Which CPUs does the P11C-M/4L support?

It supports Intel Xeon E-2100 processors along with Core i3, Pentium and Celeron chips on the LGA1151 socket. Check the CPU support list before buying, since not every LGA1151 chip works.

How much memory can it take?

It has four DDR4 DIMM slots, so it can hold substantially more memory than typical two-slot micro-ATX boards. Use matched modules and follow Asus's qualified memory list.

What are the four LAN ports for?

They are Intel Gigabit Ethernet ports, useful for firewall, router and multi-network server builds. You can assign them to separate networks without adding expansion cards.

Is it good for a home firewall or router build?

Yes. Four onboard Gigabit ports and a compact micro-ATX layout make it a natural fit for pfSense-style firewall and router builds. A low-power Xeon E or Core i3 keeps heat and power draw down.

Does it fit a standard micro-ATX case?

It is a micro-ATX board, so it fits cases that accept micro-ATX or larger ATX motherboards. Check clearance for the CPU cooler and any add-in cards.

The board ships with its I/O shield and basic accessories such as SATA cables, depending on the retail pack. Confirm the contents with the seller before ordering.