HDMI is an abbreviation for High-Definition Multimedia Interface. It is a digital interface that is used for transmitting audio and video signals between a source device, like a Blu-ray player, game console, or computer, and a display device, such as a TV or monitor. HDMI supports several resolutions, including standard definition (SD), high definition (HD), and 4K Ultra HD.

4K Ultra HD, also known as 4K or UHD, is a resolution standard that offers four times the number of pixels compared to 1080p HD. 4K displays have a resolution of 3840 x 2160 pixels, while 1080p displays have a resolution of 1920 x 1080 pixels. The increased pixel density of 4K displays leads to sharper and more detailed images.
To take advantage of 4K resolution, both the source device and the display device must support it. In the case of a Sony Bravia TV, all HDMI ports that support 4K are labeled as “HDMI 2.0.” HDMI 2.0 is a specification that was released in 2013 and supports 4K video at 60 frames per second (fps).
It is worth noting that some Sony Bravia models may have different labeling for their HDMI ports. For instance, some models may label their HDMI 2.0 ports as “HDCP 2.2,” which is a copy protection standard that is required for streaming 4K content from particular services.
So, to answer your question, all HDMI ports on the Sony Bravia TV that support 4K resolution are labeled as “HDMI 2.0.” If you are unsure which HDMI port to use for your 4K device, check the TV’s manual or look for the “HDMI 2.0” label on the back of the TV.
In conclusion, HDMI is an essential technology for transmitting high-quality audio and video signals from a source device to a display device. 4K Ultra HD is a resolution standard that offers incredibly sharp and detailed images, but to take advantage of it, both the source device and the display device must support it. If you have a Sony Bravia TV and want to connect a 4K device, make sure to use an HDMI port labeled as “HDMI 2.0” or “HDCP 2.2” to ensure that you get the best possible picture quality.