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| Definition | : | Variable Length Subnet Mask |
| Category | : | Computing » Networking |
| Country/ Region |
: | Worldwide
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| Popularity | : |
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A Variable Length Subnet Mask (VLSM) is a method of allocating IP addressing resources to subnets according to their individual need rather than some common network-wide rule. VLSM allow the use of different masks for the same network, which allows to conserve IP addresses and use available address space more efficiently.
The full form of VLSM is Variable Length Subnet Mask