Question

1) Is this DNS message a query or response?

IP, UDP and DNS 1... ....... Please check the screenshot below and give a short answer for the following questions. > Internet Protocol Version 4, Src: 168.26.188.11, Dst: 168.27.170.110 > User Datagram Protocol, Src Port: 53, Dst Port: 55706 Domain Name System (response) [Request Tn: 2101 [Time: 0.037798008 seconds) Transaction ID: @xa67e Flags: 8x8180 Standard query response, No error ......... Response: Message is a response .000 e... ..... Opcode: Standard query() ..... Authoritative: Server is not an authority for domain ..... Truncated: Message is not truncated ........... - Recursion desired: Do query recursively • Recursion available: Server can do recursive queries - Z: reserved (0) - Answer authenticated: Answer/authority portion was not authenticated by the server .... - Non-authenticated data: Unacceptable ............ 8888 - Reply code: No error (Ⓡ) Questions: 1 Answer RRS: 3 Authority RRS: 4 Additional RRS: 4 Queries > www.cnn.com: type A, class IN Answers > www.cnn.com: type CNAME, class IN, chame turner.map.fastly.net > turner.map.fastly.net: type CNAME, class IN, cname prod. turner.map.fastlylb.net > prod. turner.map.fastlylb.net: type A, class IN, addr 151.101.56.73 Authoritative nameservers > fastlylb.net: type Ns, class IN, ns ns3.fastlylb.net > fastlylb.net: type NS, class IN, ns ns1.fastlylb.net > fastlylb.net: type NS, class IN, ns ns2.fastlylb.net > fastlylb.net: type Ns, class IN, ns ns4.fastlylb.net Additional records > ns1.fastlylb.net: type A, class IN, addr 23.235.32.32 > ns2.fastlylb.net: type A, class IN, addr 104.156.80.32 > ns3.fastlylb.net: type A, class IN, addr 23.235.36.32 > ns4.fastlylb.net: type A, class IN, addr 104.156.84.32

2) What is the port number used to send the DNS query?

3) How many Answer RRs? (2 point) Please describe what they are?

Answer 1

Q1) The DNS message is the Response Message

Q2) The port Number used to Send Query is Port 53 as the connection is using UDP protocol ( Given as src port in screenshot )

Q3)

The Number of Answer RRs = 3

RRs are Resource Record i.e a File which reflects vital information for the associated DNS Domain Zone.It is used to describe the characteristics of a zone . Answers RR basically tells the number of matches that are found for the host name given in DNS query

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