This holds up to 64 initial bytes of a PDU that triggered the notification. This notification-only object gives the admin an actual byte-level snippet of the problematic PDU, capturing enough of the header to inspect the PDU type and key fields directly from the trap payload rather than needing a packet capture running at the exact moment the problem occurred. For example, for a malformed-PDU notification, having these 64 header bytes embedded directly in the trap lets the admin identify a garbled or unexpected field value without having had a packet sniffer running at that exact moment.