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Chapter OneChapter One
An IntroductionAn Introduction
to Networkingto Networking
ObjectivesObjectives
List advantages of networked computingList advantages of networked computing
relative to standalone computingrelative to standalone computing
Identify elements of a networkIdentify elements of a network
Describe several specific uses of aDescribe several specific uses of a
networknetwork
ObjectivesObjectives
Distinguish between client/server andDistinguish between client/server and
peer-to-peer networkspeer-to-peer networks
Identify some of the certifications availableIdentify some of the certifications available
to networking professionalsto networking professionals
Identify kinds of non-technical, or “soft,”Identify kinds of non-technical, or “soft,”
skills to help in succeeding as askills to help in succeeding as a
networking professionalnetworking professional
Networks and StandaloneNetworks and Standalone
ComputersComputers
NetworkNetwork

Group of computers and other devicesGroup of computers and other devices
connected by some type of transmissionconnected by some type of transmission
mediamedia

Networks enable users to share devices andNetworks enable users to share devices and
data, collectively called a network’sdata, collectively called a network’s
resourcesresources
Standalone computerStandalone computer

Uses programs and data only from its localUses programs and data only from its local
disks and is not connected to a networkdisks and is not connected to a network
SneakernetSneakernet
Method of sharing data by copying it to a diskMethod of sharing data by copying it to a disk
and carrying the disk from computer to computerand carrying the disk from computer to computer
Figure 1-1: Data sharing before the advent of networks
Local and Remote ComputersLocal and Remote Computers
Local computerLocal computer

Computer on which user is workingComputer on which user is working
Remote computerRemote computer

Computer that user controls or works on viaComputer that user controls or works on via
network connectionnetwork connection
Peer-to-Peer NetworkPeer-to-Peer Network
Computers communicate on single segment of cable andComputers communicate on single segment of cable and
share each other’s data and devicesshare each other’s data and devices
Simple example of a local area network (LAN)Simple example of a local area network (LAN)
Figure 1-2: Simple peer-to-peer network
Local Area Network (LAN)Local Area Network (LAN)
Network of computers and other devicesNetwork of computers and other devices
confined to relatively small spaceconfined to relatively small space
LANs involving many computers areLANs involving many computers are
usually server-basedusually server-based

On aOn a server-based networkserver-based network, special, special
computers (known ascomputers (known as serversservers) process data) process data
for and facilitate communication betweenfor and facilitate communication between
other computers on the network (known asother computers on the network (known as
clientsclients))
Networking BasicsNetworking Basics
WorkstationWorkstation

Computer that typically runs a desktopComputer that typically runs a desktop
operating system and connects to aoperating system and connects to a
networknetwork
Client/server architectureClient/server architecture

Networking model in which clients useNetworking model in which clients use
central server to share applications,central server to share applications,
devices, and datadevices, and data
Networking BasicsNetworking Basics
Client/server networkClient/server network

Network based on client/server architectureNetwork based on client/server architecture
Network operating systemNetwork operating system

Special software designed to manage dataSpecial software designed to manage data
and other resources on a server for a numberand other resources on a server for a number
of clientsof clients
Networking BasicsNetworking Basics
Figure 1-3:
LAN with a file
server
Networking BasicsNetworking Basics
Figure 1-4:
An example
of a complex
network
Advantages of Server-BasedAdvantages of Server-Based
over Peer-to-Peer Networksover Peer-to-Peer Networks
User login accounts and passwords can beUser login accounts and passwords can be
assigned in one placeassigned in one place
Access to multiple shared resources can beAccess to multiple shared resources can be
centrally grantedcentrally granted
Servers are optimized to handle heavyServers are optimized to handle heavy
processing loads and dedicated to handlingprocessing loads and dedicated to handling
requests from clientsrequests from clients
Servers can connect more than a handful ofServers can connect more than a handful of
computerscomputers
MANs and WANsMANs and WANs
Metropolitan area network (MAN)Metropolitan area network (MAN)

Network connecting clients and servers inNetwork connecting clients and servers in
multiple buildings within limited geographicmultiple buildings within limited geographic
areaarea
Wide area network (WAN)Wide area network (WAN)

Network that spans large distance andNetwork that spans large distance and
connects two or more LANsconnects two or more LANs

TheThe InternetInternet is an example of a veryis an example of a very
intricate and extensive WAN that spans theintricate and extensive WAN that spans the
globeglobe
WANWAN
Figure 1-5:
A simple
WAN
Elements Common to AllElements Common to All
Server-Based NetworksServer-Based Networks
ClientClient

In addition to referring to a computer on theIn addition to referring to a computer on the
network, may also refers to humannetwork, may also refers to human useruser ofof
client workstationclient workstation
ServerServer
WorkstationWorkstation
Network interface card (NIC)Network interface card (NIC)

Enables workstation to connect to the networkEnables workstation to connect to the network
and communicate with other computersand communicate with other computers
Elements Common to AllElements Common to All
Server-Based NetworksServer-Based Networks
Figure 1-6:
A network
interface
card (NIC)
Network operating system (NOS)Network operating system (NOS)
HostHost

Server that manages shared resourcesServer that manages shared resources
NodeNode

Client, server, or other device that canClient, server, or other device that can
communicate over a network and that iscommunicate over a network and that is
identified by a unique identifying number,identified by a unique identifying number,
known as its network addressknown as its network address
Elements Common to AllElements Common to All
Server-Based NetworksServer-Based Networks
Elements Common to AllElements Common to All
Server-Based NetworksServer-Based Networks
TopologyTopology

PhysicalPhysical
layout oflayout of
computercomputer
networknetwork
Figure 1-7: Commonly used network topologies
Elements Common to AllElements Common to All
Server-Based NetworksServer-Based Networks
ProtocolProtocol

Rules network uses to transfer dataRules network uses to transfer data
Data PacketsData Packets

The distinct units of data transmitted from oneThe distinct units of data transmitted from one
computer to another on a networkcomputer to another on a network
Elements Common to AllElements Common to All
Server-Based NetworksServer-Based Networks
AddressingAddressing

Scheme for assigning unique identifyingScheme for assigning unique identifying
number to every workstation on networknumber to every workstation on network

The number that uniquely identifies eachThe number that uniquely identifies each
workstation and device on a network is itsworkstation and device on a network is its
addressaddress
Elements Common to AllElements Common to All
Server-Based NetworksServer-Based Networks
TransmissionTransmission
mediamedia

MeansMeans
throughthrough
which datawhich data
areare
transmittedtransmitted
and receivedand received
Figure 1-8: Examples of network transmission media
How Networks Are UsedHow Networks Are Used
ServicesServices

Features provided by a networkFeatures provided by a network
File and print servicesFile and print services
Communications servicesCommunications services
Mail servicesMail services
Internet servicesInternet services
Management servicesManagement services
Network ServicesNetwork Services
File servicesFile services

Refers to capability of a server to share dataRefers to capability of a server to share data
files, applications, and disk storage spacefiles, applications, and disk storage space

Server that provides file services is called aServer that provides file services is called a
file serverfile server
Print servicesPrint services

Allows printers to be shared by several usersAllows printers to be shared by several users
on a networkon a network
Network ServicesNetwork Services
Communications servicesCommunications services

Allow remote users to connect to a networkAllow remote users to connect to a network
Remote userRemote user

Person working on a computer in a differentPerson working on a computer in a different
geographical location from the LAN’s servergeographical location from the LAN’s server

Communications serverCommunications server
Server that runs communications servicesServer that runs communications services
Also referred to asAlso referred to as access serversaccess servers andand remoteremote
access serversaccess servers
Network ServicesNetwork Services
Mail servicesMail services

Coordinate storage and transfer of e-mailCoordinate storage and transfer of e-mail
between users on a networkbetween users on a network
GatewayGateway

Combination of software and hardware enabling twoCombination of software and hardware enabling two
different kinds of networks to exchange datadifferent kinds of networks to exchange data
Internet servicesInternet services

Enable networks to communicate with theEnable networks to communicate with the
InternetInternet
Network ServicesNetwork Services
Management servicesManagement services

Centrally administer and simplify complicatedCentrally administer and simplify complicated
management tasks on the networkmanagement tasks on the network

Numerous services fall under category ofNumerous services fall under category of
network managementnetwork management
Important ManagementImportant Management
ServicesServices
Traffic monitoring and controlTraffic monitoring and control

TrafficTraffic
Data transmission and processing activity takingData transmission and processing activity taking
place on a computer network at any given timeplace on a computer network at any given time

SegmentSegment
Part of LAN that is logically separated from otherPart of LAN that is logically separated from other
parts of LAN and that shares fixed amount ofparts of LAN and that shares fixed amount of
traffic capacitytraffic capacity
Important ManagementImportant Management
ServicesServices
Load balancingLoad balancing

Distributing process activity evenly across aDistributing process activity evenly across a
network so that no single device isnetwork so that no single device is
overwhelmedoverwhelmed
Hardware diagnosis and failure alertHardware diagnosis and failure alert

Determining when a network componentDetermining when a network component
fails and automatically notifying networkfails and automatically notifying network
administrators through e-mail or pageradministrators through e-mail or pager
Important ManagementImportant Management
ServicesServices
Asset managementAsset management

Collecting and storing data on number andCollecting and storing data on number and
types of software and hardware assets in antypes of software and hardware assets in an
organization’s networkorganization’s network
License trackingLicense tracking

Determining how many copies of a singleDetermining how many copies of a single
application are currently in use on a networkapplication are currently in use on a network
Important ManagementImportant Management
ServicesServices
Security auditingSecurity auditing

Evaluating what security measures areEvaluating what security measures are
currently in force and notifying networkcurrently in force and notifying network
administrator if a security breach occursadministrator if a security breach occurs
Software distributionSoftware distribution

Automatically transferring data file or programAutomatically transferring data file or program
from the server to a client on the networkfrom the server to a client on the network
Important ManagementImportant Management
ServicesServices
Address managementAddress management

Centrally administering a finite number ofCentrally administering a finite number of
network addresses for an entire LANnetwork addresses for an entire LAN
Backup and restoration of dataBackup and restoration of data

Backing upBacking up
Copying critical files to a secure storage areaCopying critical files to a secure storage area

RestoringRestoring
Retrieving data if original files are lost or deletedRetrieving data if original files are lost or deleted
Becoming a NetworkBecoming a Network
ProfessionalProfessional
Mastering the technical challengesMastering the technical challenges
Developing your “soft skills”Developing your “soft skills”
Pursuing certificationPursuing certification
Finding a job in networkingFinding a job in networking
Joining professional associationsJoining professional associations
Mastering the TechnicalMastering the Technical
ChallengesChallenges
Installing, configuring, and troubleshootingInstalling, configuring, and troubleshooting
network server softwarenetwork server software
Installing, configuring, and troubleshootingInstalling, configuring, and troubleshooting
network server hardwarenetwork server hardware
Installing, configuring, and troubleshootingInstalling, configuring, and troubleshooting
network client softwarenetwork client software
Installing, configuring, and troubleshootingInstalling, configuring, and troubleshooting
network client hardwarenetwork client hardware
Mastering the TechnicalMastering the Technical
ChallengesChallenges
Understanding the characteristics ofUnderstanding the characteristics of
different transmission mediadifferent transmission media
Understanding network designUnderstanding network design
Understanding network protocolsUnderstanding network protocols
Understanding how users interact with theUnderstanding how users interact with the
networknetwork
Mastering the TechnicalMastering the Technical
ChallengesChallenges
Specialty areas in high demand forSpecialty areas in high demand for
networking professionals:networking professionals:

Network securityNetwork security

Internet and intranet designInternet and intranet design

Network managementNetwork management

Voice/data integrationVoice/data integration

Remote and mobile computingRemote and mobile computing
Mastering the TechnicalMastering the Technical
ChallengesChallenges
Specialty areas in high demand forSpecialty areas in high demand for
networking professionals (cont.):networking professionals (cont.):

Data integrity and fault toleranceData integrity and fault tolerance

In-depth knowledge of Microsoft networkingIn-depth knowledge of Microsoft networking
productsproducts

In-depth knowledge of NetWare networkingIn-depth knowledge of NetWare networking
productsproducts

In-depth knowledge of router configurationIn-depth knowledge of router configuration
and managementand management
Developing Your “Soft Skills”Developing Your “Soft Skills”
Skills not easily measured but important toSkills not easily measured but important to
a networking career:a networking career:

Customer relationsCustomer relations

Oral and written communicationsOral and written communications

DependabilityDependability

TeamworkTeamwork

Leadership abilitiesLeadership abilities
Pursuing CertificationPursuing Certification
CertificationCertification

Process of mastering material pertaining to aProcess of mastering material pertaining to a
particular hardware system, operating system,particular hardware system, operating system,
programming language, or other softwareprogramming language, or other software
program, then proving your mastery by passingprogram, then proving your mastery by passing
a series of examsa series of exams
Computer Technology AssociationComputer Technology Association
(CompTIA)(CompTIA)

An association that sets industry-wideAn association that sets industry-wide
standards for computer professionalsstandards for computer professionals
Pursuing CertificationPursuing Certification
A+A+

Certification established by CompTIACertification established by CompTIA

Verifies knowledge about PC operation,Verifies knowledge about PC operation,
repair, and managementrepair, and management
Microsoft Certified Systems EngineerMicrosoft Certified Systems Engineer
(MCSE)(MCSE)

Certification established by MicrosoftCertification established by Microsoft

Demonstrates in-depth knowledge aboutDemonstrates in-depth knowledge about
Microsoft’s productsMicrosoft’s products
Pursuing CertificationPursuing Certification
Certified NetWare Engineer (CNE)Certified NetWare Engineer (CNE)

Certification established by NovellCertification established by Novell

Demonstrates in-depth understanding ofDemonstrates in-depth understanding of
Novell’s networking softwareNovell’s networking software
Network+ (Net+)Network+ (Net+)

Certification established by CompTIACertification established by CompTIA

Verifies broad, vendor-independentVerifies broad, vendor-independent
networking technology skillsnetworking technology skills
Pursuing CertificationPursuing Certification
Benefits of becoming certified include:Benefits of becoming certified include:

Better salaryBetter salary

Greater opportunitiesGreater opportunities

Professional respectProfessional respect

Access to better supportAccess to better support
Finding a Job in NetworkingFinding a Job in Networking
Search the WebSearch the Web
Read the paperRead the paper
Visit a career centerVisit a career center
NetworkNetwork
Attend career fairsAttend career fairs
Finding a Job in NetworkingFinding a Job in Networking
Table 1-1:
Web sites
with job
databases
Joining ProfessionalJoining Professional
AssociationsAssociations
Benefits can include:Benefits can include:

Connecting with people who have similarConnecting with people who have similar
interestsinterests

Providing new opportunities for learningProviding new opportunities for learning

Allowing access to specialized informationAllowing access to specialized information

Giving you tangible assets such as free goodsGiving you tangible assets such as free goods
Joining ProfessionalJoining Professional
AssociationsAssociations
Table 1-2: Web sites of networking organizations
Chapter SummaryChapter Summary
A Network is a group of computers or otherA Network is a group of computers or other
devices connected by some type ofdevices connected by some type of
transmission mediatransmission media
Networks may be small or large, connectingNetworks may be small or large, connecting
computers in one office or across the worldcomputers in one office or across the world
All networks offer advantages relative to theAll networks offer advantages relative to the
use of standalone computersuse of standalone computers
Simplest form of a network still used todaySimplest form of a network still used today
connects a handful of computers through oneconnects a handful of computers through one
cable and uses peer-to-peer communicationcable and uses peer-to-peer communication
Chapter SummaryChapter Summary
A LAN is a network of computers and otherA LAN is a network of computers and other
devices confined to a relatively small spacedevices confined to a relatively small space
A WAN is a network connecting two or moreA WAN is a network connecting two or more
geographically distinct LANsgeographically distinct LANs
All server-based networks share some commonAll server-based networks share some common
elementselements
The physical layout of a computer network isThe physical layout of a computer network is
called a topologycalled a topology
Network protocols are rules the network uses toNetwork protocols are rules the network uses to
transfer datatransfer data
Chapter SummaryChapter Summary
File and print services provide foundation forFile and print services provide foundation for
networkingnetworking
Communications services allow remote users toCommunications services allow remote users to
connect to the networkconnect to the network
Mail services allow networks users to exchangeMail services allow networks users to exchange
and store e-mailand store e-mail
Internet services enable organizations to connectInternet services enable organizations to connect
to the Internetto the Internet
Network management services centrallyNetwork management services centrally
administer and simplify complicated managementadminister and simplify complicated management
tasks on networktasks on network
Chapter SummaryChapter Summary
Networking professionals are in demandNetworking professionals are in demand
Pursuing certification can benefit you inPursuing certification can benefit you in
many waysmany ways
Hone your soft skillsHone your soft skills
Numerous resources are available inNumerous resources are available in
searching for networking positionssearching for networking positions
Joining associations can benefit yourJoining associations can benefit your
professional growthprofessional growth

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Introduction to networking

  • 1. Chapter OneChapter One An IntroductionAn Introduction to Networkingto Networking
  • 2. ObjectivesObjectives List advantages of networked computingList advantages of networked computing relative to standalone computingrelative to standalone computing Identify elements of a networkIdentify elements of a network Describe several specific uses of aDescribe several specific uses of a networknetwork
  • 3. ObjectivesObjectives Distinguish between client/server andDistinguish between client/server and peer-to-peer networkspeer-to-peer networks Identify some of the certifications availableIdentify some of the certifications available to networking professionalsto networking professionals Identify kinds of non-technical, or “soft,”Identify kinds of non-technical, or “soft,” skills to help in succeeding as askills to help in succeeding as a networking professionalnetworking professional
  • 4. Networks and StandaloneNetworks and Standalone ComputersComputers NetworkNetwork  Group of computers and other devicesGroup of computers and other devices connected by some type of transmissionconnected by some type of transmission mediamedia  Networks enable users to share devices andNetworks enable users to share devices and data, collectively called a network’sdata, collectively called a network’s resourcesresources Standalone computerStandalone computer  Uses programs and data only from its localUses programs and data only from its local disks and is not connected to a networkdisks and is not connected to a network
  • 5. SneakernetSneakernet Method of sharing data by copying it to a diskMethod of sharing data by copying it to a disk and carrying the disk from computer to computerand carrying the disk from computer to computer Figure 1-1: Data sharing before the advent of networks
  • 6. Local and Remote ComputersLocal and Remote Computers Local computerLocal computer  Computer on which user is workingComputer on which user is working Remote computerRemote computer  Computer that user controls or works on viaComputer that user controls or works on via network connectionnetwork connection
  • 7. Peer-to-Peer NetworkPeer-to-Peer Network Computers communicate on single segment of cable andComputers communicate on single segment of cable and share each other’s data and devicesshare each other’s data and devices Simple example of a local area network (LAN)Simple example of a local area network (LAN) Figure 1-2: Simple peer-to-peer network
  • 8. Local Area Network (LAN)Local Area Network (LAN) Network of computers and other devicesNetwork of computers and other devices confined to relatively small spaceconfined to relatively small space LANs involving many computers areLANs involving many computers are usually server-basedusually server-based  On aOn a server-based networkserver-based network, special, special computers (known ascomputers (known as serversservers) process data) process data for and facilitate communication betweenfor and facilitate communication between other computers on the network (known asother computers on the network (known as clientsclients))
  • 9. Networking BasicsNetworking Basics WorkstationWorkstation  Computer that typically runs a desktopComputer that typically runs a desktop operating system and connects to aoperating system and connects to a networknetwork Client/server architectureClient/server architecture  Networking model in which clients useNetworking model in which clients use central server to share applications,central server to share applications, devices, and datadevices, and data
  • 10. Networking BasicsNetworking Basics Client/server networkClient/server network  Network based on client/server architectureNetwork based on client/server architecture Network operating systemNetwork operating system  Special software designed to manage dataSpecial software designed to manage data and other resources on a server for a numberand other resources on a server for a number of clientsof clients
  • 11. Networking BasicsNetworking Basics Figure 1-3: LAN with a file server
  • 12. Networking BasicsNetworking Basics Figure 1-4: An example of a complex network
  • 13. Advantages of Server-BasedAdvantages of Server-Based over Peer-to-Peer Networksover Peer-to-Peer Networks User login accounts and passwords can beUser login accounts and passwords can be assigned in one placeassigned in one place Access to multiple shared resources can beAccess to multiple shared resources can be centrally grantedcentrally granted Servers are optimized to handle heavyServers are optimized to handle heavy processing loads and dedicated to handlingprocessing loads and dedicated to handling requests from clientsrequests from clients Servers can connect more than a handful ofServers can connect more than a handful of computerscomputers
  • 14. MANs and WANsMANs and WANs Metropolitan area network (MAN)Metropolitan area network (MAN)  Network connecting clients and servers inNetwork connecting clients and servers in multiple buildings within limited geographicmultiple buildings within limited geographic areaarea Wide area network (WAN)Wide area network (WAN)  Network that spans large distance andNetwork that spans large distance and connects two or more LANsconnects two or more LANs  TheThe InternetInternet is an example of a veryis an example of a very intricate and extensive WAN that spans theintricate and extensive WAN that spans the globeglobe
  • 16. Elements Common to AllElements Common to All Server-Based NetworksServer-Based Networks ClientClient  In addition to referring to a computer on theIn addition to referring to a computer on the network, may also refers to humannetwork, may also refers to human useruser ofof client workstationclient workstation ServerServer WorkstationWorkstation Network interface card (NIC)Network interface card (NIC)  Enables workstation to connect to the networkEnables workstation to connect to the network and communicate with other computersand communicate with other computers
  • 17. Elements Common to AllElements Common to All Server-Based NetworksServer-Based Networks Figure 1-6: A network interface card (NIC)
  • 18. Network operating system (NOS)Network operating system (NOS) HostHost  Server that manages shared resourcesServer that manages shared resources NodeNode  Client, server, or other device that canClient, server, or other device that can communicate over a network and that iscommunicate over a network and that is identified by a unique identifying number,identified by a unique identifying number, known as its network addressknown as its network address Elements Common to AllElements Common to All Server-Based NetworksServer-Based Networks
  • 19. Elements Common to AllElements Common to All Server-Based NetworksServer-Based Networks TopologyTopology  PhysicalPhysical layout oflayout of computercomputer networknetwork Figure 1-7: Commonly used network topologies
  • 20. Elements Common to AllElements Common to All Server-Based NetworksServer-Based Networks ProtocolProtocol  Rules network uses to transfer dataRules network uses to transfer data Data PacketsData Packets  The distinct units of data transmitted from oneThe distinct units of data transmitted from one computer to another on a networkcomputer to another on a network
  • 21. Elements Common to AllElements Common to All Server-Based NetworksServer-Based Networks AddressingAddressing  Scheme for assigning unique identifyingScheme for assigning unique identifying number to every workstation on networknumber to every workstation on network  The number that uniquely identifies eachThe number that uniquely identifies each workstation and device on a network is itsworkstation and device on a network is its addressaddress
  • 22. Elements Common to AllElements Common to All Server-Based NetworksServer-Based Networks TransmissionTransmission mediamedia  MeansMeans throughthrough which datawhich data areare transmittedtransmitted and receivedand received Figure 1-8: Examples of network transmission media
  • 23. How Networks Are UsedHow Networks Are Used ServicesServices  Features provided by a networkFeatures provided by a network File and print servicesFile and print services Communications servicesCommunications services Mail servicesMail services Internet servicesInternet services Management servicesManagement services
  • 24. Network ServicesNetwork Services File servicesFile services  Refers to capability of a server to share dataRefers to capability of a server to share data files, applications, and disk storage spacefiles, applications, and disk storage space  Server that provides file services is called aServer that provides file services is called a file serverfile server Print servicesPrint services  Allows printers to be shared by several usersAllows printers to be shared by several users on a networkon a network
  • 25. Network ServicesNetwork Services Communications servicesCommunications services  Allow remote users to connect to a networkAllow remote users to connect to a network Remote userRemote user  Person working on a computer in a differentPerson working on a computer in a different geographical location from the LAN’s servergeographical location from the LAN’s server  Communications serverCommunications server Server that runs communications servicesServer that runs communications services Also referred to asAlso referred to as access serversaccess servers andand remoteremote access serversaccess servers
  • 26. Network ServicesNetwork Services Mail servicesMail services  Coordinate storage and transfer of e-mailCoordinate storage and transfer of e-mail between users on a networkbetween users on a network GatewayGateway  Combination of software and hardware enabling twoCombination of software and hardware enabling two different kinds of networks to exchange datadifferent kinds of networks to exchange data Internet servicesInternet services  Enable networks to communicate with theEnable networks to communicate with the InternetInternet
  • 27. Network ServicesNetwork Services Management servicesManagement services  Centrally administer and simplify complicatedCentrally administer and simplify complicated management tasks on the networkmanagement tasks on the network  Numerous services fall under category ofNumerous services fall under category of network managementnetwork management
  • 28. Important ManagementImportant Management ServicesServices Traffic monitoring and controlTraffic monitoring and control  TrafficTraffic Data transmission and processing activity takingData transmission and processing activity taking place on a computer network at any given timeplace on a computer network at any given time  SegmentSegment Part of LAN that is logically separated from otherPart of LAN that is logically separated from other parts of LAN and that shares fixed amount ofparts of LAN and that shares fixed amount of traffic capacitytraffic capacity
  • 29. Important ManagementImportant Management ServicesServices Load balancingLoad balancing  Distributing process activity evenly across aDistributing process activity evenly across a network so that no single device isnetwork so that no single device is overwhelmedoverwhelmed Hardware diagnosis and failure alertHardware diagnosis and failure alert  Determining when a network componentDetermining when a network component fails and automatically notifying networkfails and automatically notifying network administrators through e-mail or pageradministrators through e-mail or pager
  • 30. Important ManagementImportant Management ServicesServices Asset managementAsset management  Collecting and storing data on number andCollecting and storing data on number and types of software and hardware assets in antypes of software and hardware assets in an organization’s networkorganization’s network License trackingLicense tracking  Determining how many copies of a singleDetermining how many copies of a single application are currently in use on a networkapplication are currently in use on a network
  • 31. Important ManagementImportant Management ServicesServices Security auditingSecurity auditing  Evaluating what security measures areEvaluating what security measures are currently in force and notifying networkcurrently in force and notifying network administrator if a security breach occursadministrator if a security breach occurs Software distributionSoftware distribution  Automatically transferring data file or programAutomatically transferring data file or program from the server to a client on the networkfrom the server to a client on the network
  • 32. Important ManagementImportant Management ServicesServices Address managementAddress management  Centrally administering a finite number ofCentrally administering a finite number of network addresses for an entire LANnetwork addresses for an entire LAN Backup and restoration of dataBackup and restoration of data  Backing upBacking up Copying critical files to a secure storage areaCopying critical files to a secure storage area  RestoringRestoring Retrieving data if original files are lost or deletedRetrieving data if original files are lost or deleted
  • 33. Becoming a NetworkBecoming a Network ProfessionalProfessional Mastering the technical challengesMastering the technical challenges Developing your “soft skills”Developing your “soft skills” Pursuing certificationPursuing certification Finding a job in networkingFinding a job in networking Joining professional associationsJoining professional associations
  • 34. Mastering the TechnicalMastering the Technical ChallengesChallenges Installing, configuring, and troubleshootingInstalling, configuring, and troubleshooting network server softwarenetwork server software Installing, configuring, and troubleshootingInstalling, configuring, and troubleshooting network server hardwarenetwork server hardware Installing, configuring, and troubleshootingInstalling, configuring, and troubleshooting network client softwarenetwork client software Installing, configuring, and troubleshootingInstalling, configuring, and troubleshooting network client hardwarenetwork client hardware
  • 35. Mastering the TechnicalMastering the Technical ChallengesChallenges Understanding the characteristics ofUnderstanding the characteristics of different transmission mediadifferent transmission media Understanding network designUnderstanding network design Understanding network protocolsUnderstanding network protocols Understanding how users interact with theUnderstanding how users interact with the networknetwork
  • 36. Mastering the TechnicalMastering the Technical ChallengesChallenges Specialty areas in high demand forSpecialty areas in high demand for networking professionals:networking professionals:  Network securityNetwork security  Internet and intranet designInternet and intranet design  Network managementNetwork management  Voice/data integrationVoice/data integration  Remote and mobile computingRemote and mobile computing
  • 37. Mastering the TechnicalMastering the Technical ChallengesChallenges Specialty areas in high demand forSpecialty areas in high demand for networking professionals (cont.):networking professionals (cont.):  Data integrity and fault toleranceData integrity and fault tolerance  In-depth knowledge of Microsoft networkingIn-depth knowledge of Microsoft networking productsproducts  In-depth knowledge of NetWare networkingIn-depth knowledge of NetWare networking productsproducts  In-depth knowledge of router configurationIn-depth knowledge of router configuration and managementand management
  • 38. Developing Your “Soft Skills”Developing Your “Soft Skills” Skills not easily measured but important toSkills not easily measured but important to a networking career:a networking career:  Customer relationsCustomer relations  Oral and written communicationsOral and written communications  DependabilityDependability  TeamworkTeamwork  Leadership abilitiesLeadership abilities
  • 39. Pursuing CertificationPursuing Certification CertificationCertification  Process of mastering material pertaining to aProcess of mastering material pertaining to a particular hardware system, operating system,particular hardware system, operating system, programming language, or other softwareprogramming language, or other software program, then proving your mastery by passingprogram, then proving your mastery by passing a series of examsa series of exams Computer Technology AssociationComputer Technology Association (CompTIA)(CompTIA)  An association that sets industry-wideAn association that sets industry-wide standards for computer professionalsstandards for computer professionals
  • 40. Pursuing CertificationPursuing Certification A+A+  Certification established by CompTIACertification established by CompTIA  Verifies knowledge about PC operation,Verifies knowledge about PC operation, repair, and managementrepair, and management Microsoft Certified Systems EngineerMicrosoft Certified Systems Engineer (MCSE)(MCSE)  Certification established by MicrosoftCertification established by Microsoft  Demonstrates in-depth knowledge aboutDemonstrates in-depth knowledge about Microsoft’s productsMicrosoft’s products
  • 41. Pursuing CertificationPursuing Certification Certified NetWare Engineer (CNE)Certified NetWare Engineer (CNE)  Certification established by NovellCertification established by Novell  Demonstrates in-depth understanding ofDemonstrates in-depth understanding of Novell’s networking softwareNovell’s networking software Network+ (Net+)Network+ (Net+)  Certification established by CompTIACertification established by CompTIA  Verifies broad, vendor-independentVerifies broad, vendor-independent networking technology skillsnetworking technology skills
  • 42. Pursuing CertificationPursuing Certification Benefits of becoming certified include:Benefits of becoming certified include:  Better salaryBetter salary  Greater opportunitiesGreater opportunities  Professional respectProfessional respect  Access to better supportAccess to better support
  • 43. Finding a Job in NetworkingFinding a Job in Networking Search the WebSearch the Web Read the paperRead the paper Visit a career centerVisit a career center NetworkNetwork Attend career fairsAttend career fairs
  • 44. Finding a Job in NetworkingFinding a Job in Networking Table 1-1: Web sites with job databases
  • 45. Joining ProfessionalJoining Professional AssociationsAssociations Benefits can include:Benefits can include:  Connecting with people who have similarConnecting with people who have similar interestsinterests  Providing new opportunities for learningProviding new opportunities for learning  Allowing access to specialized informationAllowing access to specialized information  Giving you tangible assets such as free goodsGiving you tangible assets such as free goods
  • 47. Chapter SummaryChapter Summary A Network is a group of computers or otherA Network is a group of computers or other devices connected by some type ofdevices connected by some type of transmission mediatransmission media Networks may be small or large, connectingNetworks may be small or large, connecting computers in one office or across the worldcomputers in one office or across the world All networks offer advantages relative to theAll networks offer advantages relative to the use of standalone computersuse of standalone computers Simplest form of a network still used todaySimplest form of a network still used today connects a handful of computers through oneconnects a handful of computers through one cable and uses peer-to-peer communicationcable and uses peer-to-peer communication
  • 48. Chapter SummaryChapter Summary A LAN is a network of computers and otherA LAN is a network of computers and other devices confined to a relatively small spacedevices confined to a relatively small space A WAN is a network connecting two or moreA WAN is a network connecting two or more geographically distinct LANsgeographically distinct LANs All server-based networks share some commonAll server-based networks share some common elementselements The physical layout of a computer network isThe physical layout of a computer network is called a topologycalled a topology Network protocols are rules the network uses toNetwork protocols are rules the network uses to transfer datatransfer data
  • 49. Chapter SummaryChapter Summary File and print services provide foundation forFile and print services provide foundation for networkingnetworking Communications services allow remote users toCommunications services allow remote users to connect to the networkconnect to the network Mail services allow networks users to exchangeMail services allow networks users to exchange and store e-mailand store e-mail Internet services enable organizations to connectInternet services enable organizations to connect to the Internetto the Internet Network management services centrallyNetwork management services centrally administer and simplify complicated managementadminister and simplify complicated management tasks on networktasks on network
  • 50. Chapter SummaryChapter Summary Networking professionals are in demandNetworking professionals are in demand Pursuing certification can benefit you inPursuing certification can benefit you in many waysmany ways Hone your soft skillsHone your soft skills Numerous resources are available inNumerous resources are available in searching for networking positionssearching for networking positions Joining associations can benefit yourJoining associations can benefit your professional growthprofessional growth