hostname [port]     connect to hostname (default port 23).
q    - quit                     exit telnet
set  - set                      set options (type 'set ?' for a list)
sen  - send                     send strings to server
st   - status                   print status information
u    - unset                    unset options (type 'unset ?' for a
list)
?/h  - help                     print help information

How do you enable Hyper-V in Windows 8.1?

In case you want to run more than one operating system on your PC you may want to use Hyper-V. You can run both 32bit as well as 64 OS.

Hyper-V is included in Windows 8.1 Professional. It is quite easy to enable Hyper-V.  It is very similar to Windows Virtual PC on Windows 7. Hyper-V is needed for Windows 8 Emulator .

Right click Start on Desktop__>;Control Panel-->;Programs-->;Select 'Turn Windows features on or off'
In the Windows Features window displayed place check mark for Hyper-V as shown and enable both Hyper-V GUI Management Tools and the Hyper-V Module for Windows PowerShell.

That is all there is to it.
The above image is captured on a Windows 8.1 Professional on a Toshiba S70 Series laptop.