Lab 3 solution PDF

Title	Lab 3 solution
Course	Computer Networks and Applications
Institution	University of New South Wales
Pages	11
File Size	301.8 KB
File Type	PDF
Total Downloads	96
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lab3 solution...

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COMP3331/9331 Computer Networks and Applications

Lab 3 solutions Exercise 1 Here is a short summary. A = Internet address of the host; hostname to IP address mapping. CNAME = canonical name of an alias; a machine may have several names (aliases) associated with it, but only one of them is the "real" one. MX = mail exchanger; mail server for the domain. This is used by SMTP. NS = nameserver; which nameserver is responsible for the domain. PTR = pointer to a canonical name; IP address to hostname mapping. SOA = domain's start-of-authority information; who is in charge for the administration of the domain. AAAA = IPv6 address of the host (A is for IPv4 address)

Exercise 2 Question 1 The IP address of www.cecs.anu.edu.au is 150.203.161.98. To get this answer we make a type A query. -bash-4.2$ dig www.cecs.anu.edu.au ; DiG 9.7.3 www.cecs.anu.edu.au ;; global options: +cmd ;; Got answer: ;; ->>HEADERHEADERHEADERHEADERHEADERHEADERHEADERHEADERHEADERHEADERHEADERHEADER...