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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TCP selective acknowledgement option
TCP SACK is a TCP option that will be included in the SYN and SYN/ACK segments. When the TCP endpoints are enabled with TCP SACK feature, the endpoint signal the capability to peer by including the same in SYN packet.
As seen in the preceding example, TCP SACK option will be seen in SYN and SYN/ACK segments. If this TCP option is not seen in the capture, ensure that the feature is enabled on the TCP endpoints. Depending on the vendor and platform, this feature may be enabled by default.
When the receiver ...
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