Communications Fundamentals FAQ

Chapter 13 FAQ

1. 13.8.1 What Is the Difference Between Simplex, Half-Duplex, and Full-Duplex Communication
   1. Why Are There Different Types of Communication?
   2. What Is Simplex Communication?
   3. What Is Half-Duplex Communication?
   4. What Is Full-Duplex Communication?
   5. Why Doesn't Every System Use Full-Duplex?
   6. Why Is Half-Duplex So Common in Radio Systems?
   7. What Is the Difference Between Simplex and Broadcast?
   8. Does Full-Duplex Eliminate the Need for Communication Protocols?
   9. Which Transmission Mode Is Most Efficient?
   10. How Are These Transmission Modes Used Today?
   11. What Should You Remember?
2. 13.8.2 Why Do Some Communication Systems Need Two-Way Communication While Others Do Not
   1. Why Isn't Every Communication System Two-Way?
   2. Which Applications Only Need One-Way Communication?
   3. Why Is Broadcasting a Good Example?
   4. Why Do Navigation Satellites Use One-Way Communication?
   5. When Is Two-Way Communication Essential?
   6. Why Do Computer Networks Need Replies?
   7. Why Do Some Radio Systems Use Half-Duplex Instead of Full-Duplex?
   8. Why Do Telephones Need Full-Duplex?
   9. Can a Communication System Use More Than One Transmission Mode?
   10. How Does Cost Influence the Choice?
   11. Will Future Communication Systems Always Be Interactive?
   12. Why Is Choosing the Right Transmission Mode Important?
   13. What Should You Remember?
3. 13.8.3 How Does Packet Switching Make the Internet Possible
   1. What Is Packet Switching?
   2. Why Divide a Message into Packets?
   3. How Do Many Users Share the Same Network?
   4. How Does a Packet Reach Its Destination?
   5. Do All Packets Follow the Same Route?
   6. What Happens If Packets Arrive Out of Order?
   7. Why Is Packet Switching Better Than Circuit Switching for Data?
   8. Does Packet Switching Have Any Disadvantages?
   9. How Does Packet Switching Support Different Applications?
   10. Is the Internet One Giant Packet-Switched Network?
   11. How Has Packet Switching Changed Communications?
   12. Will Packet Switching Continue to Dominate?
   13. What Should You Remember?
4. 13.8.4 What Is the Difference Between Circuit Switching and Packet Switching
   1. Why Were Two Different Switching Techniques Developed?
   2. How Does Circuit Switching Work?
   3. How Does Packet Switching Work?
   4. Why Is Circuit Switching Well Suited to Voice?
   5. Why Is Packet Switching Better for Computer Data?
   6. How Do the Two Techniques Allocate Resources?
   7. Which Technique Is More Efficient?
   8. Which Technique Produces Lower Delay?
   9. Can Packet Switching Carry Voice Calls?
   10. Is Circuit Switching Still Used?
   11. Why Did Packet Switching Become Dominant?
   12. Is the Difference Becoming Less Clear?
   13. What Should You Remember?
5. 13.8.5 Why Did Technologies Such AS X.25, Frame Relay, and ATM Disappear
   1. Why Were These Technologies Developed?
   2. Why Was X.25 Introduced?
   3. Why Was X.25 So Successful?
   4. Why Did Frame Relay Replace X.25?
   5. What Advantages Did Frame Relay Offer?
   6. Why Was ATM Developed?
   7. What Made ATM Different?
   8. Why Didn't ATM Become the Universal Network?
   9. How Did the Internet Change Everything?
   10. Did These Technologies Really Disappear?
   11. What Replaced Them?
   12. What Lessons Can We Learn?
   13. Why Is It Still Worth Learning About These Technologies?
   14. What Should You Remember?
6. 13.8.6 How Does Broadband Reach My Home
   1. What Is the "Last Mile"?
   2. What Happens After I Connect?
   3. Why Are There Different Broadband Technologies?
   4. How Does Fiber-to-the-Home (FTTH) Work?
   5. How Does DSL Use Existing Telephone Lines?
   6. How Does Cable Broadband Work?
   7. How Does Fixed Wireless Broadband Work?
   8. Can Mobile Networks Replace Home Broadband?
   9. How Does Satellite Broadband Work?
   10. Why Are Download Speeds Usually Faster Than Upload Speeds?
   11. Which Broadband Technology Is Best?
   12. How Will Home Broadband Continue to Evolve?
   13. What Should You Remember?
7. 13.8.7 Why Is Fiber Optic Broadband Better Than DSL OR Cable
   1. Why Are There Several Broadband Technologies?
   2. How Does Fiber Optic Broadband Work?
   3. How Does DSL Work?
   4. How Does Cable Broadband Work?
   5. Why Is Fiber Faster?
   6. Why Does DSL Become Slower with Distance?
   7. Why Can Cable Speeds Vary During the Day?
   8. Which Technology Is More Reliable?
   9. Which Technology Offers the Highest Upload Speeds?
   10. Is Fiber More Expensive?
   11. Will DSL and Cable Disappear?
   12. Which Broadband Technology Should Be Chosen?
   13. What Should You Remember?
8. 13.8.8 Why Are Broadband Speeds Different for Different Users
   1. Why Doesn't Everyone Receive the Advertised Speed?
   2. How Does the Access Technology Affect Speed?
   3. Why Does Distance Matter?
   4. Why Can Cable Broadband Slow Down in the Evening?
   5. Does Home Wi-Fi Affect Broadband Speed?
   6. Can Customer Equipment Become the Bottleneck?
   7. Why Does Network Congestion Reduce Speed?
   8. Does Signal Quality Affect Speed?
   9. Why Do Upload and Download Speeds Differ?
   10. Does the Remote Website Affect Performance?
   11. Why Can Speed Change from Minute to Minute?
   12. Will Broadband Speeds Continue to Increase?
   13. What Should You Remember?
9. 13.8.9 How Can Satellites Provide Internet Access Almost Anywhere
   1. Why Is Satellite Broadband Needed?
   2. How Does Satellite Internet Work?
   3. Why Can Satellites Cover Such Large Areas?
   4. What Is the Difference Between GEO, MEO, and LEO Satellites?
   5. Why Was Satellite Internet Once Considered Slow?
   6. How Have LEO Constellations Changed Satellite Broadband?
   7. What Are the Advantages of Satellite Broadband?
   8. What Are the Limitations?
   9. Can Satellite Broadband Match Fiber?
   10. How Is Satellite Broadband Used Today?
   11. How Will Satellite Broadband Continue to Evolve?
   12. Why Is Satellite Broadband Important?
   13. What Should You Remember?
10. 13.8.10 How Will Communication Networks Continue to Evolve
    1. How Have Communication Networks Changed?
    2. Why Are Networks Still Changing?
    3. Will Fiber Continue to Expand?
    4. What Is Software-Defined Networking?
    5. What Is Network Function Virtualization?
    6. Will Artificial Intelligence Manage Networks?
    7. How Will Mobile Networks Evolve?
    8. Will Satellites Become Part of Everyday Networks?
    9. What Does "Cloud-Native Networking" Mean?
    10. Will Communication Become More Secure?
    11. Will Switching Techniques Continue to Change?
    12. What Skills Will Future Communication Engineers Need?
    13. Why Is It Important to Understand Communication Systems?
    14. What Should You Remember?