N - Multilateral Planners Conference

UNCLASSIFIEDACP 200(B) Vol 1215. IP provides the connectivity needed by user applications and network services, whileleaving all other details for definition by whatever lower-level technology is used to realizeconnectivity services in a particular situation. IP is a very minimal protocol and, essentially, itonly has two features—the source and destination end-node addresses carried in the datagram,and the best-effort delivery service.COMMUNICATIONS ARCHITECTURE216. The second systems view (Figure 2–4) provides a physical and link view of systemcomponents and their interfaces within a MTWAN and also between a MTWAN and externalcomponents. In this systems view, the MTWAN is broken up into three segments: shore,space, and deployed.217. Tier 1 (intra platform and handheld radios): This tier includes shipboard LANs(wired and wireless) and handheld radios. As they are internal to the deployed units they arenot actually depicted in the SV-1.2.218. Tier 2 (wireless networking): Tier 2 is networked LOS and BLOS communicationsbetween platforms and expeditionary forces ashore.219. Tier 3 (wireless trunking): This involves trunked LOS and BLOS communicationlinks, which provide point-to-point connectivity, such as HF BLOS and Digital WidebandTransmission System (DWTS).220. Tier 4 (satellite communications): This involves military and commercialgeosynchronous satellites, such as UFO, SKYNET, GBS/TBS, DSCS, CWSP, IRIDIUM andINMARSAT.221. A more detailed explanation of the tier system is provided in Chapter 16(Communication Subnets).Uncontrolled copy when printed2-6UNCLASSIFIEDOriginal