Which of the following is a direct benefit of implementing Variable Length Subnet Masking (VLSM) in an IPv4 network? Select all that apply.

### Why this is right - **Saving address space**: differently sized subnets can better fit networks with different needs. - **Facilitating summarized routes**: organized subnet allocations can make it easier to represent multiple networks with a summary. - **Easing administration and troubleshooting**: the material lists this as a VLSM benefit. ### The concept VLSM is an address-planning method. It can improve how address space is divided, but it does not control whether traffic is permitted. Traffic permission is a separate function of network security policies and devices such as firewalls. Keeping address design separate from traffic control avoids confusing a routing or addressing benefit with a security action. ### The other options - **D. Guaranteeing that all Internet traffic is permitted**: address masks do not grant traffic permission. That is a security-policy decision. ### Terms - **VLSM**: Variable Length Subnet Masking. A way to create differently sized subnets. ### Remember Address planning affects subnet structure, not firewall permission.