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15. You have just graduated from PUPR and have started your new online catering

ID: 3878063 • Letter: 1

Question

15. You have just graduated from PUPR and have started your new online catering company. You have set up your own web server (hostname: mofongo.com, IP: 123.231.098.56) and your own authoritative DNS server (hostname: ns 1.mofongo.com, IP: 123.231.098.20). You must ensure that various types of information are inserted into the DNS system so that users worldwide are able to browse your website. Disregard the time to live metric. a. Which DNS record(s) must your ISP insert into the .com TLD servers? (6 points) NAME VALUE TYPE b. Which DNS record(s) must be inserted into your authoritative DNS server? (3 points) NAME VALUE TYPE c. Now suppose that you wish to be able to receive e-mail at addresses such as info@mofongo.com. You decide to run your mail server, mail.mofongo.com, on a different machine with IP address 123.231.098.95. What additional record(s) must be added to your authoritative DNS server? (6 points) NAME VALUE TYPE

Explanation / Answer

(a)

NAME VALUE TYPE

mofongo.com 123.231.098.56 A

(b)

ns1.mofongo.com 123.231.098.20 NS

(c)

info@mofongo.com 123.231.098.95 MX

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