Why do some PCs have two Ethernet ports?

Dual Ethernet ports don't automatically provide faster speed, but they increase your networking options.

Dual Ethernet ports don&#39;t automatically provide faster speed, but they increase your networking options. <p><img src="https://www.engadget.com/img/gallery/why-do-some-pcs-have-two-ethernet-ports/intro-1791217588.jpg" /></p>