The subnet mask (and IP version 4 addresses) are actually a single 32-bit number. They can be (and usually are) written out as four decimal numbers for human benefit, but that doesn't have any meaning to computers or network devices. Computers only deal with the binary meanings.

I have never tried using a /31 but I can say that the 2 address you have configured 192.168.5.2 and 192.158.5.1 are different segments if you use a /31 mask (255.255.255.254) what happens if you use .2 and .3? (may require you to change some static routes) What is the practical use of a /31 CIDR or 255.255.255.254? The /31 subnet only has two hosts - one for network and another for broadcast. I am wondering why would someone ever use this subnet. What is the practical use of a /31 CIDR or 255.255.255.254? Ask Question Asked 1 year, 10 months ago. Active 4 months ago. Viewed 5k times 19. 3. With a /31 subnet, we are left with zero usable hosts. Subnet Mask Cheat Sheet - kthx.at IPv6 Subnet Cheat Sheet. IPv6 is a complete and different animal as far as subnetting goes. Please note the yellow rows as each has special common use or notes. If there is nothing in the "Amount of a /64" column that means it is to miniscule or to massive to justify calculation. Not much is the same with IPv6 compared to IPv4. Introduction to Subnetting - How to Calculate Subnets Jan 15, 2020

Subnet Mask Cheat Sheet - kthx.at

This free online IPv4 subnet calculator also can be used as a teaching tool and presents the subnetting results as easy-to-understand binary values. We can see two things: all host bits are zeroes in a network address, in a broadcast address they are all set. First bits determine the class of your network from A to E. A, B and C are commonly used.

Imagine you have a subnet of 192.168.0.0 with a mask of 255.255.255.0 Now you know that you have 254 hosts available. Why? Because the HOST portion of the subnet in bold 192.168.0.0 equal the formula 2^8 - 2 = 254 So your valid hosts would be 192.168.0.1 to 192.168.0.254 The network address is: …

Oct 04, 2019 Free online IPv4 subnet calculator - adminsub.net This free online IPv4 subnet calculator also can be used as a teaching tool and presents the subnetting results as easy-to-understand binary values. We can see two things: all host bits are zeroes in a network address, in a broadcast address they are all set. First bits determine the class of your network from A to E. A, B and C are commonly used. Using /31 (255.255.255.254) gives you two addresses per subnet. You use them both as hosts. The drawback is that broadcasts are limited. Here's the official Cisco take on it: "RFC 3021 describes using 31-bit prefixes for point-to-point links. This leaves 1 bit for the host-id portion of the IP address.