The NetworkMessage flags used with the discovery request messages shall use the following bit values.

• UADPFlags bits 5 and 6 shall be false, bits 4 and 7 shall be true
• ExtendedFlags1 bits 3, 5 and 6 shall be false, bits 4 and 7 shall be true
• ExtendedFlags2 bit 2 shall be true, all other bits shall be false

The setting of the flags ensures a known value for the first five fields in the NetworkMessage on the Publisher as receiver. The actual security settings for the NetworkMessage are indicated by the SecurityHeader.