peer-to-peer network
DESCRIPTION
Peer-to-Peer Network. Computers communicate on single segment of cable and share each other’s data and devices Simple example of a local area network (LAN). Figure 1-2: Simple peer-to-peer network. Peer-to-Peer Network. Simple to configure and require little expertise - PowerPoint PPT PresentationTRANSCRIPT
Peer-to-Peer NetworkPeer-to-Peer Network
Computers communicate on single segment of cable and Computers communicate on single segment of cable and share each other’s data and devicesshare each other’s data and devicesSimple example of a local area network (LAN)Simple example of a local area network (LAN)
Figure 1-2: Simple peer-to-peer network
Peer-to-Peer NetworkPeer-to-Peer Network
Simple to configure and require little Simple to configure and require little expertiseexpertise
Less expensive than other setupsLess expensive than other setups
Not very flexible solutionNot very flexible solution
Net very secure solutionNet very secure solution
Not very practical for connecting more Not very practical for connecting more than a few computersthan a few computers
Does not require NOSDoes not require NOS
Advantages of Server-Based Advantages of Server-Based over Peer-to-Peer Networksover Peer-to-Peer Networks
User login accounts and passwords can be User login accounts and passwords can be assigned in one placeassigned in one place
Access to multiple shared resources can be Access to multiple shared resources can be centrally grantedcentrally granted
Servers are optimized to handle heavy Servers are optimized to handle heavy processing loads and dedicated to handling processing loads and dedicated to handling requests from clientsrequests from clients
Servers can connect more than a handful of Servers 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 in Network connecting clients and servers in
multiple buildings within limited geographic multiple buildings within limited geographic areaarea
Wide area network (WAN)Wide area network (WAN) Network that spans large distance and Network that spans large distance and
connects two or more LANsconnects two or more LANs The The InternetInternet is an example of a very intricate is an example of a very intricate
and extensive WAN that spans the globeand extensive WAN that spans the globe
Elements Common to AllElements Common to AllServer-Based NetworksServer-Based Networks
ClientClient In addition to referring to a computer on the In addition to referring to a computer on the
network, may also refers to human network, may also refers to human useruser of of client workstationclient workstation
ServerServerWorkstationWorkstationNetwork interface card (NIC)Network interface card (NIC) Enables workstation to connect to the network Enables workstation to connect to the network
and communicate with other computersand communicate with other computers
Elements Common to AllElements Common to AllServer-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 can Client, server, or other device that can
communicate over a network and that is communicate 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 AllServer-Based NetworksServer-Based Networks
Elements Common to AllElements Common to AllServer-Based NetworksServer-Based Networks
TopologyTopology Physical layout Physical layout
of computer of computer networknetwork
More detail in More detail in Ch. 5Ch. 5
Figure 1-7: Commonly used network topologies
Elements Common to AllElements Common to AllServer-Based NetworksServer-Based Networks
ProtocolProtocol Rules network uses to transfer dataRules network uses to transfer data Ensures data are transferred whole, in Ensures data are transferred whole, in
sequence, and without error (Ch. 3)sequence, and without error (Ch. 3)
Data PacketsData Packets The distinct units of data transmitted from one The distinct units of data transmitted from one
computer to another on a network (Ch. 2/3)computer to another on a network (Ch. 2/3)
Elements Common to AllElements Common to AllServer-Based NetworksServer-Based Networks
AddressingAddressing Scheme for assigning unique identifying Scheme for assigning unique identifying
number to every workstation on networknumber to every workstation on network The number that uniquely identifies each The number that uniquely identifies each
workstation and device on a network is its workstation and device on a network is its address address (Ch. 2/3)(Ch. 2/3)
Elements Common to AllElements Common to AllServer-Based NetworksServer-Based Networks
Transmission Transmission mediamedia Means Means
through which through which data are data are transmitted transmitted and receivedand received
More detail in More detail in Ch. 4Ch. 4
Figure 1-8: Examples of network transmission media
How Networks Are UsedHow Networks Are Used
ServicesServices Features provided by a network – most visible Features provided by a network – most visible
is e-mailis e-mailFile and print services File and print services
Communications services (RAS)Communications services (RAS)
Mail servicesMail services
Internet servicesInternet services
Management servicesManagement services
Network ServicesNetwork Services
File servicesFile services Refers to capability of a server to share data Refers 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 a Server that provides file services is called a
file serverfile server
Print servicesPrint services Allows printers to be shared by several users Allows 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 different Person working on a computer in a different
geographical location from the LAN’s servergeographical location from the LAN’s server Win 2K – Remote Access Server (RAS)Win 2K – Remote Access Server (RAS) Netware – Network Access Server (NAS)Netware – Network Access Server (NAS)
Communications serverCommunications serverServer that runs communications servicesServer that runs communications services
Also referred to as Also referred to as access serversaccess servers and and remote remote access serversaccess servers
Network ServicesNetwork Services
Mail servicesMail services Coordinate storage and transfer of e-mail Coordinate storage and transfer of e-mail
between users on a networkbetween users on a networkMay include a May include a GatewayGateway
Combination of software and hardware enabling two Combination 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 the Enable networks to communicate with the
InternetInternet
Network ServicesNetwork Services
Management servicesManagement services Centrally administer and simplify complicated Centrally administer and simplify complicated
management tasks on the networkmanagement tasks on the network Numerous services fall under category of Numerous services fall under category of
network managementnetwork management
Important Management Important Management ServicesServices
Traffic monitoring and controlTraffic monitoring and control TrafficTraffic
Data transmission and processing activity taking Data transmission and processing activity taking place on a computer network at any given timeplace on a computer network at any given time
SegmentSegmentPart of LAN that is logically separated from other Part of LAN that is logically separated from other parts of LAN and that shares fixed amount of parts of LAN and that shares fixed amount of traffic capacitytraffic capacity
Important Management Important Management ServicesServices
Load balancingLoad balancing Distributing process activity evenlyDistributing process activity evenly across a across a
network so that no single device is network so that no single device is overwhelmedoverwhelmed
Hardware diagnosis and failure alertHardware diagnosis and failure alert Determining when a network component Determining when a network component
fails and automatically notifying network fails and automatically notifying network administrators through e-mail or pageradministrators through e-mail or pager
Important Management Important Management ServicesServices
Asset managementAsset management Collecting and storing dataCollecting and storing data on number and on number and
types of software and hardware assets in an types of software and hardware assets in an organization’s networkorganization’s network
License trackingLicense tracking Determining how many copies of a single Determining how many copies of a single
application are currently in use on a networkapplication are currently in use on a network
Important Management Important Management ServicesServices
Security auditingSecurity auditing Evaluating Evaluating what security measures are what security measures are
currently in forcecurrently in force and notifying network and notifying network administrator if a security breach occursadministrator if a security breach occurs
Software distributionSoftware distribution Automatically transferring data file or program Automatically transferring data file or program
from the server to a client on the networkfrom the server to a client on the network
Important Management Important Management ServicesServices
Address managementAddress management Centrally administering a finite number of Centrally 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
Covered more in depth in Ch. 12/13Covered more in depth in Ch. 12/13
Becoming a Network Becoming 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 Technical Mastering the Technical ChallengesChallenges
Specialty areas in high demand for Specialty areas in high demand for networking professionals:networking professionals: Network securityNetwork security Internet and intranet designInternet and intranet design Network managementNetwork management Voice/data integration (VoIP)Voice/data integration (VoIP) Remote and mobile computingRemote and mobile computing
Mastering the Technical Mastering the Technical ChallengesChallenges
Specialty areas in high demand for Specialty 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 networking In-depth knowledge of Microsoft networking
productsproducts In-depth knowledge of NetWare networking In-depth knowledge of NetWare networking
products (decreasing)products (decreasing) In-depth knowledge of router configuration In-depth knowledge of router configuration
and management (Cisco)and management (Cisco)
Developing Your “Soft Skills”Developing Your “Soft Skills”
Skills not easily measured but important to Skills 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 a Process of mastering material pertaining to a
particular hardware system, operating system, particular hardware system, operating system, programming language, or other software programming language, or other software program, then proving your mastery by passing program, then proving your mastery by passing a series of examsa series of exams
Computer Technology Association Computer Technology Association (CompTIA)(CompTIA) An association that sets industry-wide An association that sets industry-wide
standards for computer professionalsstandards for computer professionals
Pursuing CertificationPursuing CertificationA+ A+ Certification established by CompTIACertification established by CompTIA Verifies knowledge about PC operation, repair, and Verifies knowledge about PC operation, repair, and
managementmanagement
Microsoft Certified Systems Engineer (MCSE)Microsoft Certified Systems Engineer (MCSE) Certification established by MicrosoftCertification established by Microsoft Demonstrates in-depth knowledge about Microsoft’s Demonstrates in-depth knowledge about Microsoft’s
productsproducts
Microsoft Certified Systems Administrator (MCSA)Microsoft Certified Systems Administrator (MCSA) MCSE – designs networks; MCSA – administers MCSE – designs networks; MCSA – administers
networksnetworks
Pursuing CertificationPursuing Certification
Certified NetWare Engineer (CNE)Certified NetWare Engineer (CNE) Certification established by NovellCertification established by Novell Demonstrates in-depth understanding of Demonstrates 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-independent Verifies 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 Good way to “prove” you have at least some Good way to “prove” you have at least some
knowledge of a specific skillknowledge of a specific skill
Degree vs. certification debateDegree vs. certification debate
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
Joining Professional Joining Professional AssociationsAssociations
Benefits can include:Benefits can include: Connecting with people who have similar Connecting 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