Please see if my answers are correct for the following: 1. Provide examples for

Question

Please see if my answers are correct for the following:

1. Provide examples for Root DNS server, Top Level Domain server, and default name server.

My answers to #1 respectively: VeriSign, Inc., a.gtld-servers.net., and dns.auburn.edu

2. Provide examples for:

(a) Authoritative Domain Name Servers – Primary and Secondary.

(b) Master Name Server

(c) Slave Name Server

My answer to #2 a) Primary--dns-sa1.powerdns.net and Secondary--dns-sa2.powerdns.net

b and c, respectively,

For this question, I am supposed to describe the meaning of the RRs. Did I describe them correctly?

(abc.com, 123.45.67.89, A , 9hours)

This RR is in the format (name, [pref.], value, type, [TTL]). Also, it is a type A RR. Therefore, the name is abc.com, the value is the IP address 123.45.67.89, the type is A which indicates a hostname-to-IP address mapping, and the TTL (Time-To-Live, or lifetime of the cached RR) is 9 hours.

(xyz.net, 89.67.45.123, MX)

This is another RR with the same format as part (a) without the TTL. The RR type is a mail exchange (MX), the name of the RR is xyz.net and the value is the IP address 89.67.45.123.

Explanation / Answer

Hi,

I reviewed your answers and here is my take on them.

Question 1. Provide examples for Root DNS server, Top Level Domain server, and default name server.

Root DNS server example:a.root-servers.net

Root Server name   Managed by

Top level Domain Server:

In your example a.gtld-servers.net,.net is the top level Domain server  name.Another example is google.com,here .com is the example for top level doamin name.

Default name server:   

your example dns.auburn.edu is right.Some other Default name servers list:

dns1.registrar-servers.com
       dns2.registrar-servers.com
       dns3.registrar-servers.com
       dns4.registrar-servers.com
       dns5.registrar-servers.com

Question 2. Provide examples for:

(a) Authoritative Domain Name Servers – Primary and Secondary.

(b) Master Name Server

(c) Slave Name Server

Answer:Authoritative Domain Name server:

Primary--dns-sa1.powerdns.net and Secondary--dns-sa2.powerdns.net.Your answer is right

Master name server and slave name server:

(abc.com, 123.45.67.89, A , 9hours)

This RR is in the format (name, [pref.], value, type, [TTL]). Also, it is a type A RR. Therefore, the name is abc.com, the value is the IP address 123.45.67.89, the type is A which indicates a hostname-to-IP address mapping, and the TTL (Time-To-Live, or lifetime of the cached RR) is 9 hours.

(xyz.net, 89.67.45.123, MX)

This is another RR with the same format as part (a) without the TTL. The RR type is a mail exchange (MX), the name of the RR is xyz.net and the value is the IP address 89.67.45.123.

Your answer is right.

I hope that helps.HAPPY AWSWERING!!!!!!

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