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Chapter One

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Chapter One An Introduction to Networking Let s Get Acquainted What is your name and how would you like us to address you? Is this your first networking class? – PowerPoint PPT presentation

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Title: Chapter One


1
Chapter One
  • An Introduction
  • to Networking

2
Lets Get Acquainted
  • What is your name and how would you like us to
    address you?
  • Is this your first networking class?
  • Are you taking any other networking classes?
  • What is your background in networking?
  • Are you a career changer?
  • Why did you sign up for this class and what are
    your expectations?
  • Are you interested in any industry certifications
    such as Net, MCP, MCSE, or CCNA?
  • What is your next step in technical training and
    industry certification after finishing this
    class?

3
Objectives
  • List advantages of networked computing relative
    to standalone computing
  • Identify elements of a network
  • Describe several specific uses of a network

4
Objectives
  • Distinguish between client/server and
    peer-to-peer networks
  • Identify some of the certifications available to
    networking professionals
  • Identify kinds of non-technical, or soft,
    skills to help in succeeding as a networking
    professional

5
Networks and Standalone Computers
  • Network
  • Group of computers and other devices connected by
    some type of transmission media
  • Networks enable users to share devices and data,
    collectively called a networks resources
  • Standalone computer
  • Uses programs and data only from its local disks
    and is not connected to a network

6
Sneakernet
  • Method of sharing data by copying it to a disk
    and carrying the disk from computer to computer

7
Local and Remote Computers
  • Local computer
  • Computer on which user is working
  • Remote computer
  • Computer that user controls or works on via
    network connection

8
Peer-to-Peer Network
  • Computers communicate on single segment of cable
    and share each others data and devices
  • Simple example of a local area network (LAN)

9
Local Area Network (LAN)
  • Network of computers and other devices confined
    to relatively small space
  • LANs involving many computers are usually
    server-based
  • On a server-based network, special computers
    (known as servers) process data for and
    facilitate communication between other computers
    on the network (known as clients)

10
Networking Basics
  • Workstation
  • Computer that typically runs a desktop operating
    system and connects to a network
  • Client/server architecture
  • Networking model in which clients use central
    server to share applications, devices, and data

11
Networking Basics
  • Client/server network
  • Network based on client/server architecture
  • Network operating system
  • Special software designed to manage data and
    other resources on a server for a number of
    clients

12
Networking Basics
13
Networking Basics
14
Advantages of Server-Based over Peer-to-Peer
Networks
  • User login accounts and passwords can be assigned
    in one place
  • Access to multiple shared resources can be
    centrally granted
  • Servers are optimized to handle heavy processing
    loads and dedicated to handling requests from
    clients
  • Servers can connect more than a handful of
    computers

15
MANs and WANs
  • Metropolitan area network (MAN)
  • Network connecting clients and servers in
    multiple buildings within limited geographic area
  • Wide area network (WAN)
  • Network that spans large distance and connects
    two or more LANs
  • The Internet is an example of a very intricate
    and extensive WAN that spans the globe

16
WAN
17
Elements Common to All Server-Based Networks
  • Client
  • In addition to referring to a computer on the
    network, may also refers to human user of client
    workstation
  • Server
  • Workstation
  • Network interface card (NIC)
  • Enables workstation to connect to the network and
    communicate with other computers

18
Elements Common to All Server-Based Networks
19
Elements Common to All Server-Based Networks
  • Network operating system (NOS)
  • Host
  • Server that manages shared resources
  • Node
  • Client, server, or other device that can
    communicate over a network and that is identified
    by a unique identifying number, known as its
    network address

20
Elements Common to All Server-Based Networks
  • Topology
  • Physical layout of computer network

21
Elements Common to All Server-Based Networks
  • Protocol
  • Rules network uses to transfer data
  • Data Packets
  • The distinct units of data transmitted from one
    computer to another on a network

22
Elements Common to All Server-Based Networks
  • Addressing
  • Scheme for assigning unique identifying number to
    every workstation on network
  • The number that uniquely identifies each
    workstation and device on a network is its address

23
Elements Common to All Server-Based Networks
  • Transmission media
  • Means through which data are transmitted and
    received

24
How Networks Are Used
  • Services
  • Features provided by a network
  • File and print services
  • Communications services
  • Mail services
  • Internet services
  • Management services

25
Network Services
  • File services
  • Refers to capability of a server to share data
    files, applications, and disk storage space
  • Server that provides file services is called a
    file server
  • Print services
  • Allows printers to be shared by several users on
    a network

26
Network Services
  • Communications services
  • Allow remote users to connect to a network
  • Remote user
  • Person working on a computer in a different
    geographical location from the LANs server
  • Communications server
  • Server that runs communications services
  • Also referred to as access servers and remote
    access servers

27
Network Services
  • Mail services
  • Coordinate storage and transfer of e-mail between
    users on a network
  • Gateway
  • Combination of software and hardware enabling two
    different kinds of networks to exchange data
  • Internet services
  • Enable networks to communicate with the Internet

28
Network Services
  • Management services
  • Centrally administer and simplify complicated
    management tasks on the network
  • Numerous services fall under category of network
    management

29
Important Management Services
  • Traffic monitoring and control
  • Traffic
  • Data transmission and processing activity taking
    place on a computer network at any given time
  • Segment
  • Part of LAN that is logically separated from
    other parts of LAN and that shares fixed amount
    of traffic capacity

30
Important Management Services
  • Load balancing
  • Distributing process activity evenly across a
    network so that no single device is overwhelmed
  • Hardware diagnosis and failure alert
  • Determining when a network component fails and
    automatically notifying network administrators
    through e-mail or pager

31
Important Management Services
  • Asset management
  • Collecting and storing data on number and types
    of software and hardware assets in an
    organizations network
  • License tracking
  • Determining how many copies of a single
    application are currently in use on a network

32
Important Management Services
  • Security auditing
  • Evaluating what security measures are currently
    in force and notifying network administrator if a
    security breach occurs
  • Software distribution
  • Automatically transferring data file or program
    from the server to a client on the network

33
Important Management Services
  • Address management
  • Centrally administering a finite number of
    network addresses for an entire LAN
  • Backup and restoration of data
  • Backing up
  • Copying critical files to a secure storage area
  • Restoring
  • Retrieving data if original files are lost or
    deleted

34
Becoming a Network Professional
  • Mastering the technical challenges
  • Developing your soft skills
  • Pursuing certification
  • Finding a job in networking
  • Joining professional associations

35
Mastering the Technical Challenges
  • Installing, configuring, and troubleshooting
    network server software
  • Installing, configuring, and troubleshooting
    network server hardware
  • Installing, configuring, and troubleshooting
    network client software
  • Installing, configuring, and troubleshooting
    network client hardware

36
Mastering the Technical Challenges
  • Understanding the characteristics of different
    transmission media
  • Understanding network design
  • Understanding network protocols
  • Understanding how users interact with the network

37
Mastering the Technical Challenges
  • Specialty areas in high demand for networking
    professionals
  • Network security
  • Internet and intranet design
  • Network management
  • Voice/data integration
  • Remote and mobile computing

38
Mastering the Technical Challenges
  • Specialty areas in high demand for networking
    professionals (cont.)
  • Data integrity and fault tolerance
  • In-depth knowledge of Microsoft networking
    products
  • In-depth knowledge of NetWare networking products
  • In-depth knowledge of router configuration and
    management

39
Developing Your Soft Skills
  • Skills not easily measured but important to a
    networking career
  • Customer relations
  • Oral and written communications
  • Dependability
  • Teamwork
  • Leadership abilities

40
Pursuing Certification
  • Certification
  • Process of mastering material pertaining to a
    particular hardware system, operating system,
    programming language, or other software program,
    then proving your mastery by passing a series of
    exams
  • Computer Technology Association (CompTIA)
  • An association that sets industry-wide standards
    for computer professionals

41
Pursuing Certification
  • A
  • Certification established by CompTIA
  • Verifies knowledge about PC operation, repair,
    and management
  • Microsoft Certified Systems Engineer (MCSE)
  • Certification established by Microsoft
  • Demonstrates in-depth knowledge about Microsofts
    products

42
Pursuing Certification
  • Certified NetWare Engineer (CNE)
  • Certification established by Novell
  • Demonstrates in-depth understanding of Novells
    networking software
  • Network (Net)
  • Certification established by CompTIA
  • Verifies broad, vendor-independent networking
    technology skills

43
Pursuing Certification
  • Benefits of becoming certified include
  • Better salary
  • Greater opportunities
  • Professional respect
  • Access to better support

44
Finding a Job in Networking
  • Search the Web
  • Read the paper
  • Visit a career center
  • Network
  • Attend career fairs

45
Finding a Job in Networking
46
Joining Professional Associations
  • Benefits can include
  • Connecting with people who have similar interests
  • Providing new opportunities for learning
  • Allowing access to specialized information
  • Giving you tangible assets such as free goods

47
Joining Professional Associations
48
Chapter Summary
  • A Network is a group of computers or other
    devices connected by some type of transmission
    media
  • Networks may be small or large, connecting
    computers in one office or across the world
  • All networks offer advantages relative to the use
    of standalone computers
  • Simplest form of a network still used today
    connects a handful of computers through one cable
    and uses peer-to-peer communication

49
Chapter Summary
  • A LAN is a network of computers and other devices
    confined to a relatively small space
  • A WAN is a network connecting two or more
    geographically distinct LANs
  • All server-based networks share some common
    elements
  • The physical layout of a computer network is
    called a topology
  • Network protocols are rules the network uses to
    transfer data

50
Chapter Summary
  • File and print services provide foundation for
    networking
  • Communications services allow remote users to
    connect to the network
  • Mail services allow networks users to exchange
    and store e-mail
  • Internet services enable organizations to connect
    to the Internet
  • Network management services centrally administer
    and simplify complicated management tasks on
    network

51
Chapter Summary
  • Networking professionals are in demand
  • Pursuing certification can benefit you in many
    ways
  • Hone your soft skills
  • Numerous resources are available in searching for
    networking positions
  • Joining associations can benefit your
    professional growth
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