An HTTP packet captured in Wireshark contains essential information for analyzing web traffic. HTTP (Hypertext Transfer Protocol) is used for transferring web pages on the internet.
Structure of an HTTP Packet in Wireshark:
Ethernet Frame:
Destination MAC: The MAC address of the receiving device.
Source MAC: The MAC address of the sending device.
EtherType: Indicates the protocol used, typically IPv4 (0x0800).
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Version: IP version (usually IPv4).
Header Length: Length of the IP header.
Source IP: IP address of the sender.
Destination IP: IP address of the receiver.
Protocol: Indicates the encapsulated protocol, TCP (0x06).
TCP Segment:
Source Port: Port of the sending application.
Destination Port: Port of the receiving application, typically 80 (HTTP) or 443 (HTTPS).
Sequence Number: Position of the first data byte.
Acknowledgment Number: Next byte expected by the sender.
Flags: Control flags (e.g., SYN, ACK).
HTTP Message:
Request Line (for HTTP Requests): Method (e.g., GET, POST), URL, HTTP version.
Status Line (for HTTP Responses): HTTP version, status code (e.g., 200 OK), status text.
Headers: Key-value pairs (e.g., Host, User-Agent).
Body: Optional, contains data for POST requests or response content.
In Wireshark, these components are displayed in a hierarchical, expandable format, making it easier to inspect and diagnose issues within each layer of the network communication.
