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Matt Hieter

https://itpro.tv/course-library/network1/subnetting-example-16/
Subnetting example 4
If I add up 128+64+32+16+8+4+2+1 we get 255
When we borrow a digit from the network we double 256 (256+256) then -(2) Subtract 1 for the subnet IP and 1 for the Broadcast IP

``````1. 192.168.00000000 |.00000000 /24 (254 hosts) 256-(2)=254     (2) being the Subnet IP and the Broadcast IP
2. 192.168.0000000   | 0.00000000 /23 (510 hosts) If we borrow 1 bit from the network side we can double our host. 256+256=512-(2)=510
3. 192.168.000000     | 00.00000000 /22 (1022 hosts) If we borrow another 1 bit from the network side we can double our host again.  answer 512+512=1024-(2)=1022
4. 192.168.00000       | 000.00000000 /21 (2046 hosts) If we borrow another 1 bit from the network side we can double our host again.  1024+1024=2048-(2)=2046
``````

If I add up 128+64+32+16+8+4+2+1 we get 255
Why do we double 256 and not 255

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Matt Hieter

Thank you Ronnie!

In Don's video and in his notes he list the Subnet as 172.16.???.000 - 172.16.42.0
Correct me if I am wrong but shouldn’t the subnet have been 255.255.252.0
If I am wrong then I do not understand the definitions of:
Subnet:

Truly grateful,

Confused - Matt

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Matt Hieter

Hello,
Network ID
Subnet IP
Are they the same thing?
In my attempt to understand Network+ Subnetting Example #3
Subnet IP ------ 172.16.???.0 - 172.16.42.0
First Usable IP - 172.16.???.1 - 172.16.42.1
Last Usable IP - 172.16.???.254 - 172.16.43.254
Broadcast IP ---- 172.16.???.255 - 172.16.43.255
I have been viewing YouTube videos on Subnetting and want to clarify; Is the Network IP discussed in the YouTube video linked below the same thing as the Subnet IP discussed in ITPro Network+ Subnetting Example #3?
:)
I found this on helpful: https://youtu.be/nFYilGQ-p-8
PS I searched the forum but my search results for "Network ID" found results but I did not find the results helpful.
Matt

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Matt Hieter

I was intrigued with Rick Sidewells suggestion of adding a third router. since the routers are in different areas of the house and no easy way to connect them with Ethernet cable. I opted for Ronnie's cloud print and it worked as follows:

• In a new tab, open chrome://devices

• You’ll see a list of devices already registered with Google Cloud Print, and new devices available on the network.

• Under "Classic printers,” click Add printers.

You'll see a confirmation that Google Cloud Print has been enabled..

• I then logged out of my Google account on this computer.
I now see the printer that is on my wife's network in my list of available printers to print to :)

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Matt Hieter

Yes! I have two providers with the cheapest plans available on each and the traffic spread out so we have enough speed to watch Netflix on one network while a PC is downloading windows updates on the other network and no unhappy family members. Plus if one network goes down we still have access via the other. :)

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Matt Hieter

Is this a technique that I could use to configure printer sharing? I have a Motorola home router from Comcast cable on the 10.10 range and an Actiontec router on the 192.168 range. Can you give me a link to directions that you think might work. Printers and PCs on both networks.

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Matt Hieter

Apple’s smartphone share was 32.6% September when the iPhone 6 was launched and even the larger screen iPhones do not seem to be creating a long-term shift in market share

Android’s share of the US smartphone market is 58.1% Forbes.com
Perhaps Android should have been the first choice.