Help with a topic - IP subnet

gNashgNash Registered Users Posts: 4 ■□□□□□□□□□
For exam 70-680
I know with a little experience some basics of networking, but I'm struggling with a particular area of IP addresses, which I'm encountering in a practice test from Microsoft.
Hoping someone can dumb this topic down for me.

Question goes:
"You have created the statically configured wired subnet Currently the only device on the subnet is a router with the IPv4 address You plug a computer into an Ethernet port on the subnet. What command configures the computer correctly on the subnet?"

It says the answer to this question is:
netsh interface ipv4 set address "local area connection" static [COLOR=#800080][B][/B][/COLOR] [B][COLOR=#ff0000][/COLOR][/B] [B][COLOR=#008000][/COLOR][/B]

I don't understand...:
  • ...what the "/25" part is in the IP address in the question. I looked up slash notation online but not sure if that is relevant to the question and answer...?
  • ...where the IP address and come from.


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