COSC CHAPTER 4-6
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Companies can attract prospective employees by setting up job-specific discussion groups and forums on the Web
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true
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All devices connected to the Internet must have a unique IP address.
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True
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Distance education offers students a way of working through class material on a flexible schedule.
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True
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Online travel planning requires you to visit multiple Web sites to book a vacation
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False
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A distinctive advantage of accessing information on the Web is the ability to dig deeper into the subject matter.
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True
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Cloud computing's main task is to provide users with access to remote equipment and environments.
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False
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Safari is an example of a Web browser.
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True
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The private cloud model for cloud computing saves businesses money.
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True
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Internet radio is limited to local stations that surround your current location.
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False
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Podcasts and video podcasts are distributed using CSS technology.
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False / RSS
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The popularity of ____ has encouraged everyday users to share events of the day.
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blog, social media, podcasts,
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To acquire an online presence, you must subscribe to a Web ____ service that will store your files for users to access.
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hosting
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A Web page can be created using Web development software such as ___
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Dreamweaver
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Airlines take advantage of ____ technology to inform users of flight delays and itinerary changes
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smart phone
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A search engine attempts to catalog every Web page by topic through the use of a ____.
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spider
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In a ____ portal, a user can access information related to his or her specific company, including communications tools for collaboration.
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corporate
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It is much easier for people to remember ____ than IP addresses of Web site
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domain names
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In an effort to fight against the illegal downloading of videos and movies, many ____ are working against networks such as BitTorrent.
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ISPs
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Thanks to ____ files, a Web site can recognize you and cater to your individual tastes each time you visit.
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cookie
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A popular financial service on the Web that supports mobile payment transactions is ____.
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PayPal
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Protocols play an important role in defining how telecommunications work.
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True
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Adding a data plan to a standard voice plan is unlikely to increase subscription cost.
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False
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WiMAX requires hundreds, if not thousands, of access points to cover a city.
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False Wifi required it
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Local area networks are privately owned
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True
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GPS technology has become popular in social networking.
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True
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No cabling or hard-wired connections are required for wireless data communications
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True
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There is widespread support for using RFID technology in numerous ways including passports, driver's licenses, and tracking of ex-convicts.
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False
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Today's cell phone networks use an analog signal.
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False
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Analog systems were designed to support voice communications.
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True
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Fiber-optic cabling sends signals much more slowly than twisted pair or coaxial cablin
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False
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A(n) ____ network includes transmission towers that connect to area handsets
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cellular
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Three types of physical cables that carry a signal are twisted pair, fiber optic, and __
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coaxial
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We rely on ____ as the dominant technology to provide wireless Internet access in our everyday lives.
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wireless fidelity
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Local area networks designed to serve an entire city are called ____ area networks.
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metropolitan
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A(n) ____ signal is designed to represent computer data in a high or low state.
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digital
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A typical setup for a ____ network would include computer users sharing a single Internet connection.
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home
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A ____ is considered a telecommunications device that sends and receives signals.
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all of these cellular tower satellite network adapter
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LTE access promises faster speeds for mobile wireless users and is aimed to be the successor to ____ technologies.
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3G
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The Internet has adopted the ____ set of protocols to define its format of communications between device
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TCP/IP
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A personal area network usually covers a range of around ____ feet.
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33
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4. E-mail, Web pages, chat conversations, Internet TV, and radio content all travel over the Internet in small data packets.
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true
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What is digital divide? you know how to get internet
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False
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Web page who can create? do you have to write in HTML code only? how about MS word?
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everyone/ HTML : No / MS word: Yes
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cloud computing/ which model of cloud computing except? cpph
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There are several cloud models that serve various environments, including private clouds, community clouds, public clouds, and hybrid clouds.
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Synchronous v.s Asynchronous
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Synchronous: live; someone is there; 2 people communitcate (messenger) Asynchronous: only 1 person, temporary, 1 way communication (email)
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how does data travel over the internet?
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it break into packet <- each has header/ travel over internet @ router to router Each packet includes a header with information about where the packet is going, where it originated, and other information necessary to transport the packet to its destination and recreate the original document. Data packets travel over the Internet from router to router until reaching their destinations.Each router examines incoming data packet headers to see where the packet is destined, and uses a routing table to determine the best path for the data packet to take to get closer to its destination.
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Streaming media
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watching movie while downloading; NOT PODCAST the media begins playing while the file is being delivered. Problems arise with this technique only when the speed of play outpaces the speed delivery
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why GOVT not use cloud computing?
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not secure, privacy
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Cookie
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small file (text) for website - to look up personal information@ data base - for crime + science forensics - identify whenever he return
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Types of computers: sever, embedded, personal / which one responds to request from client ?
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server
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Portal
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customize home page
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P2P V.S client server network essay
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P2P: everyone are equal client server network: centralize authority
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physical cables
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study COSC 2
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Apps?
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...
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Wimax it congested or spread out? where would it be used, distance covers
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wifi for entire city Spread out See COSC2
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Describe 3 network :PAN, LAN, WAN or MAN + example
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...
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PAN :
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A personal area network (PAN) is the interconnection of personal information technology devices, typically wirelessly, within the range of an individual. - typically covers a range of around 33 feet or 10 meters. A PAN is typically implemented with Bluetooth.
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WAN
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- connects LANs and MANs between cities, across a country, and around the world, using microwave and satellite transmission or telephone lines. - A LAN becomes a WAN when it extends beyond one geographic location to another geographic location EX PHONE CALL TO VIETNAM - are often used in business systems to connect multiple businesses in a supply chain. that crosses an international border is considered a global or international network
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LAN
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Local area networks can include personal computers, servers, printers, and other network-capable devices.
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Modem turn ___signal to ___ signal
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digtal analog
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Cell phone service?
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...
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Hot spot
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spot with wifi access
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Home network
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is a local area network designed for personal or business use in the home.
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system adminitrator
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who control / manage / maintain network
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protocol
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TCP/IP w/o internet could not run
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cell phone's form factor
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determined how it work, feel, and looks clamshell, slide, swivel, bar, flip
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geotag
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adding geographic identification metadata to digital media and messages. GPS in iphone
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Nodes
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every device on Network: printer, fax.
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compare PAN & home network ; LAN & MAN Essay
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PAN: a network covers within the range of an individual: bluetooth, personal computer ; Home network: local area network for personal or bussiness in the home: sharing a single internet, printer; LAN: network cover limit area : school, libary; MAN: is Local area network design for reserve an entire city
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types of authentication
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what you know: password what you have - token: smart key part of you: finger print
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A Guest account
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is for someone who does not have a permanent account and needs to temporarily access computer or network resources. Guests can't change settings, install hardware or software, or create passwords. An Administrator has full access to system commands and resources.
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fishing = phoiling
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is a technique used to trick a person into providing personal information on a fake Web site that looks like a reputable Web site. Identity thieves might submit a change of address form for a victim in order to have personal information rerouted to their own post office box. Personal information is often stolen by stealing wallets and purses or by stealingdatabase records from businesses.
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white hacker >< black
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white: job/ get pay black: for fun,
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Antivirus software when install it will be good for lifetime T or F
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False b/c it need update bugs
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http://www.mediafire.com/view/co304b95ek80qp1/Ngoi+nha+hanh+phuc-+pianist_vn%40yahoo.com.pdf
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...
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encryption
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secure data tranfer over internet with mathematics function
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who stole information
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hacker
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ways to keep your information?
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...
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firewall
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only block undesireable / not dangerous
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Updates
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fix of sofware
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what internet base crime? ___ crime
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cyber crime
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social engineering
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is a technique that uses social interaction to manipulate individuals into giving up personal information. For example, a criminal may phone a system administrator, pretending to be someone else in order to get access to a network account. Criminals might also buy personal information from other thieves, using underground networks and marketplaces that exist on the Internet.
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Malware explain 3 list: cookie spyware Adware is spyware that displays advertisements.
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- Adware is spyware that displays advertisements. - Spyware differs from viruses and worms in that it does not self-replicate + is software installed on a computer without the user's knowledge, either to monitor the user or to allow an outside party to control the computer - Cookie: a small text for website, look up personal information at database and whenever user might return, that possibly to steal by hacker
