Just had my desktop out of action for a day - 'not connected to internet' - tried every plug and still didn't work, unplugged, etc. Kept mentioning Ethernet (?) cable, knew I had a box of computer cables then remembered I'd given them all away as would never use ..... Same again this morning and then - miracle! This is the second time it has happened, connection doesn't seem that good, so ordering another cable from Amazon this morning. Before I do, are they all the same, just varying in length, please?