The expression field serves as a tool to filter packets containing a specific string within the actual payload data. To illustrate, please refer to Figure 1 and Figure 2.
In Figure 1, the Expression field contains the term "http." Packet Search will then exclusively filter packets that have the term "http" present within their payload data. Moving on to Figure 2, you'll find an example of a search results page displaying the word "http" encircled in an orange hue.
Figure 1: Packet Search Expression http
Figure 2: Search Result Packet Infor
