Sequence Number Seq

Network 2 octets ICMP echo message unverified

Increments per request. Echo messages only.

Reading a capture

The number ping prints as icmp_seq, and a gap in it is a dropped packet. Unrelated to the Sequence Number in the 802.11 header, which counts frames on the air.

Where it sits

ICMP Message > Sequence Number

Open in the explorer — ICMP echo over IPv4, in a QoS Data frame

Accuracy

Clause: RFC 792
Byte order: big-endian — network byte order
Verified: Not verified against the standard. Treat this as a claim, not a fact.