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- What is a subnet mask, and the difference between a subnet mask of 255 . . .
The 255 represents all 1's for that byte of the address and when you perform a bit-wise AND between the address and the mask, you get the network number back What's left is the machine number So IP Address 192 168 1 1 Subnet mask 255 255 255 0 Network Number 192 168 1 0 Host Number 1 Address Range 192 168 1 1 to 192 168 1 255 Alternately,
- networking - Subnet mask of 255. 255. 255. 255 - Super User
255 255 255 255 is a broadcast address same as 0 0 0 0 if you want two endpoints the subnet mask would be 255 255 255 254 (however this still won't do what you are asking What you are asking for is VLANs or PVLANs (virtual or private lans) This would require hardware capable of layer2 switching and VLAN support at least
- networking - Static IP address of 255. 255. 255. 255 - Super User
255 255 255 255 represents the local broadcast address, which is only propagated within the network This broadcast data cannot cross routers by default That is, it is a restricted broadcast address For the local host, this address refers to all hosts in the network segment (same broadcast domain)
- Why cant IP addresses start with 0 or 255? - Super User
The IP address 255 255 255 255 is used to indicate a local broadcast Because this decision was part of the classful network design that predates CIDR, to reserve these specific IP addresses alone, special rules would have had to have been created for the 8's that contained them Since some 8's were going to remain reserved anyway, it made
- So what does 24 have to do with 255 in hosts IP addresses?
As you have mentioned 192 168 10 0 24 specifies the range between 192 168 10 0 to 192 168 10 255, 24 specifies number of masked bits out of 32 starting from left So, in binary 24 would be represented as 1111 1111 1111 1111 1111 1111 0000 0000 and it is called a mask since first 24 bits of all IP's in this range are going to be same
- networking - Why subnet mask for IP 10. 0. 1. 4 is 255. 255. 255. 0 . . .
So if your router has decided to use a subnet mask of 255 255 255 0 and to give you an IP address of 10 0 1 4, that means it is going to be handing out IP addresses in the range from 10 0 1 1 through 10 0 1 254 (potentially) to other computers which request an address
- How are numbers greater than 255 denoted in binary?
In your example, you've used an 8 bit (one byte) number, which does max out at 255 Ever since forever, computers have used numbers that are larger than one byte For example, in Fortran (invented in 1977) 'real' numbers use 4 bytes, and can store numbers up to 11111111 11111111 11111111 11111111 = 2,147,483,647
- What are the valid public IP address ranges? - Super User
Combining the lists from BrianC and hmuller I figured that 3 ranges do overlap: 192 31 196 0 24; 192 52 193 0 24
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