Help with a topic - IP subnet

gNash

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 10.0.10.128/25. Currently the only device on the subnet is a router with the IPv4 address 10.0.10.129. 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]10.0.0.162[/B][/COLOR] [B][COLOR=#ff0000]255.255.255.128[/COLOR][/B] [B][COLOR=#008000]10.0.10.129[/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 10.0.0.162 and 255.255.255.128 come from.

KenC

Have a look at CompTIA Network+ N10-005: 1.3 - Subnetting | Professor Messer - CompTIA A+, Network+, Security+, Linux, Microsoft Technology Training
In case you are not aware type netsh /? from the command window.

Subnetting is one of those topics that you will always need to know, but you can go a very long time in your career without ever having to do anything with it at a practical level.
It might be a good idea to get/study for your Network+ first.

Zartanasaurus

Wow, they've made the 680 test a lot harder since when I last took it. It's for the best though. The amount of server admins I've run into that don't understand even the basics about the IP addresses, subnet masks and default gateways they are plugging in scares me.

Anyway, that /25 is very important. That's where the 255.255.255.128 came from in the netsh command.

That question is basically asking you two things:
1) Do you know the command to configure NICs at the command prompt?
2) Do you know how to subnet?

So do as KenC says and learn about subnetting. Apparently you can't pass the 680 without it these days.

gNash

Ok thanks. Yeah I guess networking is my next step after the Comptia A+. There is definitely a lot of questions I'm seeing here regarding subnetting, firewalls and VPNs for the 70-680 that I wasn't expecting to have to study.

Thanks for the link and info

kriscamaro68

You can go through the thread I made after passing the 70-680 and get an idea of what I saw on the test: http://www.techexams.net/forums/windows-7-exams/75134-passed-70-680-a.html

gNash

kriscamaro68 wrote: »

You can go through the thread I made after passing the 70-680 and get an idea of what I saw on the test: http://www.techexams.net/forums/windows-7-exams/75134-passed-70-680-a.html

Awesome thanks. I see your comment in your thread on subnetting so that should help