INTERNET & COMMUNICATION UNIT 2: UNIT 2: Communication by Using Information Technology, Information Sharing and Self Expression 1 by Mutlu BAYKAL

WHAT IS THE INTERNET ? A worldwide network of linked computers, sharing information and connecting people 2

WHAT CAN WE DO ON THE INTERNET?   Instant Messaging  Surf the World Wide Web  Sharing information  Receiving information  Much, much more! 3

NEEDS FOR INTERNET CONNECTION Hardware 1-Network Card 2-Modem 3-Cables 4-Telephone line

NEEDS FOR INTERNET CONNECTION Hardware 1-Network Card 1 Network card is an electronic device that connects a computer to a computer network, usually a LAN. There are two types of network cards Wired and Wireless 5

NEEDS FOR INTERNET CONNECTION Hardware 2-Modem 2 A modem (modulator-demodulator) is a device that modulates an analogy carrier signal to encode digital information and demodulates the signal to decode the transmitted information. 6

NEEDS FOR INTERNET CONNECTION Hardware 3-Cables 3 To provide a connection between modem and the computer, we need cables. The most commonly used cable type CAT5 cables. 7

NEEDS FOR INTERNET CONNECTION Hardware 4-Telephone line 4 The speed of your Internet connection, upload, download capacity depend on your phone line is speed Phone lines are provided by TTNET in Turkey. 8

NEEDS FOR INTERNET CONNECTION Software In order to use a computer, we need an Operating System. Operating Systems are the software. Most used OS are Windows Operating Systems, UNIX, Android, Apple. 9

COMPUTER NETWORKS  A network consists of two or more computers that are linked in order to share resources (such as printers and CDs), exchange files, or allow electronic communications.  Computers in a network can communicate with each other and share data. 10

W HY D O W E N EED TO C OMPUTER N ETWORKS 11 Data sharing To share peripherals (printer, scanner etc.) Applications use common

COMPUTER NETWORKS  (Local Area Network, LAN) : It is a kind of computer network connects computers and other devices to each other in a limited geographical area as homes, schools, laboratories, offices and so on. 12

COMPUTER NETWORKS  (Wide Area Network, WAN) : That allows multiple devices to communicate with each other is a huge network of physical or logical. Providing interconnection of local area networks are very large networks 13

R EFERENCES Bilişim Teknolojileri ve Yazılım Ders Kitabı Mustafa SANGÜL 14