???????????????????????????????????? Computer Network and Distributed LAN System Software

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????????????????????????????????????Computer
Network and DistributedLAN System Software

• ??????????? ????????????

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Content

• ???????????????? LAN System Software
• ?????????? System Software ? Workstation
• ?????????? System Software ? Server
• Software ??? Printer
• Backup Software

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????????????????? Server ??? Workstation

• ????? Server Load OS ?????????????????????? ????
  Request ??? Workstation
• Workstation ????????????????????????? Server
  ??????
• Logon to Server
• Logon to Domain
• Logon to 1 Server / n Servers
• Authentication ???? username password
• Address ??? Server ???? workstation ????????
• ??? Workstation ?????? Address ?????????

Client Computer
Client Operating System
Redirector
Application Program
LanCom
Medium
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Services Advertising Protocal SAP

• ???????? Application Layer
• Server ????????????????? Broadcast SAP ?????
  ????????????????????
• Server Address
• Server Services
• Broadcast ???????????? ????????
• Workstation ??????????????????????????????? Node
  ????
• ????? Server Shutdown ????????????????????????????
  ??? Node
• ?????????? Server ????????????????????? Server
  Table ???????

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Network Directory

• ????????????????????????????? Server , User
  ??????????????????
• network directory ??? database ??????????????????
  ??????? Lan ????
• Objects , Properties object
• Server , Server properties
• Server Address ???????
• ?????????????????????????????????
• network directory ???????? distribute
  ???????????????? ???????????

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Client/Server Dialogue
Client Operating System
Redirector

• Application ??? IRQ ????? OS
• Redirector ???????????? IRQ ?????????????????? OS
  ???? LAN
• OS ????????????????????????? Request ???????????
  Local ???? LAN

Application Program
LanCom
Client Operating System
Redirector
Application Program
LanCom
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??????? Redirected ????

• ???? Workstation
• Redirector ?????????????????? ?????? Server
  ???????????????? ??????? LanCom
• LanCom ??????? PDU ?????? Network Layer
• PDU ????????? MAC Protocol
• Mac Protocol ??????? Medium
• ???? Server
• ??? frame ??????? message ??????? MAC Layer
• Mac Layer ??????? Error ???????????????????
• ??? PDU ????????? Network Layer
• Network Layer ??? Data ?????? Request ????? OS
• OS?????????

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?????????????? Server Software

• LAN OS Function
• Optimized I/O ??????????????????? Read/Write ,
  Seek
• Disk Configuration Partitioning , Single or
  Multiple disk Volume , Raid
• Fault Tolerance ???????????????? ?????? Error
  ????????????? ??? Recovery ????
• RAID (Redundant Array of In expensive Disk) Level
  0-5
• RAID 5 ????????????????? disk 3 ????
  ??????????????? data ????????????? ??????????????
  ????? disk ????????????????????????????????????
• User Management
• Security Management
• Hardware / Device Management
• ???????? multithread

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End.
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Assignment

• ???????????????????????????????????? 2 ????????
• Windows Base , Unix/Linux Base
• ????????????????
• ???????????? ???? ?????????? ?????????????
• ?????????????? ???? Hardware Requirement
  ?????????????????????
• ??????? / ??????????
• ?????