March 2018
Intermediate to advanced
626 pages
17h 32m
English
book
Network Analysis Using Wireshark 2 Cookbook - Second Edition
by Nagendra Kumar Nainar, Yoram Orzach, Yogesh Ramdoss
Content preview from Network Analysis Using Wireshark 2 Cookbook - Second Edition
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When a process on the end device is looking for the IP address of a specific name, it interacts with the local resolver that goes out to the DNS servers. When the DNS server does not find the entry you are looking for in its database, it can respond in two ways; recursive or iterative:
- Recursive mode: In this mode, when the application (for example, a web browser) wants to resolve the name of a website, www.packtpub.com, it sends a DNS request to the local DNS server (marked as 1 in the following diagram). The local DNS server sends the request to a root server (marked as 2 and 3 in the following diagram), then to the TLD (marked as 3 and 4 in the following diagram), and finally to the authoritative server of www.packtpub.com ...
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