Living OnlineIC3

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

Peer-to-Peer

No Server

All PCs share resourcesHome network

LAN & WANLANLocal area networkCommon location

WANWide area networkNetworks connected in distant locations

Network BenefitsShare information

Share hardware devicesPrinters, scanners

Communication/ collaboration

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

Router

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

Dial-UpTelephone lines

Slow

56kbps (56k)

BroadbandCable, ADSL, SatelliteFast, 1.5Mbps 16Mbps or more!DedicatedDownload/Upload speeds are different Networked computers use it

Speed Differences

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 address?smurray@ibm.com

Whats the Web Site?You know a guy named Bills email addressbillg@gcsssd.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 address?raquel@mtv.comraquel@mtv.orgrbruno@mtv.govrbruno@musictv.net

Outlook

AddressingCC:

BC:

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)

Review Handout

Receiving Email

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

Handling Emails

Other Messaging

OnlineDue Date:

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

Choose One

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

Whats This?

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

Phishing

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

URL

Which are from the same place?bob@qvc.comsally@vqc.comharry@qvc.orgpat@qvc.edularry@qvc.commoe@qvc.gov

HTML Example

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 SiteAuthorityCredentials; who is responsible for site?Way to contact themAccuracyCite sources?Relevant linksSpelling/grammarBiasTowards one point of viewCurrencyIs it up to date, currentDesignWell organized or cluttered?

Internet SearchesIC3- Living Online

Search EnginesHave databases of sites & keywordsEach generates a list of resultsWeb spider or crawlerResults may vary between enginesGo to yahoo.com & search for great wall of chinaNotice 1st resultHow many total hits?Go to google.com & do same searchDifferent result for #1How many total hits?

Searching all enginesGo to mamma.comSearch for merry melodies cartoonsResults show which engines they are registered withGo to dogpile.comLow carb dietsTells where it searched & found on

Narrowing your searchQuotation MarksYellow tuna would find matches w/ either word or both

Yellow Tuna would look for that phrase

Yellow tuna- no quotes

Yellow tuna- with quotes

Narrowing your searchPlus & Minus Signs+ include keywords- exclude keywordsUse the advanced search functionBooleanAND, OR, NOT, NEARRecipes AND Chicken AND SpaghettiNBA OR BasketballNEAR- within 10 wordsNOT- Tennis AND NOT Wimbledon

+ Sign

- Sign

Advanced Search

Security & Privacy OnlineIC3- Living Online

SafeguardingElectrical Failure/DisasterSecure power cords so they cant be accidentally unpluggedUPSSurge ProtectorSave files oftenBack up files regularlyMaybe off site too

Computer CrimeA criminal act committed through use of a computerAccessing someone elses system & changing infoCreating a virus & causing damageUsing a program improperly to obtain private infoHarassment/stalkingCopyright violations

Computer Fraud & HackingFraud- Manipulation of data to obtain money, property or value dishonestly or to cause lossStealing money from bank accountsObtaining false infoPhishingHackingInvading someone elses computerFor personal gain or fun

Top Scams

Fraud Statistics

Fraud Statistics

VirusesProgram that causes corruption of dataExecutable file (runs like a program)Spreads from file to fileCan be major or minorWormMake many copies of itself & uses system resources to slow system downTime BombA virus that causes damage at a certain date, time, or after a # of boots

VirusesTrojan HorseA virus that does something different than it looks like its doingAn example of a Trojan horse would be a program named "waterfalls.scr" claiming to be a free waterfall screensaver which, when run, instead would allow access to the user's computer remotely.

Protect Your ComputerAntivirus softwareUp to dateCareful opening attachmentsScan disks firstSet AV to scan email & attachments

Security & Privacy Online- Part 2IC3- Living Online

Security IssuesUse passwords to protect accessMix casesUse numbers & lettersAdd punctuationNo shared passwordsNo sheet of passwordsWeb Secret Credit CardBiometric readerFingerprint, retina, voice pattern

Biometric

Software PiracyIllegal copying or use of programsLicense # or key

SharewareTrial periodFreewareWatch out for tracking!!!

Web Bugs & Protecting PrivacyWeb BugHidden image in banner ads (1 pixel)Browser displays the ad & hidden imageImage places a cookie on HDTracks visits from sites w/ their banner adsBlock 3rd party cookiesDelete cookiesRead sites privacy policy

Block 3rd Party Cookies

Protecting PrivacyAdwareRead license agreement of softwareSome allow other programs to install to track browsing & transmit to a serverSpywareBeyond adwareRuns in backgroundGathers info about computerAd-aware, SpyBot, etc.

EULA

Living OnlineIC3

TWP- least expensive, has one for data and another for ground and interference; Coax from cable companies with shielding for interference; fiber is most expensive, little bend but the fastest; wireless is line of sight