How to turn you Raspberry Pi into a network speed monitor
OpenWrt Wiki] Raspberry Pi
Monitor your Internet with a Raspberry Pi | Jeff Geerling
Amazon.com: DIGISHUO Raspberry Pi 3 Model B+ Plus Board 1G Ram 400MHz Wireless LAN and Bluetooth 3B+ Version 1. 4GHz 64-bit Quad-core ARMv8 CPU : Electronics
Getting Gigabit Networking on a Raspberry Pi 2, 3 and B+ | Jeff Geerling
Raspberry Pi 3 vs Pi 2: A Real-World Performance Comparison