Chapter 6 Communications and Network Technologies: Connecting Through Computers Chapter Outline Key Terms Study Questions 6.1 How Does the Use computer network What's the definition of a computer Networking? intranet network? extranet How are computer networks used? What's the difference between an intranet and an extranet? 6.2 Exploring communications system What are the components of a computer network protocol network as a communications system? Communications Systems How do we use networked communication systems in our everyday lives? What are network protocols? Types of Signals analog signal How do analog signals differ from digital digital signal signals? Why do analog signals need to be converted? What does a modem do? Transmission Speed frequency What factors affect transmission speed? bandwidth What is frequency and how does it affect broadband transmission speed? kilobit per second (Kbps) To what does bandwidth refer? megabit per second What is broadband? (Mbps) What are the various bandwidth gigabit per second (Gbps) measurements? terabit per second (Tbps) What are the typical speeds for the petabit per second (Pbps) various types of Internet connections? Take the Next Step: Activity What happens when you send a message 6.2.1 over a network? 6.3 Transmission Systems What are the two ways signals can be transmitted? Transmissions twisted-pair cable What media are used to carry wired coaxial cable signals? fiber-optic cable How do the various types of cable differ? Wireless Transmissions cellular network What types of wireless transmission cellular transmissions systems are in use today? microwave What are the differences among the four satellite communication generations of cellular transmission? What are the drawbacks of microwave transmission? How is satellite communication used? Take the Next Step: Activity How does infrared technology work? 6.3.1 6.4 Communications standards How do standards help devices talk to one Standards and Protocols American National another? Standards Institute What organizations develop standards? (ANSI) What is a protocol? Institute of Electrical and Electronics Engineers (IEEE) protocol
Chapter 6 Communications and Network Technologies: Connecting Through Computers Chapter Outline Key Terms Study Questions 6.1 How Does the Use Networking? computer network intranet extranet What's the definition of a computer network? How are computer networks used? What's the difference between an intranet and an extranet? 6.2 Exploring Communications Systems communications system network protocol What are the components of a computer network as a communications system? How do we use networked communication systems in our everyday lives? What are network protocols? Types of Signals analog signal digital signal How do analog signals differ from digital signals? Why do analog signals need to be converted? What does a modem do? Transmission Speed frequency bandwidth broadband kilobit per second (Kbps) megabit per second (Mbps) gigabit per second (Gbps) terabit per second (Tbps) petabit per second (Pbps) What factors affect transmission speed? What is frequency and how does it affect transmission speed? To what does bandwidth refer? What is broadband? What are the various bandwidth measurements? What are the typical speeds for the various types of Internet connections? Take the Next Step: Activity 6.2.1 What happens when you send a message over a network? 6.3 Transmission Systems What are the two ways signals can be transmitted? Transmissions twisted-pair cable coaxial cable fiber-optic cable What media are used to carry wired signals? How do the various types of cable differ? Wireless Transmissions cellular network cellular transmissions microwave satellite communication What types of wireless transmission systems are in use today? What are the differences among the four generations of cellular transmission? What are the drawbacks of microwave transmission? How is satellite communication used? Take the Next Step: Activity 6.3.1 How does infrared technology work? 6.4 Communications Standards and Protocols standards American National Standards Institute (ANSI) Institute of Electrical and Electronics Engineers (IEEE) protocol How do standards help devices talk to one another? What organizations develop standards? What is a protocol?