How to compress twisted pair in RJ-45 correctly?

Question

Computer networks

1) I read on the Internet that there are two types of swaging - direct and crossover. At the same time, for a gigabit connection, you need to crimp it according to a special type - a gigabit crossover
2) From one question, how is it then crimped in ready-made Internet cables, they don’t know 100BASE-TX or 1000BASE-T will be with the buyer.
3) Why can't you just use straight crimp?

Answer 1

Previously, a straight cable version was needed to connect the MDI port (1-2 - Tx, 3-6 - Rx) of the terminal device with the MDIX port (1-2 - Rx, 3-6 - Tx) of the hub / switch, and the crossover cable was used to connect MDI-MDI of two terminal devices. For cascading hubs / switches, one of the ports on them was made either with two sockets (MDI and MDIX), of which only one was used, or with a switch.
Then auto-detection of the mode appeared, first on switches, then on end devices. Now it does not matter which option the cable is crimped, the ports themselves will coordinate the operating modes.
The Auto-MDI(X) mode was built into the 1000Base-T standard from the very beginning.

Answer 2

At the same time, for a gigabit connection, you need to crimp according to a special type - a gigabit crossover

There is no such concept. As were the T568A and T568B - they remained

Answer 3

For a hundred years I have been crimping only straight. No problem.
The exception is card-to-card-without-switch. It's more like a crossover cable.
The only thing, if both ends are inaccessible to you, is to make sure option A or B is accepted in this room so that there is no mess.
It is enough in 99% of cases to simply choose what you like best: T568A and T568B