living online ic3. networks & telecommunication ic3- living online
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Networks & TelecommunicationIC3- Living Online
What is a Network?2 or more devices connected together
Client-ServerClient-ServerSchool or Large BusinessServer(s) as dedicated resources to client PCsPrint, Web, File Storage
All PCs share resourcesHome network
LAN & WANLANLocal area networkCommon location
WANWide area networkNetworks connected in distant locations
Network BenefitsShare information
Share hardware devicesPrinters, scanners
Centralized servicesStorage of files, web, mail
Network DisadvantagesCan you think of any disadvantages?DependencyExpensiveSecurity riskLoss of privacyViruses
Communications MediaWhat does data transmit on?
Twisted-Pair CableCoaxial CableFiber-Optic CableWirelessSatellite
Network HardwareModemBits per second56kbps
NIC (Ethernet Card)
Cable/DSL Modem1.5Mbps 16Mbps
Network DevicesRouterConnects networksRoutes traffic to/from networks or InternetSwitchConnects devices within networkFaster & smarter than hubHubSimple deviceSlow
NetworksNeed Network OS tooRuns on serverAdmin, security, file & print servicesNovell
ReviewTrue or FalseCoax cable is the most expensive.
Fiber optic cable is made from flexible glass tubing.
Sharing software is a benefit of networking.
ReviewThe least expensive type of cable isTwisted pairWhat device changes analog signals to digital & reverse?ModemWhich networking device connects many computers to share one Internet connection?Router
The InternetMany connected networks
WANs connected together
Designed from DoD
No one owns the Internet
Accessing the InternetISPComcast, Verizon DSLOnline ServiceAOL
How to ConnectNeed an ISP or Online ServiceConnection to themTelephone linesCableSatelliteModemBrowser or Software
Connecting to the InternetModemChanges analog to digital & reverseCan be internal or external
Dial-UpOccasional connectBroadbandAlways on connectWi-FiWireless
BroadbandCable, ADSL, SatelliteFast, 1.5Mbps 16Mbps or more!DedicatedDownload/Upload speeds are different Networked computers use it
Online CurriculumC1.1 C1.10C1.2 RS Topics 2, 6-8Skip C1.4, C1.5, C1.9
ReviewA _____ is a network over a small area.LANAsynchronous means the speeds areDifferent download and upload8Mbps download/ 1.5Mbps uploadWhich connection is the slowest?Dial-up, 56kbpsDescribe a network.Two or more devices connected together
ReviewWho owns the Internet?No oneWhat does an ISP do?Connects you to the Internetfor a price!
Intranet & ExtranetIntranetUsed within a businessHas internal documents, forms, HR info, etcUses a browserCant be accessed outside of networkExtranetAllows outside user to access internal infoUses browserNeeds username/password
Online & HomeworkOnline C1.11- C1.12Take the Quiz on C1.13 until you score a 100
Look up and describe what a computer firewall isWrite 2-3 sentences about what it doesName 2-3 pieces of firewall software
Email & Effective CommunicationIC3- Living Online
Email & CommunicationName some email programs
Email advantages?Speed, Cost, Easy Access, Share Info/Collaborate
Web Access (Gmail) or Program (Outlook)
Standard featuresRead, send, attach files
How Email Works
Understanding an Email AddressMailbox NameDomain NameDomain Category
Whats the Email Address?Samantha Murray works for IBMIBMs web site is www.ibm.comSams username is smurray
What would be her email email@example.com
Whats the Web Site?You know a guy named Bills email firstname.lastname@example.orgYou cant remember where he works
What would be the web site to find out the companys name?www.gcsssd.org
Which is Correct?Raquel works at MTVMTVs web site is www.mtv.comWhich could be her email email@example.com@firstname.lastname@example.org@musictv.net
Accessing EmailEmail Program on PC
Web Based Email like Comcast or Google
Cell or PDA
TeknimediaC2.1- C2.7C2.2 RS (Only read Advantages & Accessing)
Sending EmailTo, From, Subject, CC, Body, BC
Use Address Book
SubjectBrief & Descriptive
Add Attachment or add in a web link (URL)
Spell Check & check email address
Teknimedia C2.8 - C2.24
Take the quiz on C2.13 & C2.24 until you score a 100.
Your MessageWeb pagesIf page updates frequently, just give the link to site
A reply shows original message, indicated by >> marks
More on EmailOptions after reading: Reply, Forward, Save, Delete
More on EmailIf you get a can not be delivered message, what should you try first?
Attachment size may be limited on either end
Document may not be legal without a handwritten signature
Special Email FeaturesAdding formatting of text (Bold, etc)May not work if they are using diff email programAutomatic message responsesOut of officeForwards to another emailBlock senders listJunk folder
Professional Email EtiquetteInclude a subjectBrief yet descriptive enoughTry to keep to 1 subjectKeep message shortAvoid ALL CAPS!Limit jokes, symbols :-oProofread before sendingDouble check the addressesDONT EMBARRASS YOURSELF!Email sent through company is NOT private
ReviewWhat is cc?What is bcc?Which is faster, Email or IM?
Due Date: 02/04/2008 Teknimedia C2.25 - C2.38 is due to be completed. Take the quiz on C2.38 until you score a 100.
Unwanted EmailIC3- Living Online
SpamUnwanted e-mail, specifically unsolicited bulk e-mail.
Typically, an e-mail message is sent to multiple recipients who did not ask to receive it.
E-mail messagesare not considered spam if a user has signed up to receive them.
Spam FactsEstimated 80% of email is spam1978 - An e-mail spam is sent to 600 addresses1994 - First large-scale spam sent to 6000 newsgroups, reaching millions of people. 2005 - 30 billion per day 2006 - 55 billion per day
Circle of Spam
Prevent SpamKeep anti-virus up to dateDont forward suspect emailsIgnore the virus warning emailReport spam to admin to be blockedDont open attachment from people you dont know
HoaxesEmail that tried to convince you to delete a file (it was needed)Also told you to warn everyoneGet money from youPhishing- steals your personal infoSpoofed sites & emailsEmails that appear to come from original sourceAsks you to change passwordLink takes you to copied siteUser collects your info
Differences between Spam & PhishingHow does it arrive?Spam: Sneaks in the back door Phishing: Walks in the front door How does it make its offer?Spam: Looks bad, seems far-fetched Phishing: Looks plausible, seems credible What is it trying to do?Spam: Tries to sell you something Phishing: Tries to steal something from you
ReviewWhats worse, spam or phishing?
Internet EssentialsIC3- Living Online
Background of Internet1962, Cold WarUS wanted to connect labsWanted it reliable; not easily destroyedJCR Licklider of MIT wrote the conceptsARPANET (Advanced Research Project Agency)Breaks into small packetsPackets sent using any available connectionArrive at destination; reassembled; put in order; request resend if necessaryTCP/IP
BackboneMajor telecommunication companies handle the high-speed backbone
ISPs connect to backbone
You connect to ISP
Verizon Map- Global
Verizon Map- IP NA
Browsing the WebIC3- Living Online
TermsHTTPRules of how info is packed & transmitted between web serversURL HTMLLang. that makes up a web pageFTPUsed to transfer/download files from a file serverUpload, DownloadHyperlink
Which are from the same email@example.com@firstname.lastname@example.org@email@example.com@qvc.gov
CookiesSmall text fileStored on your HDContains customer id infoPersonalizes your web visitWhen you visit the site, the ID# in cookie is sent to web site to look up history of your past visitsProfiles are formed from your activitiesMany sites require cookies
Cookies for AdsHosting the banner images on its servers and using third-party cookies, the advertising company is able to track the browsing of users across these two sites.
Browser & Cookies
Plug-Ins & Pop-UpsPlug-InProgram downloaded to allow viewing of an item on web siteAdobe ReaderMacromedia FlashPop-Up AdsAppear in separate or same windowAnnoying; not dangerousUpdate IE/browser or Windows XP SP2 or add in blocking software
Secure & Unsecure SitesPassword DOES NOT mean secure
Secure Socket Layer (SSL)Encrypts the data (credit card #s, etc.)URL will begin with https://
Log Off after leaving siteWhy?
Online CurriculumC1.14-C1.22 including quizGet 100 on the quiz
Evaluating a SiteAuth