bsad 104 network and computer security online communication cloud computing
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BSAD 104Computer Security
Online CommunicationCloud Computing
Types of NetworkTypes of NetworksPeer-to-peer network (P2P)
Connects two or more computers without going through a central server computer
Used in home network or small businessClient-Server Network
Client (user) connects to server (central computer) Server manages disk drives, printers, and network traffic Server holds copy of application program
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Compare Client-Server/P2Pfrom http://www.webexploits.co.uk/2010/03/peer-to-peer-and-effects-on-network_02.html
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Network termsHub is used in local area network (LAN)
network. LAN are not an opened network. Can connect LANs.
Data packet goes to one port on hub and hub copies to all other ports
Hub can be overwhelmed by network traffic as can not direct data packet to hub instead copies everything to all ports, which can slow network traffic
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Network termsSwitch sorts and distributes data packets
between devices in wired setting such as a LAN
Switch costs more than hubRouter routes data packets for both wireless
and wired data and determines most efficient route to take data
Router can also serve as a gateway that connects LANs, WANs and internetRouter can be wireless (antennae) vs. wired
(no antennae)04/09/2023 06:17 PM 5
Images Hub, Switch from (
http://helpdeskgeek.com/networking/router-vs-switch-vs-hub/)
Hub Switch
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Images Wired Router, Wireless Router from http://helpdeskgeek.com/networking/router-vs-switch-vs-hub/ and http://www.google.com/imgres?hl=en&biw=1600&bih=1099&tbm=isch&tbnid=lEGPKVBaG49RvM:&imgrefurl=http://www.bitsy.biz/wired-router-wrt614-p-697.html&docid=86n9QyPTWJZ0rM&imgurl=http://www.bitsy.biz/bizgraphics/RP614.jpg&w=600&h=532&ei=uPczUNrkMOXy8QHtmIFg&zoom=1&iact=hc&vpx=872&vpy=551&dur=337&hovh=181&hovw=209&tx=56&ty=142&sig=106451797350112111161&page=1&tbnh=168&tbnw=197&start=0&ndsp=45&ved=1t:429,r:30,s:0,i:171Wired Router Wireless Router
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Tips for Using Wi-FiDo not log into financial institutions or credit
card accountsDo not automatically save and store
passwordsDisable Wi-Fi when doneWhen setting up wireless network, use a
encryption methodHave firewall on computer (Start/Control
Panel/System and Security/Windows Firewall) and router
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Definitions of VirusesMalware stands for malicious software and
can include the following programsVirus—program that causes harm to computer
Needs human interaction to pass along such as USB drive or email attachment
Worm—copies itself to other computers without your awareness or involvement Attacks networks by slowing them down by using
massive amounts of bandwidth Attacks vulnerabilities in O/S
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Definitions of VirusesMalware stands for malicious software and
can include the following programsTrojan Horse—form of malware that acts as useful
program when not Can’t replicate itself on own but can be very
destructive Copies keystrokes to get into computer system
without knowledgePhishing
E-mail scam that acts from legitimate source (e.g. bank) to gain access to your user account information (e.g. e-mail from bank)
Can use e-mail, social media, online chats, or text messages to gain access to your accounts04/09/2023 06:17 PM 10
Protect Against VirusesUse Anti-virus software like AVG or Microsoft
Security EssentialsUse Anti-virus software that has spyware
protectionHave firewall on your computer and router
onHave virus do deep scan once a week in off
hours as takes long timeDownload files and scan with virus protection
softwareDo not opened attachments from individuals
do not knowStay away for suspicious e-mails or e-mails
from bank
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Other termsCookies—small file saved on your computer
that remembers your login information or shopping preferences for websites
Spam—unwanted emailUsually email software has way to filter into
folder that is junk folderCloud computing—using Internet to host
applications or file storage
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Companies offering Cloud ComputingCompanies offering storage space or file
applicationsGoogle (e.g. Google Docs for application and
store files on Internet)Dropbox—store filesMicrosoft SkydriveAmazon—Cloud Player for music
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E-mail EtiquetteUse Signature LineUse Subject Line so not think a virusUse Proper Greeting at start of message like
Dear Mrs JonesBe conciseDo not use All CapsUse spell checkerProofreadUse humor sparingly
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