Do all four wires of an ethernet cable need to be connected at both ends for it to work properly? - Quora
![network - Ethernet connection between rooms doesn't work: LEDs 2, 3 and 4 don't blink on cable tester - Home Improvement Stack Exchange network - Ethernet connection between rooms doesn't work: LEDs 2, 3 and 4 don't blink on cable tester - Home Improvement Stack Exchange](https://i.stack.imgur.com/oThqQ.jpg)
network - Ethernet connection between rooms doesn't work: LEDs 2, 3 and 4 don't blink on cable tester - Home Improvement Stack Exchange
![Friends Ethernet is bad on his computer. I examined the connection that ATT did and saw this. The yellow cable going to the router has 2 out bound wires spliced together to Friends Ethernet is bad on his computer. I examined the connection that ATT did and saw this. The yellow cable going to the router has 2 out bound wires spliced together to](https://preview.redd.it/friends-ethernet-is-bad-on-his-computer-i-examined-the-v0-68d6q0pu1xda1.jpg?width=640&crop=smart&auto=webp&s=61172aec63a6417937ac2972ed8e0c153ed53cde)
Friends Ethernet is bad on his computer. I examined the connection that ATT did and saw this. The yellow cable going to the router has 2 out bound wires spliced together to
![Just moved into a new house, there are no RJ45 connectors only RJ11 and these 4 Ethernet cables which are in wire nuts as you see below. Anyone know why or have Just moved into a new house, there are no RJ45 connectors only RJ11 and these 4 Ethernet cables which are in wire nuts as you see below. Anyone know why or have](https://preview.redd.it/lfoo5vf2x0s81.jpg?width=640&crop=smart&auto=webp&s=cfe13d1acbcce0040897375767b5a6c59b59e3e5)