Select ALL statements supported by the material about Variable Length Subnet Masking (VLSM).

### Why this is right - **It uses different subnet masks to define different network sizes**: this is the defining feature of VLSM. - **It can save address space**: networks can receive blocks sized more closely to their needs. - **It can support route summarization**: organized address blocks can be represented by a shorter summary route. ### The concept VLSM is an address-planning technique, not a requirement that every subnet have one particular prefix. The material gives a range of block sizes from `/25` through `/30` and explains that different network sizes can be accommodated. Address conservation and summarization are benefits, while the material also recommends avoiding VLSM on a LAN. ### The other options - **D. It requires all networks to use a `/24` mask**: this contradicts the use of different masks and is not a VLSM requirement. ### Terms - **VLSM**: Variable Length Subnet Masking. A technique for subnetting with different mask lengths. ### Remember VLSM gives different-sized networks different-sized address blocks.