Domain Name System (DNS) Doctoring JN0-637 Practice Questions (Page 4)

Questions 16–18

1. 16foundation · easy

   When configuring DNS doctoring on a Junos device, where must the DNS doctoring statement be placed?

   • AUnder the 'interfaces' hierarchy of the device
   • BUnder the 'match' clause of a destination NAT rule
   • CUnder the 'then' clause of a destination NAT rule
   • DUnder the 'from' clause of a security policy
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   An administrator is configuring DNS doctoring on an SRX device. After adding the 'dns-doctoring' statement to the destination NAT rule, what additional step is required to ensure the configuration takes effect?

   • ARestart the DNS service on the SRX.
   • BClear the DNS cache on the SRX.
   • CReboot the SRX device.
   • DCommit the configuration.
   Reveal Solution Discussion Select an answer first
3. 18application · medium

   A company has a destination NAT rule that maps 203.0.113.20 to 10.0.0.5 for a mail server. DNS doctoring is enabled on this rule. An internal client queries the DNS server and receives a response containing 10.0.0.5. What is the most likely reason the client received the private address instead of the public address?

   • AThe destination NAT rule is not matching the DNS server's traffic.
   • BThe client is using a public DNS resolver instead of the internal DNS server.
   • CThe DNS server is configured with a split-horizon zone for internal queries.
   • DThe DNS response was rewritten by DNS doctoring because the client is on the internal network.
   Reveal Solution Discussion Select an answer first