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Chapter 7 LAN Operating Systems. LAN Software Software Compatibility Network Operating System (NOP) Architecture NOP Functions NOP Trends. LAN Software. Network operating systems Interface between hardware and application software

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chapter 7 lan operating systems
Chapter 7LAN Operating Systems
  • LAN Software
  • Software Compatibility
  • Network Operating System (NOP) Architecture
  • NOP Functions
  • NOP Trends
lan software
LAN Software
  • Network operating systems
    • Interface between hardware and application software
  • Application software: client front ends and server back ends or engines
    • Productivity software: e-mail, groupware etc.
    • Resource management software: security & monitoring
vertical software compatibility
Vertical Software Compatibility
  • Common compatibility protocol
  • Types
    • Server: hardware drivers, OS, network operating system, DBMS, application back-ends, e-mail, groupware, distributed processing
    • Client: hardware drivers, OS, network operating system, database front-end, query tools, application tools, groupware, other network applications, distributed processing front-end, user interfaces
horizontal software compatibility
Horizontal Software Compatibility
  • Transparency between similar software layers between different client and servers
  • Use middleware
    • Database middleware
    • Network operating system middleware
    • Operating system middleware
    • Distributed application middleware
nop architectures
NOP Architectures
  • Peer-to-peer
  • Client/server
  • Current client/server
peer to peer noss
Peer-to-Peer NOSs
  • Traditional NOSs: LANtastic or PowerLAN
  • Printing & file sharing for less than 50 users
  • Workstation as service requester (client) and/or service provider (server
  • Lacking interoperability and scalability
client server noss
Client/server NOSs
  • Client software and server software: Netware3.12 and Microsoft LANManager
  • Scalability, fast, reliability
  • Lacking interoperability
current trend of noss
Current Trend of NOSs
  • Client NOSs: universal client
  • Server NOSs have performance characteristics
    • NetWare for file and printing servers
    • Windows NT, OS/2, UNIX for application servers
  • Small business NOSs
    • High-quality file and printing sharing service
    • DOS based, with minimal memory and disk requirement
    • Easy installation, configuration, and management
    • Dedicated 32-bit server software
    • Bundled workgroup software (chat, e-mail)
    • Easy migration to server-based NOSs
client nos
Client NOS
  • Windows 95, OS/2 Warp Connect, Windows NT Workstation
  • Functions
    • Operating system capabilities
    • Peer-to-peer networking capabilities
    • Client software to communicate with different server network operating systems
client nos os capabilities
Client NOS - OS Capabilities
  • Desired characteristics
    • 32-bit OS
    • Preemptive multitasking
    • Protect memory space
    • Symmetrical multiprocessing (SMP)
    • Multithreading
  • User interface: object-oriented, windows
client nos os capabilities11
Client NOS - OS Capabilities
  • Application program support
    • Backward compatibility or legacy applications (16-bit)
    • 32-bit applications
  • Plug-n-play (PnP) features
    • PnP devices
    • PnP drivers
    • Reconfiguration
client nos peer to peer networking capabilities
Client NOS - Peer-to-Peer Networking Capabilities
  • File and printer sharing
  • Workgroup application
client nos networking capabilities
Client NOS - Networking Capabilities
  • Multiple servers
  • Transfer protocols
  • Remote access
  • Laptop synchronization (with desktop)
    • Copy by date option: date range
    • Bidirectional option
    • Cloning option
    • Refresh option: existing files
    • Delta file synchronization: changes
client nos analysis
Client NOS -Analysis
  • Hardware/platform
    • Required-recommended memory
    • 16 or 32 bit
    • User interface
  • Operating system capabilities
  • Peer-to-peer networking capabilities
  • Client networking capabilities
sever noss types
Sever NOSs - Types
  • UNIX
  • TCP/IP
  • NFS
  • NetWare
  • Windows NT
slide16
UNIX
  • Portability
    • Hardware platform
    • Application programs
  • Modularity
tcp ip
TCP/IP
  • Internet suite of protocols
  • De facto standard for communication between heterogeneous network computers
nsf network file system
NSF - Network File System
  • Sun Microsystems
  • Allows multiple different computing platforms to share files
    • Between NetWare and Windows NT
    • Between UNIX workstations, minicomputers, and mainframe
netware
NetWare
  • Applications
    • File server
    • Printing server
  • Global directory service: NetWare Directory Service (NDS)
    • Distributed
    • Replicated
windows nt
Windows NT
  • Applications
    • Web server
    • Database server
    • Application server
  • Primary domain controller (PDC)
    • Domain directory service
sever noss functions
Sever NOSs - Functions
  • Directory service
    • Directory interoperability
      • X.500
      • Light-weight directory access protocol (LDAP)
      • Microsoft’s open directory services interface (ODSI)
  • Application services
    • Preemptive multitasking
    • 32-bit execution
    • Multithreaded application support
    • Program execution in protected memory space
sever noss functions22
Sever NOSs - Functions
  • File service
    • System management
    • SQL
    • Mail & schedule
    • SNA gateway to IBM mainframe network
  • Network clients services
    • DOS
    • Windows
    • Apple
    • OS/2
    • UNIX or NFS
sever noss functions23
Sever NOSs - Functions
  • Network protocols supported
    • Multiprotocol routing
  • Remote access and gateway service
  • Management and administration service
    • Installation, configuration and administration
    • Integration and migration
    • Security: authentication, access rights
    • Audit trail and event logs
    • RAID
sever noss analysis
Sever NOSs Analysis
  • Hardware/platform
  • Installation and configuration
  • Networking and connectivity
  • Management and administration
hardware platform
Hardware/platform
  • Min/max memory
  • Min/max disk space
  • CPUs
  • Symmetrical multiprocessing
  • Preemptive multitasking
  • Multithreaded application support
  • Program execution in protected memory space
installation and configuration
Installation and Configuration
  • Auto configuration
  • No. of NIC drivers
networking and connectivity
Networking and Connectivity
  • Clients supported
  • Protocols supported
  • Naming services
  • Remote access
  • E-mail gateway
  • Web browser
  • Messaging services
management and administration
Management and Administration
  • Central management
  • SNMP for enterprise management
  • Audit trails and event logs
  • Security
  • RAID
server nos trends
Server NOS Trends
  • Symmetrical multiprocessing
  • Clustering and fault tolerance
assignment
Assignment
  • Review chapters 5-7
  • Read Palmer: chapters 1-9
  • Prepare exam 2
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