COMPUTER SCIENCE ILLUMIN.-TEXT
COMPUTER SCIENCE ILLUMIN.-TEXT
7th Edition
ISBN: 9781284156010
Author: Dale
Publisher: Jones & Barlett
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Chapter 15, Problem 45E
Program Plan Intro

Digital Subscriber Line (DSL):

DSL is a technology that provides high-speed internet access using a broadband modem.

  • The speed and availability of DSL service depend on the distance from the telephone company.
  • It is used to transfer data, audio, video through the copper phone line.
  • It uses higher frequency as much as the line can carry.

Cable modem:

Cable modem is a device that delivers the broadband internet access in the form of cable internet.

  • Cable modem is a bidirectional data communication.
  • It sends the analog signal through the same line used for cable TV connections.
  • It modulates and demodulates signals for transmission and reception through the cable wiring.
  • The speed of cable modem is 1.5 mbps (mega bits per second).

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8. Name and Email AddressesWrite a program that keeps names and email addresses in a dictionary as key-value pairs. The program should display a menu that lets the user look up a person’s email address, add a new name and email address, change an existing email address, and delete an existing name and email address. The program should pickle the dictionary and save it to a file when the user exits the program. Each time the program starts, it should retrieve the dictionary from the file and unpickle it.   How would the user be able to use the program?
Please solve and answer the question correctly please. Thank you!!
Please solve and answer the question correctly please. Thank you!!
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