Pourquoi traceroute -T ajoute-t-il des sauts et des astérisques intermédiaires ?

Voici traceroute sans aucune option :

$ traceroute google.com
traceroute to google.com (172.217.4.142), 30 hops max, 60 byte packets
 1  10.14.62.1 (10.14.62.1)  0.619 ms  0.685 ms  0.806 ms
 2  10.14.255.29 (10.14.255.29)  0.492 ms  0.508 ms  0.508 ms
 3  c2-dc-cs02_po81.microchip.com (10.10.255.54)  1.199 ms  1.210 ms  1.507 ms
 4  c2-dc-wr02_pc20.microchip.com (10.10.255.155)  0.489 ms  0.565 ms  0.565 ms
 5  c2-dc-cp02_int.microchip.com (10.10.202.62)  3.040 ms  3.394 ms  3.403 ms
 6  c2-dc-er01.microchip.com (198.175.253.66)  4.525 ms  4.141 ms  3.994 ms
 7  ge-10-2-9.mpr3.phx2.us.above.net (64.124.198.17)  5.893 ms  5.893 ms  5.089 ms
 8  ae28.cs1.lax112.us.eth.zayo.com (64.125.31.252)  12.306 ms  12.547 ms  12.220 ms
 9  * * *
10  64.125.13.109 (64.125.13.109)  12.742 ms  12.433 ms  12.782 ms
11  108.170.247.225 (108.170.247.225)  13.210 ms  12.447 ms  12.799 ms
12  72.14.239.121 (72.14.239.121)  13.587 ms 72.14.238.213 (72.14.238.213)  12.143 ms  12.546 ms
13  lax17s14-in-f14.1e100.net (172.217.4.142)  12.556 ms  10.660 ms  10.771 ms

Mais, si j'ajoute -T :

$ sudo traceroute -T google.com
traceroute to google.com (172.217.4.142), 30 hops max, 60 byte packets
 1  10.14.62.1 (10.14.62.1)  0.513 ms  0.660 ms  0.661 ms
 2  10.14.255.29 (10.14.255.29)  0.450 ms  0.449 ms  0.484 ms
 3  c2-dc-cs02_po81.microchip.com (10.10.255.54)  1.247 ms  1.246 ms  1.574 ms
 4  10.10.255.166 (10.10.255.166)  0.388 ms  0.424 ms  0.423 ms
 5  * * *
 6  * * *
 7  * * *
 8  * * *
 9  * * *
10  * * *
11  * * *
12  * * *
13  * * *
14  * * *
15  lax17s14-in-f142.1e100.net (172.217.4.142)  99.545 ms  99.616 ms  11.428 ms