Ethernet RJ45 Speeds & Cables - Everything you Need to Know as Fast As Possible
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Description
Ethernet, Networking, RJ45... So you don't know any of this stuff from a hole in the ground. Watch this video and know the basics in less than 4 minutes! FORUM LINK: linustechtips.com
The video introduces RJ45 Ethernet cables and the key factors that influence networking performance. It starts by outlining the common link speeds you’ll encounter today, including 100 megabits per second, 1 gigabit per second, and 10 gigabits per second, and notes that the actual speed you get depends on both ports and cables. The presenter emphasizes that the physical appearance of cables and ports can be deceiving, so you may need to check manufacturer specifications, the side of the cable, or the box to confirm the maximum supported speed. He explains that data integrity and achievable speeds are affected by cable quality, noting that a high-speed link can be degraded by a low-quality cable and that you can only run in full speed steps. The video then covers practical categories of cables, highlighting Cat 5e for gigabit up to 100 meters and Cat 6 for up to 100 meters at 10 Gbit, with a reminder to read the fine print on the cable to determine exact capabilities. It also provides actionable troubleshooting steps: reseating connectors to remove oxidation, inspecting for tight bends or kinks, and verifying total cable length in the run. Finally, the presenter recommends upgrading to higher category cables if the current setup cannot sustain the desired speed and ends with a quick call to subscribe for more concise tech quickies. The overall takeaway is that achieving the fastest possible Ethernet connection requires matching port capability with a suitable, properly installed cable and paying attention to physical length and layout constraints.
Topics · Networking · Home Networking · Computer Hardware · Ethernet Standards
Questions answered
- What are the most common Ethernet speeds mentioned for RJ45 connections and how do they relate to megabits per second?
- The video notes common speeds of 100 megabits per second, 1,000 megabits per second (1 Gbps), and 10,000 megabits per second (10 Gbps), with 1 Gbps equivalent to 1,000 Mbps.
- How can you determine the exact speed a device or cable supports when it isn’t obvious from the port or connector?
- Check the manufacturer’s specifications on their website or look for markings on the cable itself, including side printing that indicates the category and distance capabilities.
- What practical steps can you take to troubleshoot a slow network connection before replacing cables?
- Reinsert the connectors to clean oxidation, inspect the cable run for sharp bends or kinks, and verify the total length to ensure it doesn’t exceed the cable’s rated distance.
- When should you consider upgrading to higher category cables?
- If testing shows you cannot achieve the desired speed due to limitations of the current cable, upgrading to a higher category cable (and possibly higher quality) is advised.