Embedded checksums cover TCP, UDP, and ICMP and are calculated where?

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Multiple Choice

Embedded checksums cover TCP, UDP, and ICMP and are calculated where?

Explanation:
The idea being tested is that the checksums for TCP, UDP, and ICMP are computed by the sender and embedded in the packet headers. These checksums cover the respective protocol data (and, for TCP/UDP, include a pseudo-header with IP source and destination, protocol, and length) to ensure integrity as the packet travels across networks. The receiving end re-computes the checksum to verify the data, but the calculation itself happens at the source before transmission. That’s why the correct interpretation is that embedded checksums are calculated at the source.

The idea being tested is that the checksums for TCP, UDP, and ICMP are computed by the sender and embedded in the packet headers. These checksums cover the respective protocol data (and, for TCP/UDP, include a pseudo-header with IP source and destination, protocol, and length) to ensure integrity as the packet travels across networks. The receiving end re-computes the checksum to verify the data, but the calculation itself happens at the source before transmission. That’s why the correct interpretation is that embedded checksums are calculated at the source.

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