How To Calculate CIDR Notation
Aug 7, 2012I'm having some issues calculating CIDR notation, I'm just not able to get a solid grasp on it. [URL] but I'm not seeing how to calculate it. how to calculate it?
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At this moment I have two interfaces in use one (outside) with the IP: 172.16.21.254/24 and the other (inside) with the IP: 192.168.4.1/24. Now the customer needs to connect another network that works with the IP segment: 192.168.0.0/22.
The IP segment 192.168.0.0/22 goes from 192.168.0.1 to 192.168.3.254 that means that there is no a overlap with the network segment 192.168.4.0/24. My question is: If I configure another interface in the ASA that works in the segment 192.168.0.0/22 the routing table will auto-summary the network and merge it with the network 192.168.4.0 or will it leave the networks apart??
I don't user dynamic routing protocols but I cannot do the changes if I have doubts because the network 192.168.0.0/22 is a the Network for the Factory Automation Systems.
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header.[code]
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Jan 11, 2012Given the IP address of 172.16.10.22 and the network mask of 255.255.255.240... answer the following:
What is the network address?
What is the broadcast address?
What is the valid host IP range?
What I have done so far:
Part 1 - Broadcast address
172.16.10.22 - 10101100.00010000.00001010.00010110
255.255.255.240 - 11111111.11111111.11111111.11110000
Researching different ways to find the Broadcast address I took the binary IP address and replaced all numbers with 1's for the host bits identified in the subnet mask and came up with:
172.16.10.31 - 10101100.00010000.00001010.00011111
Is that the correct Broadcast address?
Part 2 - Network address
I am not sure what is meant by the network address and all my research has come up with either MAC addresses (obviously wrong) or CIDR notation...How do I calculate the network address?
Part 3 - List of valid IP's
Using the same address 172.16.10.22/28 I did the following:
28 is closest to 32 (block wise) so 32 - 28 = 4... 2 ^ 4 = 16 (block size)
IP address listing:
172.16.0.0
172.16.16.0
172.16.32.0
172.16.48.0
172.16.64.0
and so on...
The IP address in question is 172.16.10.22 and falls in the 172.16.0.0 - 172.16.15.0 block...
Is this the correct list of valid IPs?
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