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The author presents GopherTree, a Gopher client that displays menus as directory trees rather than web-like interfaces. The client hides informational selectors by default and fits within a thousand lines of C code. It includes features like a built-in text viewer, bookmarks, and aims to avoid the distraction of hypertext browsing.

The author has made their website available via the Gopher protocol, which uses simple text-based menus for navigation instead of hyperlinks. They explain Gopher's directory-style format and contrast it with modern web protocols, noting its historical interest and simplicity compared to alternatives like Gemini.

The article explains how TCP's initial congestion window of 10 packets results in approximately 13 kB of data being transferred in the first round trip. This occurs because TCP uses slow start to avoid network congestion, gradually increasing transmission speed. The author suggests web developers should ensure critical content fits within this initial 13 kB for optimal page loading.

The author explains that IPv4 addresses have been exhausted since 2011, leading to multiple users sharing addresses and causing problems like IP blocking. IPv6 with 128-bit addresses was standardized in 1995 but adoption remains low. To encourage IPv6 adoption, the author will disable IPv4 access to their site on the 6th of each month.

The MCUfont is a 5x5 pixel font designed for tiny screens on microcontrollers. It fits within 350 bytes of memory and maintains legibility while allowing constant-width character rendering. The font is based on earlier 5x6 designs and works well on low-resolution displays.