Pessoalmente adoro a dig
sites que conheço. Aqui está uma coisa estranha que eu vi no meu terminal depois de executar dig www-contestwinners.com
: -
; <<>> DiG 9.9.5-3ubuntu0.1-Ubuntu <<>> www-contestwinners.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27237
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www-contestwinners.com. IN A
;; ANSWER SECTION:
www-contestwinners.com. 300 IN A 8.29.143.192
;; Query time: 40 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Sun Jun 06 20:31:40 IST 2015
;; MSG SIZE rcvd: 67
O que é um absurdo, pois o meu ISP está a cerca de 200kms de distância e eu estou em uma conexão DSL. Considerando os pacotes viajam na velocidade da luz, o que torna o tempo para chegar ao pacote do meu dispositivo para o servidor ISP de cerca de 0,6 ms, que não é muito, mas o servidor do site está em EUA, que está a uma distância de 13000 km do meu ISP que faz o tempo para chegar ao servidor cerca de 43 ms. Assim, a viagem total de ida e volta demora cerca de (43 + 0,6) x2 = 87,2 ms.
Estou totalmente confuso / animado. Acho que acabei de quebrar uma lei básica da física: p
EDIT: Eu verifiquei dig www-contestwinners.com +trace
para verificar o cache e recebi: -
;; global options: +cmd
. 412410 IN NS i.root-servers.net.
. 412410 IN NS k.root-servers.net.
. 412410 IN NS f.root-servers.net.
. 412410 IN NS g.root-servers.net.
. 412410 IN NS e.root-servers.net.
. 412410 IN NS l.root-servers.net.
. 412410 IN NS h.root-servers.net.
. 412410 IN NS b.root-servers.net.
. 412410 IN NS a.root-servers.net.
. 412410 IN NS m.root-servers.net.
. 412410 IN NS j.root-servers.net.
. 412410 IN NS c.root-servers.net.
. 412410 IN NS d.root-servers.net.
. 518400 IN RRSIG NS 8 0 518400 20150618050000 20150608040000 48613 . TJF2HD0Ob5niqlCZNhlOYHvwlZmEpebgV8uFwgvRLBCQb22sq+S8Hr4d CX9S5WgzRlTxCSQ3Bi9TJNlyf221rE1K53kFbRae6/vzjR2MukvF5d8G SEWinOcJ9n7l6fTq/HoxCv/GfliY6gTPWxrc8uiABdYYOj3u3XoUmbF7 Cug=
;; Received 397 bytes from 127.0.1.1#53(127.0.1.1) in 5306 ms
com. 172800 IN NS a.gtld-servers.net.
com. 172800 IN NS b.gtld-servers.net.
com. 172800 IN NS c.gtld-servers.net.
com. 172800 IN NS d.gtld-servers.net.
com. 172800 IN NS e.gtld-servers.net.
com. 172800 IN NS f.gtld-servers.net.
com. 172800 IN NS g.gtld-servers.net.
com. 172800 IN NS h.gtld-servers.net.
com. 172800 IN NS i.gtld-servers.net.
com. 172800 IN NS j.gtld-servers.net.
com. 172800 IN NS k.gtld-servers.net.
com. 172800 IN NS l.gtld-servers.net.
com. 172800 IN NS m.gtld-servers.net.
com. 86400 IN DS 30909 8 2 E2D3C916F6DEEAC73294E8268FB5885044A833FC5459588F4A9184CF C41A5766
com. 86400 IN RRSIG DS 8 1 86400 20150618050000 20150608040000 48613 . kSsNvyvdzfiJAxfpaRq4+bAe2JuKcDTcRnHDgGhiHNRsbcg04fHv/TNt Kkl0LuBpLcBWhBr74OkCLJxx5Q1KFkRhum2R7gHj6h5u8s4J84feqWeu fx69Defg2NWhToWDnqz0WzlUKF0nDsEyXTJDjsUeFrXu+baR3NSMLxvb zdU=
;; Received 746 bytes from 192.203.230.10#53(e.root-servers.net) in 5221 ms
www-contestwinners.com. 172800 IN NS dan.ns.cloudflare.com.
www-contestwinners.com. 172800 IN NS anna.ns.cloudflare.com.
CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 86400 IN NSEC3 1 1 0 - CK0QFMDQRCSRU0651QLVA1JQB21IF7UR NS SOA RRSIG DNSKEY NSEC3PARAM
CK0POJMG874LJREF7EFN8430QVIT8BSM.com. 86400 IN RRSIG NSEC3 8 2 86400 20150613045314 20150606034314 33878 com. syTPVIWKgitzBOsgVgzOl7nEIsu7jhsmSXPzzLuGVUwZZC1QHc4dxmKP MkZUR+VcaY657/Knjk7Il5oOKWo8ZlTatk3+34504gWwdnbB3BShqTKS CFsWOEdw5wyf0gumuQk5GKnVR5Noo+q2+ZOxxy7LkEl0F/h7fuYj7sJA VkM=
A7FUA6LKSQCDHL6JDO7SFU649KJ6FAU5.com. 86400 IN NSEC3 1 1 0 - A7G276R35K72HBA9TE7NSAOEFTS5CADU NS DS RRSIG
A7FUA6LKSQCDHL6JDO7SFU649KJ6FAU5.com. 86400 IN RRSIG NSEC3 8 2 86400 20150614050705 20150607035705 33878 com. lIZrvjQdR4oNJTo8gW1uuzs1IuFXiqwZbI757xxBRdrYl22IDSDM4U4G i8PNVSOQ2T3ub++0VhoioWnp3aD+Uc1XmdR/jI5Z5bosIsfIrCj+CSCm ZlDShTEDsfOBLxvZ2LByGwibTHi/yuH57O+Zx3zp21RZu3xLAn2WT2aZ TrE=
;; Received 675 bytes from 192.12.94.30#53(e.gtld-servers.net) in 1539 ms
www-contestwinners.com. 300 IN A 8.29.143.192
;; Received 67 bytes from 173.245.59.108#53(dan.ns.cloudflare.com) in 53 ms
Como isso é possível?