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Training Camp • Cybersecurity Glossary
Path Maximum Transmission Unit Discovery (PMTUD) is a process used to determine the maximum packet size that can be transmitted without fragmentation along a path in a network.
PMTUD Definition: Path Maximum Transmission Unit Discovery (PMTUD) is a process used to determine the maximum packet size that can be transmitted without fragmentation along a path in a network.
Path MTU Discovery (PMTUD) is a technique used in networking to determine the maximum size of IP packets that can be transmitted without fragmentation across a path. It involves sending packets with the "Don't Fragment" flag set and relies on receiving ICMP messages if a packet exceeds the maximum size along the path, allowing the sender to adjust the packet size accordingly.
PMTUD is one of the topics you'll master in the Cisco CCNA Boot Camp.
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