3 - CLNP - Connectionless Network Protocol / ISO 8473
CLNP PCI
Protocol ID (1 byte)
Length Indicator (1 byte) (ISO 8473)
Version (1 byte)
PDU Lifetime (1 byte)
Flags (3 bits)
Type (5 bits)
Segment Length (2 bytes)
Checksum (2 bytes)
Destination Address Length (1 byte)
Destination Address (n bytes)
Source Address Length (1 byte)
Source Address (n bytes)