原版的操作系统-精髓与设计原理-第5版Chapter13.pdf

Networking

ChapterChapter1212

1

DistributedDistributedCapabilitiesCapabilities

•CCommuniicatiionsarchihitectures

–Softwarethatsupportsagroupof

networkedcomputers

•NetworkNetworkoperatingoperatingsystemsystem

–Eachcomputerhasitsownprivate

operatingoperatingsystemsystem

•Distributedoperatingsystem

–Commonoperatingsystemsharedbya

networkofcompputers

2

TheNeedforaProtocol

Architecture

•CComputercommuniicatiions

–Exchangeofinformationbetween

computersforthepurposeofcooperative

action

•Computernetwork

–WhenWhentowtoworormoremorecomputerscomputersareare

interconnectedviaacommunication

networknetwork

3

TwoTwoConceptsConcepts

•PProtocoll

–Usedforcommunicationbetweenentitiesin

differentsystems

•ProtocolProtocolarchitecturearchitecture

–Brokenintosubtasks,eachofwhichis

implementedimplementedseparatelyseparately

4

FileFileTransferTransfer

5

TheTCP/IPProtocol

Architecture

•PProtocollsuiite

•Fiverelativelyyindeppendentlayyers

–Physical

–NetworkNetworkaccessaccess

–Internet

–Host-to-host,ortransport

–Apppplication

6

PhysicalPhysicalLayerLayer

•SSpecifyiifing

–thecharacteristicsofthetransmission

me