I get most of the subnetting things, I think.
For example how to calculate how many subnets / hosts / Network ID / broadcast ...
Having said that what confuses me is if the subnet is a full octet!
I don't understand how to calculated subnets based on subnets like
10.1.0.0
255.255.255.0
I'm NOT confused (I don't think) about class or unclassfull / cidr stuff. This address is a common address used by many routers and companies. It’s a class B but based on the mask it’s a class C. But that doesn’t matter cause its cidr, and classes are not used any more, (basically).
I'm just use to doing supernetting (I think its call) but confused when you
have an IP that is a full Octet.
for example
Here is my math on the above address.
10.1.0.1
0000001010.00000001.00000000.00000001 >IP 10.1.0.1
1111111111.11111111.11111111.00000000 >Subnet Mask 255.255.255.0
0000001010.00000001.00000000.00000000 Network IP 10.1.0.0 using Anding.
.11111111 I just add 1's to host bits to get broadcast
address. 10.1.0.255
I think that there are 8 subnet bits in the third octet and 8 host bits in
the 4th octet, that should give me 256 subnets (minus 2) and 256 hosts
(minus 2)
HOWEVER when I look at an ip subnet calculator I see that there are 65536
subnets available and 256 hosts. I'm confused where the 65536 subnets comes
from (other than its 2^16=65536) Where did the 16 bits come from for the
subnet.
Thanks.
For example how to calculate how many subnets / hosts / Network ID / broadcast ...
Having said that what confuses me is if the subnet is a full octet!
I don't understand how to calculated subnets based on subnets like
10.1.0.0
255.255.255.0
I'm NOT confused (I don't think) about class or unclassfull / cidr stuff. This address is a common address used by many routers and companies. It’s a class B but based on the mask it’s a class C. But that doesn’t matter cause its cidr, and classes are not used any more, (basically).
I'm just use to doing supernetting (I think its call) but confused when you
have an IP that is a full Octet.
for example
Here is my math on the above address.
10.1.0.1
0000001010.00000001.00000000.00000001 >IP 10.1.0.1
1111111111.11111111.11111111.00000000 >Subnet Mask 255.255.255.0
0000001010.00000001.00000000.00000000 Network IP 10.1.0.0 using Anding.
.11111111 I just add 1's to host bits to get broadcast
address. 10.1.0.255
I think that there are 8 subnet bits in the third octet and 8 host bits in
the 4th octet, that should give me 256 subnets (minus 2) and 256 hosts
(minus 2)
HOWEVER when I look at an ip subnet calculator I see that there are 65536
subnets available and 256 hosts. I'm confused where the 65536 subnets comes
from (other than its 2^16=65536) Where did the 16 bits come from for the
subnet.
Thanks.