Confused on ip default-network

Dear pedenski,

I am new member of Firewall.cx, so I am not aware how to copy & paste the images as U did & how to do to letter bold.

Could you plz guide me????

Regards,
Swapnil

oh.. actually, when i bought the book theres a cd included.. and the contents include a pdf file of the book.. and so, instead of scanning my book, might as well, printscreened the pdf file and cut to post it here..

@topic

haha.. Im so noob.. thank you for clearing that out..
168.13.0.0/24 is subnetted, 4 subnets shows that the subnets being used is a classfull...

thanks alot.. ^^