How to correctly interpret network speed?

Question

Computer networks

I was puzzled by the speed that I was given on Hetzner, the iperf3 utility issued :
this is in Germany

[email protected]******-GER:~# iperf3 -c speedtest.hostkey.ru
Connecting to host speedtest.hostkey.ru, port 5201
[  4] local my-IP  port 21295 connected to 31.192.104.200 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  77.6 MBytes   650 Mbits/sec   56   6.34 MBytes
[  4]   1.00-2.00   sec   111 MBytes   933 Mbits/sec    0   6.35 MBytes
[  4]   2.00-3.00   sec   112 MBytes   944 Mbits/sec    0   6.37 MBytes
[  4]   3.00-4.00   sec   112 MBytes   944 Mbits/sec    0   6.38 MBytes
[  4]   4.00-5.00   sec   111 MBytes   933 Mbits/sec    0   6.39 MBytes
[  4]   5.00-6.00   sec   112 MBytes   944 Mbits/sec    0   6.43 MBytes
[  4]   6.00-7.00   sec   111 MBytes   933 Mbits/sec    0   6.48 MBytes
[  4]   7.00-8.00   sec   112 MBytes   944 Mbits/sec   15   6.49 MBytes
[  4]   8.00-9.00   sec   112 MBytes   944 Mbits/sec    0   6.49 MBytes
[  4]   9.00-10.00  sec   112 MBytes   944 Mbits/sec    0   6.49 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec  1.06 GBytes   911 Mbits/sec   71             sender
[  4]   0.00-10.00  sec  1.06 GBytes   911 Mbits/sec                  receiver

And this is the output of the test vps from mail.ru (shit something else ....)

[email protected]:~# iperf3 -c speedtest.hostkey.ru
Connecting to host speedtest.hostkey.ru, port 5201
[  4] local 89.208.229.134 port 56582 connected to 31.192.104.200 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec   110 MBytes   918 Mbits/sec    0   3.90 MBytes
[  4]   1.00-2.00   sec   112 MBytes   944 Mbits/sec    0   3.90 MBytes
[  4]   2.00-3.00   sec   112 MBytes   944 Mbits/sec    0   3.90 MBytes
[  4]   3.00-4.00   sec   112 MBytes   944 Mbits/sec    2   3.90 MBytes
[  4]   4.00-5.00   sec   111 MBytes   933 Mbits/sec    0   3.90 MBytes
[  4]   5.00-6.00   sec   112 MBytes   944 Mbits/sec    0   3.90 MBytes
[  4]   6.00-7.00   sec   112 MBytes   944 Mbits/sec    0   3.90 MBytes
[  4]   7.00-8.00   sec   112 MBytes   944 Mbits/sec    0   3.90 MBytes
[  4]   8.00-9.00   sec   112 MBytes   944 Mbits/sec    0   3.90 MBytes
[  4]   9.00-10.00  sec   111 MBytes   933 Mbits/sec    0   3.90 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec  1.09 GBytes   939 Mbits/sec    2             sender
[  4]   0.00-10.00  sec  1.09 GBytes   939 Mbits/sec                  receiver

It seems that the speed is really 4 and 7 mb / s ......
because before backups just downloaded in seconds, now it takes minutes

Answer 1

How to correctly interpret network speed?

Like the fact that from your hosts to the speedtest.hostkey.ru server, the average speed is around 940 Mbps.
To other hosts, the speed can be drastically different

Answer 2

Judging by the results on both servers, about 1 Gb / s actual speed

Answer 3

The tariffs indicate the port speed / speed "DO", no one is obliged to allocate gigabit for you, and the speed does not depend on the hoster