How many cable connections (sockets, couplings) can be made?

Question

Iron

Interested in how much the quality of communication reduces the presence of connections in the cable via jacks to an rj-45 socket? How is it measured? For example, a gigabit cable from the provider enters the apartment, and then it has several connections through the rj45 jack-in-socket on the way to the router. It is ideal that the cable from the provider comes directly to the router. The question is, how much will the quality / speed of the connection decrease in the above example? How/what method can this be confirmed/verified?

Answer 1

icmp packet loss\ latency\ jitter!