If you get a subnet like 192.168.0.0 with a mask 255.255.255.192, without hesitation you must calculate 256 - 192 = 64 hosts per subnets ( subtract 2 for bcast and network) 255.255.255.128 = 256 - 128 = 128 - 2

Oct 17, 2019 · The CIDR number comes from the number of ones in the subnet mask when converted to binary. The common subnet mask 255.255.255.0 is 11111111.11111111.11111111.00000000 in binary. This adds up to 24 ones, or /24 (pronounced ‘slash twenty four’). A subnet mask of 255.255.255.192 is 11111111.11111111.11111111.11000000 in binary, or 26 ones C. A /29 is 255.255.255.248, which is a block size of 8 in the fourth octet. The subnets are 0, 8, 16, 24, 32, 40, etc. 192.168.19.24 is the 24 subnet, and since 32 is the next subnet, the broadcast address for the 24 subnet is 31. 192.168.19.26 is the only correct answer. Class B # of bits: Subnet Mask # Subnets # Hosts: 2: 255.255.192.0: 2: 16382: 3: 255.255.224.0: 6: 8190: 4: 255.255.240.0: 14: 4094: 5: 255.255.248.0: 30: 2046: 6 Thus the Subnet mask can be denoted as /29. With Network ID it can be denoted as 192.168.1.9/29. From the above notation, anyone who knows the standard notation and formulae of subnetting can understand that the IP is using a subnet mask of 255.255.255.248 or /29. The different Subnetting scheme in binary and decimal notation is shown below: Dec 20, 2019 · * Calculate the no. of bits in the Network ID. Converting the subnet mask 255.255.255.248 into binary, we obtain: 11111111.11111111.11111111.11111000 Hence from this we can conclude that it is a /29 mask. So the subnet mask will be 255.255.255.248. If we use the last octet 248. 256-248 = 8, this means the last octet 0-255 is broken up into 32 groups of 8.

## Class B # of bits: Subnet Mask # Subnets # Hosts: 2: 255.255.192.0: 2: 16382: 3: 255.255.224.0: 6: 8190: 4: 255.255.240.0: 14: 4094: 5: 255.255.248.0: 30: 2046: 6

A subnet is division of an IP network (internet protocol suite), where an IP network is a set of communications protocols used on the Internet and other similar networks. It is commonly known as TCP/IP (Transmission Control Protocol/Internet Protocol). The subnet calculator allows the use of a single subnet bit - for example, a class C address with a subnet mask of 255.255.255.128 is permitted. The subnet calculator allows a subnet ID to have its final octet equal to the final octet of its subnet mask - for example, a class C network address of 192.168.0.192 with a subnet mask of 255.255.255 Addresses Hosts Netmask Amount of a Class C / 30: 4: 2: 255.255.255.252: 1 / 64 / 29: 8: 6: 255.255.255.248: 1 / 32 / 28: 16: 14: 255.255.255.240: 1 / 16 / 27: 32: 30 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.

### Size: 1. Netmask: 255.255.255.255 or /32 Any address. Note: This is a rather small subnet. Size: 2. Netmask: 255.255.255.254 or /31 Starts with even address.

CIDR. Subnet Mask. Total IPs. Usable IPs /32: 255.255.255.255: 1: 1 /31: 255.255.255.254: 2: 2* /30: 255.255.255.252: 4: 2 /29: 255.255.255.248: 8: 6 /28: 255.255.255 For example, a single 192.168.16.0/24 address range can be split into two by extending the subnet mask by borrowing one bit, transforming the subnet mask from a /24 to a /25 or a 255.255.255.128 in decimal notation. 255.255.255.248: Solutions Let’s count the number of hosts first, A/Q we need minimum 25 hosts on each network. It means, we have to reserved 5 bits for the host 255.255.255.248. The subnet mask defines how large each subnet is. You can do this in binary but I’ll use decimal since it’s faster. A quick method is to take the number 256 minus the subnet mask. We are looking at the 4th octet so that’s 248: 256 - 248 = 8. We now know that each subnet has 8 addresses. Let’s start counting from 0 to