网络体系与协议复习提纲.ppt

网络体系结构与协议 复习提纲 Network Model SAPs and transmission model SAP and PDU header Network Model ICI basic info. Link layer: P2P Link, MP link Network Layer Transport Layer Network Model Service primitive Function vs. Service Network Model Peer entity criterion Transparent criterion Network Model Independent criterion Network Model Protocol stack Network Model Address structure Flat Hierarchy Addressing Address=Flat Address=subnet, Node,Link Address=Subnet, flat Protocol Reliability problem Error detection technique Error recovery technique Reliable transmission technique Connection orient and connectionless protocol Protocol Reliable probability Frame error probability Reliable transmission probability Retransmit to improve the reliability Protocol Error recover technique Retransmission ON: NAK or timeout Cooperation technique PDU sequential number Sequence number advance ACK Protocol Stop and Wait Go Back-N Selective repeat Sending window Ws and receiving window Wr Relay Basic Relay Repeater, bridge, router, trans-gateway, app-gateway Complex relay Multiple layer relay Relay type and properties In protocol relay Out protocol relay Relay Relay performance Relay on connection oriented Relay on connectionless Relay and protocol translation Basic protocol translation problems Relay Relay and QoS Queue model Basic relay queue technique CQ PQ FQ, WFQ Interconnection Interconnection model Tunnel model Overlay model Common and difference properties Route Model Routing and routed FIB Route algorithm Algorithm principle Protocol implementation Protocol verification Protocol DV route SPF route Static route * Transmission Functions 1 i j k 2 Data H SAPs PDU type Transmission Functions 1 i j k 2 Data H Protocol Entity (ICI,DU) Protocol Entity Protocol Entity Services Services Data ACK Conn.Req DU Open Conn.Resp Opened Req Ind Resp Conf DU Open Function Data Transmission Function Entity Entity DU Add Header processing Header A1 A2 A3 B1 B2 B3 Channel Protocol Entity ? ? ?