Networking Concepts Lesson 08 - Simple Network Operations - Eric Vanderburg

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Networking Concepts Lesson 08 - Simple Network Operations - Eric Vanderburg

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Networking Concepts Lesson 08 - Simple Network Operations - Eric Vanderburg

  1. 1. Chapter 8 Simple Network Operations Networking Concepts – Eric Vanderburg ©2005
  2. 2. NOS  DOS, Windows 3x – LAN Manager  OS Features Bridges Hardware & Software (another layer to minimize complexity)  Memory management  Multitasking – many processes at the same time  Preemptive – OS controls process access to CPU (uses time slices) Win95 & higher  Cooperative – OS cannot stop processes once they start using the CPU  Networking Concepts – Eric Vanderburg ©2005
  3. 3. NOS Functions  Share computer resources & peripherals  Control remote machines  Implement security for resources  Authentication  Permissions  Rights  Maintain directory of resources  Provide network services to applications Networking Concepts – Eric Vanderburg ©2005
  4. 4. Components  Naming  Services UNC (Universal Naming Convention) ComputerNameShareName  UNC Aware – allows R or W to network storage via UNC path (non-UNC aware require mapped drives)  DNS  NetBIOS  Only 8 character name allowed in DOS (8.3 rule)  Certain illegal characters  Hidden names (ComputerNameSecretShare$)  Networking Concepts – Eric Vanderburg ©2005
  5. 5. Directory Services     Search for the resource you need Restricts views based on ACL Microsoft AD (Active Directory) Novell eDirectory or NDS        NAL (NetWare Application Launcher) – does a network inventory and stores it in eDirectory Formerly used a flat file database called the Bindery (NW3x) NW4x systems can run Bindery emulation to work with 3x Linux NIS (Network Information System) Sun Directory Server X.500 LDAP (Lightweight Directory Access Protocol) Networking Concepts – Eric Vanderburg ©2005
  6. 6. Client Software  Logon  Requests resources  Redirector  Designator – substitutes UNC name for a mapped drive letter Networking Concepts – Eric Vanderburg ©2005
  7. 7. Access Control  Who can access what resources  What they can do with those resources  How many can access resources simultaneously  When can they access those resources Networking Concepts – Eric Vanderburg ©2005
  8. 8. Server Responsibilities  Manage users and groups  Authenticate users  Advertise resources, resolve names & maintain a directory  Management, logging, & auditing  Provide redundancy Networking Concepts – Eric Vanderburg ©2005
  9. 9. Installation  Before you begin: Consider server role  Determine file system  Available hardware  Choose a name & naming conventions  Understand network size, topology, and network OS types  Redundancy options  Clustering  Mirroring  Duplexing   Placement within forest & domain Networking Concepts – Eric Vanderburg ©2005
  10. 10. Naming Conventions  Names should be based on a system  Users & resources Eric Vanderburg, username:evanderburg  Proper hierarchy   Computer  names & DNS names First Cleveland Domain Controller, name: CleDC01  Educate users to save files with proper file name structures in the proper folders  Titles of email messages Networking Concepts – Eric Vanderburg ©2005
  11. 11. Storage  Partition – logical section of disk space  Multiple boot – select from many OS’s upon computer startup  Single partition, single drive, single OS  Multiple partitions, single drive, single OS Separation is good  One drive so activity is high   Multiple  partitions, multiple drives, single OS Distributes drive activity  Fault tolerant storage Networking Concepts – Eric Vanderburg ©2005
  12. 12. File System         FAT (File Allocation Table) FAT32 NTFS CDFS EFS (Extent File System) GPFS (General Parallel File System) Different file systems support different sized disks, security options, file size, naming, and cluster sizes Some file systems cannot be used in some OS’s Networking Concepts – Eric Vanderburg ©2005
  13. 13. Network Services  Installing Services  Starting & stopping services  Services in Linux  Edit config files  Install new package  Package manager may be available Networking Concepts – Eric Vanderburg ©2005
  14. 14. Sharing in Linux  Use NFS for Linux only share  Use Samba for Linux to Windows shares Networking Concepts – Eric Vanderburg ©2005
  15. 15. Network Applications        Multiple concurrent use Email Messaging Scheduling Groupware Databases Architectures    Centralized – fully stored on server File-system sharing – client app with shared storage area or database True client/server – some components are on the client and some on the server. Effectively uses client processing Networking Concepts – Eric Vanderburg ©2005
  16. 16. Email       X.400 IMAP (Internet Message Access Protocol) – downloads and displays messages, can be sent to a client or run from a web based app, fault tolerant with advanced controls for group collaboration. MHS (Message Handling System) – Novell’s messaging service POP3 (Post Office Protocol version 3) – downloads messages to the client, messages managed locally SMTP – standard for sending mail messages X.500 – improved directory and has a global address database Networking Concepts – Eric Vanderburg ©2005
  17. 17. Messaging         Oscar – AIM protocol, now used for ICQ also, direct connections do not go through AIM servers File sharing services often have chat (Napster, Direct Connect, eDonkey, ect..) IRC – primarily for group chats, oldest (1989) Jabber – Uses TCP & XML, email-like names used. Can use other services also: username@aim.jabber.org Novell GroupWise Manager – uses SSL Lotus Sametime XMPP (Extensible Messaging & Presence Protocol) SIMPLE (*SIP for Instant Messaging & Presence Leveraging Extensions) Networking *SIP - Session Initiation Protocol Concepts – Eric Vanderburg ©2005
  18. 18. Scheduling & Groupware  Scheduling  Calendars  Integrated into other programs  Groupware  Many users collaborate on a single file  Novell GroupWise  Lotus Notes  Microsoft SharePoint Networking Concepts – Eric Vanderburg ©2005

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