Chapter 3 Network Architetures and standarts Network architecture features May or may not conform to standards Dont provides enough detail how network to be implemented Provides a set of generic concepts Most architecture(plan) are designed for the long term use network Management and operation www.gxmu.edu.cn
Network Management and Operation www.gxmu.edu.cn Network architecture features May or may not conform to standards. Don’t provides enough detail how network to be implemented. Provides a set of generic concepts . Most architecture (plan) are designed for the long term use. Chapter 3 Network Architetures and Standarts
Chapter 3 Network Architeture and standarts Single Layer Model First Communication Between Computer Devices The communication and application software be intermingled (To mix The early networks were not flexible Single specification for all aspects of communication Hardware Hardware & Software Software DEVICE A DEVICE B network Management and operation www.gxmu.edu.cn
Network Management and Operation www.gxmu.edu.cn Single Layer Model First Communication Between Computer Devices The communication and application software be intermingled (To mix). DEVICE A Hardware & Software Hardware & Software DEVICE B 1 The early networks were not flexible. Single specification for all aspects of communication Chapter 3 Network Architetures and Standarts
Chapter 3 Network Architetures and standarts IBM SNA(System Network Architecture) IBM: 1974 by the first computer network architecture BM'S SNA is a proprietary architecture NOTE: Not SNA(storage area network) Most network architectures developed since use a layered approach SNA Transacton servce Application Alcains Presentation services Presentaton ata How co Transport SLc额2 Transmission control Path contr Network Data Link control Data link network Management and operation www.gxmu.edu.cn
Network Management and Operation www.gxmu.edu.cn IBM SNA(System Network Architecture) IBM : 1974 by the first computer network architecture IBM’s SNA is a proprietary architecture NOTE:Not SNA(storage area network) Most network architectures developed since use a layered approach. Chapter 3 Network Architetures and Standarts
Chapter 3 Network Architetures and standarts Communication standard The rules that are established to ensure compatibility among similar communications products and services Communications standards are the flesh on the architectural skeleton They specify how a particular communications product, service, or interface will operate V,90 modem network Management and operation www.gxmu.edu.cn
Network Management and Operation www.gxmu.edu.cn Communication standard The rules that are established to ensure compatibility among similar communications products and services. Communications standards are the flesh on the architectural skeleton. They specify how a particular communications product, service,or interface will operate. V.90 modem Chapter 3 Network Architetures and Standarts
+y Chapter 3 Network Architetures and standarts 3. 3 why have network architectures? 1.commUnicationsystemwerebecomingtoo compleX 2. wanted to be isolated from the complexities of the network 3. Wanted to connect different types of devices to the network 4. Distributed processing and client-server processing became practical 5. Network needed to be managed network Management and operation www.gxmu.edu.cn
Network Management and Operation www.gxmu.edu.cn 3.3 why have network architectures? 1.Communication system were becoming too complex. 2. wanted to be isolated from the complexities of the network. 3.Wanted to connect different types of devices to the network. 4.Distributed processing and client-server processing became practical. 5.Network needed to be managed. Chapter 3 Network Architetures and Standarts