网络出版 Network Publishing TCPP的工作方式 Host A Host b Port or service access point (SAP) TCP CrCP connection) TCP Global network IP Network Aceess Network Aceess Protocol #I Protocol #2 Physical Logical connection Phvsical Subnetwork attachment (eg… virtual cireuit) Router j Network 1 Network 2 NAP 1 NAP 2TCP/IP的工作方式