Різні відповіді на запит DNS

Чи може хтось допомогти мені зрозуміти, що тут відбувається?

host : static-akamai.gtm.acer.com

dig static-akamai.gtm.acer.com : answer with question and authority section, no answer section

dig +trace static-akamai.gtm.acer.com  : CNAME static.acer.com.edgesuite.net

dig @gtm1.acer.com static-akamai.gtm.acer.com : CNAME static.acer.com.edgesuite.net

Зокрема рядок №2:

dig static-akamai.gtm.acer.com : answer with question and authority section, no answer section

тепер з висновком копати:

# dig static-akamai.gtm.acer.com

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.6 <<>> static-akamai.gtm.acer.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 22716
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;static-akamai.gtm.acer.com.    IN      A

;; AUTHORITY SECTION:
gtm.acer.com.           48      IN      SOA     gtm1.acer.com. hostmaster.gtm1.acer.com. 572 10800 3600 604800 60

;; Query time: 0 msec
;; SERVER: 10.16.2.225#53(10.16.2.225)
;; WHEN: Fri Sep 18 18:36:35 2015
;; MSG SIZE  rcvd: 96

# dig +trace static-akamai.gtm.acer.com

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.6 <<>> +trace static-akamai.gtm.acer.com
;; global options:  printcmd
.                       504486  IN      NS      d.root-servers.net.
.                       504486  IN      NS      e.root-servers.net.
.                       504486  IN      NS      f.root-servers.net.
.                       504486  IN      NS      g.root-servers.net.
.                       504486  IN      NS      h.root-servers.net.
.                       504486  IN      NS      i.root-servers.net.
.                       504486  IN      NS      j.root-servers.net.
.                       504486  IN      NS      k.root-servers.net.
.                       504486  IN      NS      l.root-servers.net.
.                       504486  IN      NS      m.root-servers.net.
.                       504486  IN      NS      a.root-servers.net.
.                       504486  IN      NS      b.root-servers.net.
.                       504486  IN      NS      c.root-servers.net.
;; Received 496 bytes from 10.16.2.225#53(10.16.2.225) in 0 ms

com.                    172800  IN      NS      m.gtld-servers.net.
com.                    172800  IN      NS      g.gtld-servers.net.
com.                    172800  IN      NS      j.gtld-servers.net.
com.                    172800  IN      NS      b.gtld-servers.net.
com.                    172800  IN      NS      k.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      i.gtld-servers.net.
com.                    172800  IN      NS      f.gtld-servers.net.
com.                    172800  IN      NS      l.gtld-servers.net.
com.                    172800  IN      NS      h.gtld-servers.net.
com.                    172800  IN      NS      a.gtld-servers.net.
;; Received 504 bytes from 199.7.91.13#53(d.root-servers.net) in 114 ms

acer.com.               172800  IN      NS      ns1.acer.com.
acer.com.               172800  IN      NS      ns2.acer.com.
acer.com.               172800  IN      NS      ns3.acer.com.
acer.com.               172800  IN      NS      ns4.acer.com.
acer.com.               172800  IN      NS      ns5.acer.com.
acer.com.               172800  IN      NS      ns6.acer.com.
;; Received 248 bytes from 192.55.83.30#53(m.gtld-servers.net) in 289 ms

gtm.acer.com.           300     IN      NS      gtm3.acer.com.
gtm.acer.com.           300     IN      NS      gtm2.acer.com.
gtm.acer.com.           300     IN      NS      gtm1.acer.com.
;; Received 165 bytes from 193.0.238.131#53(ns1.acer.com) in 50 ms

static-akamai.gtm.acer.com. 30  IN      CNAME   static.acer.com.edgesuite.net.
;; Received 87 bytes from 199.107.120.136#53(gtm3.acer.com) in 148 ms

# dig @gtm1.acer.com. static-akamai.gtm.acer.com

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.6 <<>> @gtm1.acer.com. static-akamai.gtm.acer.com
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5946
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;static-akamai.gtm.acer.com.    IN      A

;; ANSWER SECTION:
static-akamai.gtm.acer.com. 30  IN      CNAME   static.acer.com.edgesuite.net.

;; Query time: 52 msec
;; SERVER: 193.0.238.134#53(193.0.238.134)
;; WHEN: Fri Sep 18 18:37:53 2015
;; MSG SIZE  rcvd: 87