192.168.0.0/20 - subnet mask = 255.255.240.0 which means that this address covers 16 class C addresses ie. 192.168.0.0/24 - > 192.168.15.0/24 . so it is not a subnet address because that is when you take a classful network and use more of the host part for the network part but it is still a valid address range. Jon
Mar 28, 2002 · Valid subnet address: To figure out the valid subnet address, simply subtract the subnet mask from 256. For example, if you had a Class A mask of 255.240.0.0, the equation would be 256-240=16. Dec 19, 2019 · The subnet mask is used by the TCP/IP protocol to determine whether a host is on the local subnet or on a remote network. In TCP/IP, the parts of the IP address that are used as the network and host addresses are not fixed, so the network and host addresses above cannot be determined unless you have more information. Subnet Mask Wildcard 255 1111 1111 0 0000 0000 254 1111 1110 1 0000 0001 252 1111 1100 3 0000 0011 248 1111 1000 7 0000 0111 240 1111 0000 15 0000 1111 224 1110 0000 31 0001 1111 192 1100 0000 63 0011 1111 128 1000 0000 127 0111 1111 0 0000 0000 255 1111 1111 Subnet Proportion Classful Ranges A 0.0.0.0 –127.255.255.255 B 128.0.0.0 -191.255 Jun 25, 2020 · An IPv4 subnet mask is a 32-bit sequence of ones (1) followed by a block of zeros (0). The ones designate the network prefix, while the trailing block of zeros designates the host identifier. In shorthand, we use /24, which simply means that a subnet mask has 24 ones, and the rest are zeros. The CIDR number comes from the number of 1's 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 1's, or /24 (pronounced 'slash twenty four'). Aug 26, 2011 · CIDR. Subnet Mask. Total IPs. Usable IPs /32: 255.255.255.255: 1: 1 /31: 255.255.255.254: 2: 0 /30: 255.255.255.252: 4: 2 /29: 255.255.255.248: 8: 6 /28: 255.255.255
VLSM Workbook Student Edition - ver 2 0
IP Tutorial: Subnet Mask and Subnetting Subnet Mask. Perhaps the most recognizable aspect of subnetting is the subnet mask. Like IP … Subnetwork - Wikipedia A subnetwork or subnet is a logical subdivision of an IP network.: 1,16 The practice of dividing a network into two or more networks is called subnetting. Computers that belong to a subnet are addressed with an identical most-significant bit-group in their IP addresses.This results in the logical division of an IP address into two fields, the network number or routing prefix and the rest field
Class: Size: Subnet Mask: Range of IPs: Class A: 10.0.0.0/8: 255.0.0.0: 10.0.0.0 - 10.255.255.255: Class B: 172.16.0.0/12: 255.240.0.0: 172.16.0.0 - 172.31.255.255
Understanding TCP/IP addressing and subnetting basics Dec 19, 2019 Variable Length Subnet Mask (VLSM) Tutorial - Fully Explained Jun 25, 2020