Is the Internet speed slowing down due to multiple connections?

Question

Computer networks

Consider the following situation: 1 - the cable from the provider is pulled into the apartment and plugged directly into the PC. 2 - the cable from the provider is pulled into the apartment, then it is plugged into the rj socket, this socket goes into the room, then the PC is connected from this socket with another cable. The question is, in which case will the Internet speed be faster? Does the number of connections affect the speed of the Internet, provided that the total length of all connections does not exceed 100 meters?

Answer 1

You won't notice the difference.

Answer 2

A hundred-megabit link is quite difficult to disturb with such trifles. Well, this will manifest itself if the contact in the sockets is not at all ok, not in a decrease in speed, but in a periodic loss of communication, rather, or switching to something like 10Mbps half-duplex, etc.

Answer 3

If crooked Chinese sockets, if the wire is copper, if it is crimped crookedly, there may be problems. But not in understating the speed, but in the loss of communication in general. I had such a case - I crimp the patch cord, I crimp it correctly - there is no link! I recompress - there is no link! The wire was noisy...

Answer 4

Anything can affect the signal quality. Packets can start to be lost already at a cable length of 90m, and it may be that even at 120m everything will "fly". Those. if the pochcord is shitty, then a 1m cable will not work))
You do not need to consider the problem from this angle, but test it better at least with the ping program.
Ping:
ping mail.ru -t
the delay should be uniform, i.e. without big disconnects,
wait 2-3 minutes and press Ctrl+C look at the report, packets should not disappear!
try increasing the packet size:
ping mail.ru -l 1024 -t
repeat..
Some NICs can test the link, i.e. show the length of each wire in the cable, and also show drop packets, in short, specific terms will go there, so I'll stop there.
Test.