How can the correctness of data packet transmission be ensured in Linux?

In Linux, checksums are commonly used to verify the correctness of data packet transmission. They help detect errors that occur during network transmission.

Main methods:

• Protocol-level checksums: For example, IP, TCP, and UDP protocols include checksum fields in their headers, which are calculated by the sender and verified by the receiver.
• Using utilities: Tools like ping (checks availability and response integrity), traceroute, tcpdump, or wireshark can be used for diagnostics and to verify packet transmission and their checksums.
• Configuring network hardware and drivers: In some cases, hardware or network card drivers can perform checksum offloading.

Example: with tcpdump, you can filter packets and check checksum fields.

Thus, transmission correctness is ensured at the protocol level using checksums and can be additionally verified using system utilities.