# Subnetting question

Got a question, if someone can explain it to me -i took my CCNA, but like 7 years ago, and i forgot a lot of the theory.

If i have the network: 132.45.0.0 /18

1) What is the subnet? (this is the only one i could get - 255.255.192.0)
2) What is the bit mask?
3) I need to establish 8 subnets
3a) How many binary digits are required to define 8 subnets
3b) What is the subnet mask for the 8 subnets
3c) what would the IPs be for all 8 subnets
Networking

Last Comment
Mystical_Ice
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)

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Ernie Beek

Can't beat hanccocka with this :)

But have a look at: http://www.subnet-calculator.com/cidr.php
It's a nice tool which can help you out (myself as well when I'm lazy ;)
Mystical_Ice

"If you want 8 subnets, you would need to move to a subnet mask of 255.255.224 or /19 (mask bits)", is that because it's a certain class subnet?

I remember the "n-2" number of subnets and "n-2" number of hosts, but you need to know what class it is first to do that right?
it's the mask bit, you need to apply a mask bit of /19 (255.255.224.0) to divide up the network range into 8 subnets.
you can use this class of network, just use a subnet mask of /19.
Mystical_Ice

But as far as how many bits are for the host and how many bits are for the network, don't you need to know how many bits are 'borrowed' first?  Like in the example i posted that you helped me with, don't you need to know it's borrowing 2 bits from network and leaving 14 (8+6) for host?

my question is how do you know it's borrowing 2 bits - don't you need to know the class of network to be able to tell?
what are you tryimg to resolve?
thats another question?

one question per question.
Please post a new question, and link to this question as an example or relatef question.
Mystical_Ice

Will do; thanks :)
Networking

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

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