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Basic networking concepts

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Basic networking concepts Unit objectives Compare various types of networks Discuss types of servers Discuss LAN topologies Discuss planning in network design – PowerPoint PPT presentation

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Title: Basic networking concepts


1
Basic networking concepts
  • Unit objectives
  • Compare various types of networks
  • Discuss types of servers
  • Discuss LAN topologies
  • Discuss planning in network design

2
Topic A
  • Topic A Networking fundamentals
  • Topic B Types of servers
  • Topic C Topologies
  • Topic D Planning in network design

3
Features of legacy networks
  • All processing takes place at the central
    computer
  • Dumb terminals or terminals having no processing
    power provide user access to the
    mainframe/minicomputer
  • There are limited off-the-shelf software products
    available for purchase as most applications are
    custom-built
  • Support staff is needed for management and
    control
  • Incremental growth is prohibitively expensive

4
Features of peer-to-peer networks
  • Workstations store their own application and data
    files
  • Speed is primarily a factor of the workstation
    used as processing occurs at the workstation
  • Each node on the system talks to all the other
    nodes
  • Peer-to-peer communications make some level of
    file and printer sharing possible

5
Features of peer-to-peer networks
  • No one system is in charge of the network
  • Security might be limited
  • This type of system does not work well with more
    than 10 workstations or nodes

6
Client/server networks
  • In a client/server environment, there are
    separate systems providing resources and
    accessing resources
  • The client/server model provides distributed
    processing
  • Application and data files can be stored on the
    file server
  • Files are downloaded to intelligent workstations
    (clients) for processing
  • Results are uploaded to the server for storage
  • The server might provide additional services to
    the client

7
CANs, MANs, and WANs
  • As networks in geographically contiguous
    buildings begin to be connected, a campus area
    network (CAN) is formed
  • Metropolitan area networks (MANs) connect
    networks that are non-contiguous, but located
    within a local calling area
  • A Wide area network (WAN) links networks that are
    located in different local calling areas, known
    as Local Access Transport Areas (LATA)

8
CANs and MANs
9
WAN characteristics
  • Wide geographic area, any size up to national or
    international
  • Low to high speed links
  • Remote links that might be operational LANs or
    groups of workstations only

10
WAN
11
Activity A-1
Discussing network types
12
The role of Network Operating Systems
  • A Network Operating System (NOS) runs on the
    server in a client/server network configuration
    and turns a PC into a network server
  • Examples of NOSs include Microsoft NT/2000
    Server/Server 2003, Novell NetWare, IBM OS/2,
    Banyan VINES, Mac OSX, AppleShare IP, UNIX and
    Linux

13
Servers, workstations, and hosts
  • Servers
  • Computers that have been optimized to run a
    network operating system
  • Workstations
  • A personal computer that is connected to a
    network, which can perform tasks through
    applications or utilities
  • Hosts
  • Any network device that has a TCP/IP address

14
Activity A-2
Discussing network operating systems
15
Topic B
  • Topic A Networking fundamentals
  • Topic B Types of servers
  • Topic C Topologies
  • Topic D Planning in network design

16
Types of servers
  • Include
  • Fax servers
  • CD servers
  • E-mail servers
  • Print servers
  • Other types of servers

17
Fax servers
  • Permits users to send and, in some cases, receive
    facsimiles at their network workstations
  • Manage the re-direction of faxes to the
    appropriate location

18
CD servers
  • Usually a stand-alone device consisting of four
    or more, perhaps as many as 100 CD-ROM readers
  • Installing a CD server can provide the entire
    enterprise with access to installation media,
    such as workstation applications, reference media
    and periodicals, or any other data needed by
    multiple users

19
Activity B-1
Discussing fax servers and CD servers
20
E-mail servers
  • Electronic mail (e-mail) is one of the popular
    forms of business and personal communication
  • Frequently implemented on dedicated servers due
    to the large volume of messages a network will
    generate

21
Print servers
  • Can be directly attached to workstations or
    servers
  • Most network operating systems support the use of
    third-party print services such as the JetDirect
    series from Hewlett-Packard and the NetPort line
    from Intel
  • Most third-party print servers offer efficient
    and reliable operation

22
Other types of servers
  • Web servers
  • Database servers
  • Application servers
  • Others
  • All provide specific functionality and may be
    dedicated or share functionality with other
    servers

23
Activity B-2
Discussing e-mail, print and other servers
24
Topic C
  • Topic A Networking fundamentals
  • Topic B Types of servers
  • Topic C Topologies
  • Topic D Planning in network design

25
Topology overview
  • Defines how the physical media links the network
    nodes
  • Types of topology include
  • Bus
  • Ring
  • Star
  • Mesh

26
Bus topology
27
Ring topology
28
Star topology
29
Mesh topology
30
Activity C-1
Discussing topologies
31
Topic D
  • Topic A Networking fundamentals
  • Topic B Types of servers
  • Topic C Topologies
  • Topic D Planning in network design

32
Creating a plan
  • Determine what business requirements must be met
  • Review the current infrastructure
  • Review new and existing technologies that can be
    used to meet business needs
  • Determine the appropriate infrastructure
    requirements
  • Document the design
  • Review the documentation with the appropriate
    technical personnel and business leaders and
    modify as necessary

33
Ongoing planning
  • Essential for a good network plan
  • The plan needs to be re-evaluated frequently to
    see if its implementation is feasible in the
    current environment

34
Activity D-1
Planning in network design
35
Unit summary
  • Discussed the role of network operating systems
  • Discussed different types of servers
  • Learned about various topologies
  • Discussed planning in network design
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