perche il ping peggiora sotto linux ?

yari@linux:~> ping www.ngi.it
PING www.ngi.it (194.185.88.15) from 192.168.20.2 : 56(84) bytes of data.
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=1 ttl=119 time=59.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=2 ttl=119 time=58.7 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=3 ttl=119 time=56.5 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=4 ttl=119 time=54.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=5 ttl=119 time=52.1 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=6 ttl=119 time=49.9 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=7 ttl=119 time=47.7 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=8 ttl=119 time=57.5 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=9 ttl=119 time=55.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=10 ttl=119 time=53.0 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=11 ttl=119 time=50.8 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=12 ttl=119 time=48.6 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=13 ttl=119 time=58.4 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=14 ttl=119 time=56.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=15 ttl=119 time=54.0 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=16 ttl=119 time=51.8 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=17 ttl=119 time=49.6 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=18 ttl=119 time=47.4 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=19 ttl=119 time=57.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=20 ttl=119 time=55.0 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=21 ttl=119 time=52.8 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=22 ttl=119 time=50.5 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=23 ttl=119 time=60.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=24 ttl=119 time=58.1 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=25 ttl=119 time=55.9 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=26 ttl=119 time=53.7 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=27 ttl=119 time=51.5 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=28 ttl=119 time=49.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=29 ttl=119 time=59.1 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=30 ttl=119 time=56.9 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=31 ttl=119 time=54.7 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=32 ttl=119 time=52.5 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=33 ttl=119 time=62.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=34 ttl=119 time=60.1 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=35 ttl=119 time=57.9 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=36 ttl=119 time=55.7 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=37 ttl=119 time=53.4 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=38 ttl=119 time=51.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=39 ttl=119 time=61.0 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=40 ttl=119 time=58.8 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=41 ttl=119 time=56.5 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=42 ttl=119 time=54.4 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=43 ttl=119 time=52.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=44 ttl=119 time=50.0 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=45 ttl=119 time=59.8 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=46 ttl=119 time=57.6 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=47 ttl=119 time=55.5 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=48 ttl=119 time=53.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=49 ttl=119 time=51.0 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=50 ttl=119 time=60.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=51 ttl=119 time=46.6 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=52 ttl=119 time=56.4 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=53 ttl=119 time=54.1 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=54 ttl=119 time=51.9 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=55 ttl=119 time=49.7 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=56 ttl=119 time=47.5 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=57 ttl=119 time=57.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=58 ttl=119 time=55.1 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=59 ttl=119 time=52.9 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=60 ttl=119 time=49.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=61 ttl=119 time=48.4 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=62 ttl=119 time=58.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=63 ttl=119 time=56.1 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=64 ttl=119 time=53.9 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=65 ttl=119 time=51.7 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=66 ttl=119 time=49.5 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=67 ttl=119 time=57.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=68 ttl=119 time=79.0 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=69 ttl=119 time=50.8 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=70 ttl=119 time=48.6 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=71 ttl=119 time=58.4 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=72 ttl=119 time=56.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=73 ttl=119 time=54.0 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=74 ttl=119 time=51.8 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=75 ttl=119 time=49.6 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=76 ttl=119 time=59.4 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=77 ttl=119 time=57.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=78 ttl=119 time=55.0 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=79 ttl=119 time=52.8 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=80 ttl=119 time=50.6 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=81 ttl=119 time=60.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=82 ttl=119 time=58.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=83 ttl=119 time=56.0 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=84 ttl=119 time=53.8 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=85 ttl=119 time=51.6 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=86 ttl=119 time=49.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=87 ttl=119 time=59.1 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=88 ttl=119 time=56.9 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=89 ttl=119 time=54.7 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=90 ttl=119 time=52.5 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=91 ttl=119 time=50.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=92 ttl=119 time=60.1 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=93 ttl=119 time=57.9 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=94 ttl=119 time=55.7 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=95 ttl=119 time=53.4 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=96 ttl=119 time=51.3 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=97 ttl=119 time=49.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=98 ttl=119 time=58.8 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=99 ttl=119 time=56.6 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=100 ttl=119 time=54.4 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=101 ttl=119 time=52.2 ms
64 bytes from www.ngi.it (194.185.88.15): icmp_seq=102 ttl=119 time=50.0 ms