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Subnet Mask
Name: ehsan Date: October 20, 2000 at 11:47:03 Pacific
Name: Peer Date: October 20, 2000 at 18:16:15 Pacific
Reply:
for a detailed look, Look at: http://webopedia.internet.com/TERM/s/subnet_mask.html
I'll try to explain. In a network 10.0.0.0 If there are computers from 10.0.0.1 to 10.255.255.255 all on the same network and it doesn't go through the Gateway to get it (on the LAN) it has a subnet mask of 255.0.0.0 because in binary all the "1"s from the subnet mask indicate when the Computer's IP and the destination IP are compared. If the spaces with the 1's are the same in the sourse and destination, it knows it doesn't need to go through the router and the LAN will cover it. so in this case if you were 10.0.0.1 trying to connect to 10.255.0.1 the subnet mask of 255.0.0.0 will compare the entire first block. They will be the same for both and thus it doesn't need to be gatewayed. It's confusing but once you get it it makes sense
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Response Number 2
Name: techtony Date: October 22, 2000 at 18:07:08 Pacific
Reply:
Very, very simply, 255's indicate network address and the 0's indicated PC addresses. So 192.8.16.5 with 255.255.255.0 means the network is 192.8.16.0 and the individual PC is indicated by the last 5. Way, way more complicated than that, but thats all you need for very small Lans. The gateway address is the ip address of the router port and will be the same on all machines for a single router lan.
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Response Number 3
Name: karuna Date: December 1, 2000 at 04:36:16 Pacific
Reply:
can u please tell me the answer and explanatiton for the following question: an organization is granted class c address .The administration wants to create at least 12 subnets with at least 30 hosts on each network.Find the best mask for this situation.
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Response Number 4
Name: Tom Date: December 12, 2000 at 12:55:07 Pacific
Reply:
you can't do this with C class address, if you want 30 hosts on each subnet, you can only have max 8 subnets. If you go to 12 subnets, you have to subnet it min. of 16 subnets with 14 hosts each. You need a Class B address for this or use a Private IP addressing, then you need NAT if you are going to use internet access.
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Response Number 5
Name: Thomas Date: February 24, 2001 at 00:14:34 Pacific
Reply:
255.255.255.0 has 254 hosts because you lose 1 ip. What about 255.255.0.0 which has 65,5434 hosts?? How do you calculate that?
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Summary: Hi, I've been looking for a way to set the default subnet mask XP uses. For example, if I set my network card to "obtain an IP address automatically", Windows chooses the subnect mask of 255.255.0.0 b...
Summary: Has anyone tried to play with the subnet mask for better network security ? For example, I have a home network which contains two computers. One has IP of 192.168.123.1. The other has 192.168.123.2. I...
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