How do you calculate the default gateway using cidr or slash notation

I had this question in the Microsoft Certified Technology Specialist - 70-680, configuration Windows 7 Measureup asking me to find the default gateway to the IP 192.168.123.128 with a rating of 26.

I was wondering how do I work this? I'm really bad about that. If anyone has the time to help with this it would be great.

I know CIDR is used to find the subnet mask, but do not know how to default gateways or IP addresses.

Thanks in advance.

Hello

I suggest you to send your request in the below link and check if it helps.

http://social.Microsoft.com/forums/en/CertGeneral/threads

Tags: Windows

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