Wireshark Lab: DNS
Version: 2.
0
© 2007 J.
F.
Kurose, K.
W.
Ross.
All Rights Reserved
Computer Networking: A Topdown Approach, 4
th
edition.
As described in Section 2.
5 of the textbook, the Domain Name System (DNS) translates
hostnames to IP addresses,...
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Wireshark Lab: DNS
Version: 2.
0
© 2007 J.
F.
Kurose, K.
W.
Ross.
All Rights Reserved
Computer Networking: A Topdown Approach, 4
th
edition.
As described in Section 2.
5 of the textbook, the Domain Name System (DNS) translates
hostnames to IP addresses, fulfilling a critical role in the Internet infrastructure.
In this
lab, we’ll take a closer look at the client side of DNS.
Recall that the client’s role in the
DNS is relatively simple – a client sends a query to its local DNS server, and receives a
response back.
As shown in Figures 2.
21 and 2.
22 in the textbook, much can go on
“under the covers,” invisible to the DNS clients, as the hierarchical DNS servers
communicate with each other to either recursively or iteratively resolve the client’s DNS
query.
From the DNS client’s standpoint, however, the protocol is quite simple – a query
is formulated to the local DNS server and a response is received from that server.
Before beginning this lab, you’ll probably want to review D
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