MIS Exam 2 Study Guide

MIS Exam 2 Study Guide - MIS Exam 2 Study Guide Chapter 6...

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MIS Exam 2 Study Guide Chapter 6: Data Communications Terms : Access Control List (ACL) – encodes the rule stating which IP addresses (websites) are allowed and which are prohibited Access Point (AP) – sends and receives wireless traffic using 802.11 protocol and communicates with switch using 802.3 protocol; connects wireless devices to wired allowing wireless devices to communicate with wired through the switch Analog signal – wavy signal; digital data must be converted to analog to connect to the ISP via telephone line, DSL line or cable TV line; sent via copper wire - analog signal is converted to digital signal (and vice versa) by the modem (modulator/demodulator) - circuit switching; point-to-point connection; quality connection; pay for connection whether used or not Digital signal – sent via fiber optic cable; combination of 0’s and 1’s; easy to reconstruct if it degrades - packet switching; CAS of Internet; multiplexing saves $; started with computers; now RTF and music digitized - multiplexing: packets from many transmissions are mixed on each transmission line – many packets on same line Domain Name Resolution – the process of converting a domain name into a public IP address - the Domain Name System (DNS) accepts requests from programs to convert domain names into IP Dynamic Host Configuration Protocol (DHCP) – distributes temporary IP addresses to computers or devices that connect to a LAN Encryption – transforms clear text into coded text for secure storage and communication using algorithms Firewall – a special-purpose computer or program on a computer that prevents unauthorized network access HTTPS – secure hypertext transport protocol – provides secure communication over the Internet - is encrypted using SSL/TLS protocol – Secure Socket Layer, Transport Layer Security - encodes using public key/private key and symmetric encryption: o Your computer obtains the Web site’s public key. Your computer generates a key and encodes is using the Web site’s public key. You send the newly generated encrypted symmetric key to the Web site. The Web site decodes the symmetric key using its private key Internet Service Provider (ISP) - - provides users with Internet address (IP addresses) and Internet access - connects you to Internet - passes information back and forth between user and the Internet - pay for the Internet; collect access fees and other charges on the users’ behalf IP Address – logical temporary addresses written as a series of decimals - Public: used on Internet, assigned by ICAAN, each is unique - Private: used within private networks, controlled by the company operating the network; manually assigned by network administrator; usually given to web servers and shared devices Local Area Network (LAN) – connects computers in a SINGLE location (within half a mile of each other)
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MIS Exam 2 Study Guide - MIS Exam 2 Study Guide Chapter 6...

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