Communications and Networks

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Communications and Networks

  1. 1. COMMUNICATIONS AND NETWORKS INTERNET RESOURCES
  2. 2. UNIT OBJECTIVES• After completing this chapter you will be able to: 1. Discuss the purpose of the components required for successful communications and identify various sending and receiving devices 2. Describe various uses of computer communications 3. List the advantages of using a network, and differentiate among LANs, MANs and WANs 4. Differentiate between client/server and peer-to-peer networks, and describe how P2P networks work
  3. 3. UNIT OBJECTIVES5. Differentiate among a star, bus, and ring network6. Describe the various network communications standards7. Explain the purpose of communications software8. Describe commonly used communications devices9. Discuss different ways to set-up a home network10. Describe various physical and wireless transmission media
  4. 4. COMMUNICATIONSC O M M U N I C A T I O N S A N D N E T WO R K S
  5. 5. COMMUNICATIONS• Computer communications describes a process in which two or more computers or devices transfer data, instructions, and information• Today, even the smallest devices can communicate with each other – often via the Internet
  6. 6. COMMUNICATIONS• For successful communications you need: 1. A sending device that initiates an instruction to transmit data, instructions or information 2. A communication channel or transmission media on which the data, instructions, or information travel 3. A communication device that connects the communications channel to a receiving device that accepts the transmission
  7. 7. USES OF COMMUNICATIONS C O M M U N I C A T I O N S A N D N E T WO R K S
  8. 8. USES OF COMMUNICATIONS• Computer communications are everywhere • Many require that you subscribe to an Internet access provider • With others, organizations such as a business or school provide the communications services
  9. 9. SUMMARY OF COMMUNICATIONS PREVIOUSLY DISCUSSED Communications Previously DiscussedBlogs NewsgroupsChat Rooms RSSE-Mail Video ConferencingFax VoIPFTP Web 2.0Instant Messaging Wikis
  10. 10. WIRELESS MESSAGING SERVICES• Users can send and receive wireless messages to and from smartphones, cell phones, and handheld game consoles using three techniques 1. Text messaging 2. Picture/Video messaging, and 3. Wireless Instant Messaging• The type of messaging depends on the on the services offered by your wireless Internet service provider, or WISP
  11. 11. TEXT MESSAGING• A mobile device with text messaging allows users to send and receive short text messages on a phone or other mobile device• Services allow the user options to send and receive: • Mobile to Mobile • Mobile to E-Mail • Web to Mobile, and • Mobile to Provider
  12. 12. PICTURE/VIDEO MESSAGING• With picture messages users can pictures and sound files, as well as short text messages, to another device• With video messages users can send short, about :30, videos is addition to other type of messages• Smart phones and other devices using MMS, typically have a built-in camera • As a consumer, you should be aware of memory availability and camera quality
  13. 13. WIRELESS INSTANT MESSAGING• Wireless instant messaging (IM) is a real-time communications service that allows mobile devices to exchange messages with other online users• Some WISPs partner with IM services • AT&T allows communications through AIM, Windows Live Messenger, and Yahoo! Messenger

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