CS180 Study Guide for Test No. 4 (Computer Concepts Units E to H) Unit E: Networks and the Internet • Classifications of networks based on geographic structure: PAN, LAN, NAN, MAN and WAN • Classifications of networks based on configuration: client/server network, peer-to-peer (P2P) network. • Ethernet: ways for transporting data between computers in LAN • Network devices: network interface card (NIC), router, modem, wireless routers • Bandwidth: network capacity, bits per second (narrowband vs. broadband) • Wireless media: radio frequency (RF), microwaves, infrared light • Wired vs. wireless network: advantages and disadvantages • Installing a LAN: NIC, router, modem… • Internet: ISP, NSP, Internet backbone • IP address, for example, 204.127.129.001 • Domain name, for example, barry.edu • Connecting to the Internet with wires: dial-up, DSL, cable networks • Connecting to the Internet without wires: satellite, WiMAX, public Wi-Fi, Wi-Fi hotspot, Mobile WiMAX, WAP, mobile broadband. Unit F: Data Security • Identifying potential problems when using computers, for example, power outages and hardware failure. • Protect computers from power problems (UPS) • Authentication: biometrics, two-factor authentication, user ID and password • Password security: identify theft, brute force attack, password manager, user access right • Malware: virus, worms, Trojan hours (keylogger, RAT), bot (zombie, botmaster) and spyware. • People behind malware: hackers, crackers, black hats or cybercriminals • Security suite: antivirus, firewall, scan, virus signature and virus definition • Wireless encryption: WEP, WPA, WPA2 • Web security: cookies (ad-serving cookies, flash cookies), Web bug (clear GIF), a fake site (phishing attack) • E-mail security: spam, e-mail authentication, spam filter • Backup procedures Unit G: The Web and E-Commerce • Definition of the Web, Web sites, Web pages, hyperlinks (links), HTTP, HTML, URL and HTTP status codes • Types of Web sites: blog, wiki, Web2.0, podcast, RSS … • Web page authoring: HTML markup language, link, Web authoring software• Web browsers: bookmark, helper application, Web cache • Search engines: Web crawler, indexer, query processor, link popularity, keyword search, keyword stuffing, Boolean operators for keyword search, advanced search • E-commerce: examples (B2B, B2C…), online shopping cart (cookies), advertising (banner ad, pop-up ad) • Online shopping security: HTTPS • Fraud on the Web: phishing attack, pharming attack, fake sites Unit H: Digital Media • Digital audio: file format (Wave, MP3, AIFF…) • Synthesizing sound: sound card, speech synthesis, phonemes, speech recognition • Bitmap graphics: pixel, the creation and transfer of bitmap graphics, resolution, density, cropping, file size, pixel interpolation • Color: depth, color palette • Vector graphics: instructions for creating an image, drawing software • 3D graphics • Digital video: web-based video, streaming video, external/internal video, format (AVI, MPEG, Flash…), video clip • Digital video editing: codec, frame rate, bit