cat 7 cert may not exist for ethernet, i think cat6a is max then it jumps to another cat.
Cat5(a) 100Mb/s up to 100meters.
Cat5e 1Gb/s up to 100 meters, 10Gb/s in a few meters
cat6 10Gb/s up to 50meters
cat6a 10Gb/s up to 100meters
What differentiates these cables are the frequency you can run them at. When you use them for other things, for POE the cable gauge matters especially for conductors too. For data like video that uses 2 ethernet cables, it can matter as literally the signals are just passed through the conductor as theres no translation.
You then have to worry about solid core and clad. Solid core doesnt take well to being bend about but is better at POE and good for doing internal building installs where the cable is going to be a part of the building. clad is much lighter, cheaper and has no difference in signal, only the actual cable is weaker but better at everyday use rather than having to deal with the weather, dirt or building stresses when added into walls. Solid core also is easier to install since it doesnt like to bend making it easier to snake cables.
You then have grounded and ungrounded. you need grounded if theres a lot of interference, ungrounded if there isnt. These are typically called shielded and unshielded. You'll also want twisted pairs as well. So here you have STP or UTP. shielded cables are a bigger pain to installed but are usually done if there may be a need like in being a part of the building where you have power cables or in factories or high powered wireless as an example and cost a lot more.
I managed to get a 100m roll of cat6 at less than rm1 per meter, and a bunch of ethernet heads at 30 cents per head, toolset to do cable install costs like rm 30, and if you want you can use a patch panel which should cost less than rm100 for 24 lanes (48 ports) if you intend to do permanent cabling along side quad faceplates (they cost a few rm each for the faceplate and termination jacks). Source the items yourself from lazada/lelong and you'll be surprised at how cheap they actually are and learning to do it yourself as well. Contractors will charge thousands for what takes only hundreds to do. When using a faceplate, always use a quad faceplate as ethernet is very useful, it goes alongside better central cabling for better performance, and if you need to use it for other things. You can also use a rj45 to rj11 cable for using with phones too.
In this day and age, i suggest cat6 at least unless you plan on using 1Gb/s or lower quality video passthroughs for a decade or more. I've listed some accurate/estimated costs for the items so you dont get scammed when doing your project.
QUOTE(prokiller1199 @ May 13 2018, 12:41 AM)
Why u are so rich.... So many asus routers omg
he only test, doesnt own them

I myself actually own 3 asus routers, 1 my past employer stole, however my main router is a 36 core cpu router with 10Gb/s ports which i combine with a 10Gb/s 16 port managed switch and a managed many port standard Gbe switch with 2 10Gb/s ports