Is the local LAN IP range of 192.168.35.0/20 suitable for local extensions?

The local LAN IP range of 192.168.35.0/20 is indeed suitable for local extensions, and here's why.

This IP range allows for a significant number of usable addresses. Specifically, the subnet mask of /20 indicates that 20 bits are used for the network portion, leaving 12 bits for the host portion. This translates to 2^12 - 2, which equals 4094 usable IP addresses (the subtraction is necessary to account for the network and broadcast addresses, which cannot be assigned to hosts).

In a typical networking scenario, this range provides ample IP addresses for local extensions, allowing numerous devices (like IP phones, computers, and other network-enabled devices) to operate within a local area network without the risk of any address conflicts. The fact that it falls within the private IP address range (which includes 192.168.0.0 to 192.168.255.255) makes it ideal for internal networks as these addresses are not routable on the public internet.

Therefore, employing the 192.168.35.0/20 range for local extensions is practical, supporting both scalability and manageability of the network infrastructure.