participants. See messaging participants
peer-to-peer message topology, 71
channels and channel shape, 164, 166
performance, 15
load balancing, 54
XML transport, 29
Plain Old XML (POX) messages, 102
platform independence, 56
point-to-point message topology, 69
postmarks, 24
POX messages, 102
PrefixEndpointAddressMessageFilter type, 266
ProtectionLevel property
MessageBodyMemberAttribute type, 249
MessageContractAttribute type, 249
MessageHeaderAttribute type, 249
OperationContractAttribute type, 242
ServiceContractAttribute type, 240
ProtectionLevel type, 240
protocol channels, 175
proxies. See clients
pull model, defined, 131
push model, defined, 131