Yup, that's AMP cables. Don't worry, the quality are quite good.
Anyway, I found some homeplug products, looks like quite good for normal day to day usage.
As said, transfer data from 1 point to another need time, cable's transfer rate maybe fast, but limitation forever are from our PC.
Given a 100000GBPS cat9 cable for you also no use. Is just like current AV trend, all going for 4K. But does everyone understand what is that? And how many equipment really support it?
Don't fooled by some on the number games. Got money, change all, else just stick with what ever is done.
Like now I'm planning to network my AC Ryan, but after calculate, laying cable are not cost effective at all. Running casings, 60M of cables(rm4/M). At Lowyat, 2 homeplug only rm270 and I no need to headache how to hide the cables.
And I scored a Marantz AV amp SR6007 for rm2300(ZIIP) yesterday, cash rm2299. Since I'm doing ZIIP, I thought want to go 1 level higher, the SR6007 which is rm2999. But the SA tells me that don't waste the money as the difference are 6007 can only do 10W more compare to 5007, rest of the components(power supply) are the same. For AV amps, the power supply are very important.
Ferrite core are mainly for noise rejection, you won't really see the significant difference.

Sometimes during laying the cables some of the wires might be broken due to force and quality of cable. Lan cable consist of 8 wires in 4 pairs.


So better to check all wires in the cable are working by using simple tester. Contractor should have the basic ones.

The tester only good for connection testing, but for the cable photo you attached is Cat 6, need noise tester that cost few Grand. Sometime the contractor may cut bit of the cables and the basic connector will still detect normal, but with the noise tester it will failed. My last installation of CAT 6 environment the contractor need to redo about 10 points.