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Jannie Martin__IT331-02_Unit 2_Project

# Jannie Martin__IT331-02_Unit 2_Project - I T331-02...

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Unformatted text preview: I T331-02 Technology I nfrastr ucture: Unit 2 Assignment 06/19/2010 Jannie Mar tin K aplan University I nstr uct or: Professor Howard Weinraub Networ k M edia Networ k M edia IT331-02 – Unit 2 Assignment: W hat data codes are, and how data is converted into signals . 1 Data communication – • Transfer of digital or analog data using digital or analog signals (White, 2009). Computer network – • Interconnection of computers and computing equipment using either wires or radio waves over small or large geographic areas (White, 2009). A list of the things I do in an average day that uses data communications and computer networks: • ride the bus • driving on highway • 24-hour banking withdrawal • work on homework on computer • check e-mail • go grocery shopping • make a phone call • send a text message • use aim messenger Data Codes – Data codes are necessary to transmit the letters, numbers, symbols, and control characters found in text data. When you go to the bank to transfer money textual information is transmitted. The account number, bank name, address, account owner name and the amount of money are transmitted as a sequence of characters. Each character has a unique binary pattern of 1’s and 0’s to distinguish one character from IT331-02 – Unit 2 Assignment: W hat data codes are, and how data is converted into signals . 2 another. The set of all textual characters or symbols and their corresponding binary patterns is called a data code. Three important data codes are EBCDIC, ASCII, and Unicode (White, 2009). EBCDIC The Extended Binary Coded Decimal Interchange Code (EBCDIC) is an eight- bit code allowing 256 ( = 28 256) possible combinations of textual symbols. They are all uppercase and lowercase letters, the numbers 0 - 9, many special symbols and punctuation marks, and control characters (White, 2009). If I wanted a computer to send the message, “I am 2 Cool!” using EBCDIC the following characters would be sent: I – 1100 1001 Space – 0100 0000 a – 1000 0001 m – 1001 0100 Space – 0100 0000 2 – 1111 0010 Space – 0100 0000 C – 1100 0011 o – 1001 0110 o – 1001 0110 l – 1001 0011 Exclamation point – 0101 1010 IT331-02 – Unit 2 Assignment: W hat data codes are, and how data is converted into signals . 3 ASCII The American Standard Code for Information Interchange (ASCII) is a government standard in the United States and is the most broadly used data codes in the world. It includes a seven-bit version that allows for 128 ( = 27 128) possible combinations of textual symbols. They represent uppercase and lowercase letters, the numbers 0 to 9, special symbols, and control characters (White, 2009). If I wanted a numbers 0 to 9, special symbols, and control characters (White, 2009)....
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Jannie Martin__IT331-02_Unit 2_Project - I T331-02...

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