The outer sleeve acts as insulation so there isn’t a risk of shocking yourself by wiping the cable with a damp cloth. You could also use a wet wipe or baby wipe to clean off the cable. The markings may be printed multiple times on the cable’s sleeve and they’ll all include the same letters and numbers.
RF cables are often less flexible than other coaxial cables as well.
HDTVs require even more insulation against static, so they use an RG-11 coaxial cable instead of an RG-6.
The ethernet cable connected to your computer or TV isn’t a coaxial cable. The coaxial cable is connected to your modem.
The RG-8X cable is very similar to an RG-8 cable but is better suited for audio signals.
