: This refers to the specific release batch of the firmware. Why Does This Specific Build Matter?
To understand what you are running, you have to decode the sequence: 3160 091 v60310 build 210407 rel7370n tlwr850n
This tells us that this specific firmware was compiled and released on . If you are running this firmware, you are using code that is now several years old. While stable, it may lack security patches released after early 2021. : This refers to the specific release batch of the firmware
Since this build is from April 2021, it may be vulnerable to security exploits discovered in the last few years. Older routers are frequent targets for botnets (like Mirai) which exploit unpatched vulnerabilities. Knowing your build date helps you check if a newer patch is available on the TP-Link support website. 3160 091 v60310 build 210407 rel7370n tlwr850n