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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
- 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
- What is the diference between IP subnet mask 255. 255. 254 . 0 . . . or 255 . . .
255 255 255 0 allows for a total of 254 IP addresses to be used 1 is for the subnet itself and another for the broadcast Best example of this is the network 192 168 1 0 That is the ip of the subnet itself 192 168 1 1-192 168 1 254 are all valid IPs That can be assigned to client devices Finally, 192 168 1 255 would be the broadcast address
- How to find how many hosts are on subnet mask: 255. 255. 255. 252?
(255 - 252) + 1 = 4 You +1 because it's networks between 252 and 255, including 252 The netmask for a Class A network should be 255 0 0 0, a Class A network is unusually large for a home network as it has 255 255 255 255 - 255 0 0 0 = 16,777,216 addresses Also, you got the binary wrong IPv4 addresses are made up of four 8-bit bytes, as so:
- Change subnet mask from 255. 255. 255. 0 to 255. 255. 255. 255
The "all ones" subnet mask (255 255 255 255) only works for point-to-point links, where there's only two devices on the link, so anything Device A transmits can only get to Device B, and anything Device B transmits can only get to Device A, because there's no way for there to be any other devices on that network link
- 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
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