Windows 10: Ethernet adapter subnet mask

This morning I updated my wife's laptop to the latest build of Windows 10. I borrowed the ethernet cable I use for my laptop so I could use a faster connection.

For some reason, the Ethernet connection could not "find" the internet. Delving a little deeper I noticed the subnet mask did not look right. I ran ipconfig from a powershell and below are the relavant bits of the 2 adapters used on this machine:

Code:

I am fairly certain the subnet mask (which should be 255.255.255.0) is the culprit and I note that the IPv4 address is not part of the local network.

Machine specs:
Laptop Acer Aspire E5-573
RAM 4Gb
HDD 1Tb
Windows 10 (1909 Build 18363.778)

TIA for any help

:)

 

Ethernet adapter subnet mask

This morning I updated my wife's laptop to the latest build of Windows 10. I borrowed the ethernet cable I use for my laptop so I could use a faster connection.

For some reason, the Ethernet connection could not "find" the internet. Delving a little deeper I noticed the subnet mask did not look right. I ran ipconfig from a powershell and below are the relavant bits of the 2 adapters used on this machine:

Code:

I am fairly certain the subnet mask (which should be 255.255.255.0) is the culprit and I note that the IPv4 address is not part of the local network.

Machine specs:
Laptop Acer Aspire E5-573
RAM 4Gb
HDD 1Tb
Windows 10 (1909 Build 18363.778)

TIA for any help

 

Ethernet adapter subnet mask

Thanks for the great explanation! It's been over 30 years since I last delved into computer science and this is an excellent refresher of networking basics.
*Thumbs

 

How do I find what the Subnet Mask and DNS are?

Open a command prompt and run type:

ipconfig /all

The list will show your settings for each adapter, including the DNS settings

Resulting like the following example:

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :

Description . . . . . . . . . . . : Intel(R) Ethernet Connection I217-LM

Physical Address. . . . . . . . . : xx-xx-xx-xx-xx-xx

DHCP Enabled. . . . . . . . . . . : No

Autoconfiguration Enabled . . . . : Yes

IPv4 Address. . . . . . . . . . . : 192.168.1.113(Preferred)

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . : 192.168.1.1

DNS Servers . . . . . . . . . . . : 208.67.222.222