ABOUT THE AUTHORS Todd Lammle is the authority on Cisco certification and internetworking, and is Cisco certified in most Cisco certification categories. He is a world-renowned author, speaker, trainer, and consultant. Todd has published over 130 books, including the very popular CCNA Cisco Certified Network Associate Study Guide. You can reach Todd through his website at www.lammle.com. Jon Buhagiar, CCNA, is an information technology professional with over two decades of experience in higher education. Currently, he is a director of information technology for RareMed Solutions. Donald Robb has over 15 years of experience with most areas of IT, including networking, security, collaboration, data center, cloud, SDN, and automation/devops. Visit his blog at https://www.the-packet-thrower.com and YouTube channel at https://www.youtube.com/c/ThePacketThrower. Todd Montgomery is a Network Automation Engineer for a Fortune 500 company. He is involved with network design and implementation of emerging datacenter technologies, as well as software defined networking design plans, cloud design, and implementation.

• Acknowledgments xixAbout the Authors xxiIntroduction xxiiiAssessment Test xxxiiiAnswer to Assessment Test xxxviiiChapter 1 Security Concepts 1Chapter 2 Network Security Devices 27Chapter 3 IP, IPv6, and NAT 57Chapter 4 Network Device Access 115Chapter 5 Secure Access Technology 143Chapter 6 OS Basics and Security 179Chapter 7 Endpoint Security 225Chapter 8 Risk Management 265Chapter 9 Vulnerability Management 293Chapter 10 Disaster Recovery 327Chapter 11 Incident Handling 357Chapter 12 Digital Forensics 377Chapter 13 Incident Response 391Appendix A Answers to Review Questions 417Index 439

ABOUT THE AUTHORS Todd Lammle is the authority on Cisco certification and internetworking, and is Cisco certified in most Cisco certification categories. He is a world-renowned author, speaker, trainer, and consultant. Todd has published over 130 books, including the very popular CCNA Cisco Certified Network Associate Study Guide. You can reach Todd through his website at www.lammle.com. Jon Buhagiar, CCNA, is an information technology professional with over two decades of experience in higher education. Currently, he is a director of information technology for RareMed Solutions. Donald Robb has over 15 years of experience with most areas of IT, including networking, security, collaboration, data center, cloud, SDN, and automation/devops. Visit his blog at https://www.the-packet-thrower.com and YouTube channel at https://www.youtube.com/c/ThePacketThrower. Todd Montgomery is a Network Automation Engineer for a Fortune 500 company. He is involved with network design and implementation of emerging datacenter technologies, as well as software defined networking design plans, cloud design, and implementation.

• Acknowledgments xixAbout the Authors xxiIntroduction xxiiiAssessment Test xxxiiiAnswer to Assessment Test xxxviiiChapter 1 Security Concepts 1Chapter 2 Network Security Devices 27Chapter 3 IP, IPv6, and NAT 57Chapter 4 Network Device Access 115Chapter 5 Secure Access Technology 143Chapter 6 OS Basics and Security 179Chapter 7 Endpoint Security 225Chapter 8 Risk Management 265Chapter 9 Vulnerability Management 293Chapter 10 Disaster Recovery 327Chapter 11 Incident Handling 357Chapter 12 Digital Forensics 377Chapter 13 Incident Response 391Appendix A Answers to Review Questions 417Index 439

ABOUT THE AUTHORS Todd Lammle is the authority on Cisco certification and internetworking, and is Cisco certified in most Cisco certification categories. He is a world-renowned author, speaker, trainer, and consultant. Todd has published over 130 books, including the very popular CCNA Cisco Certified Network Associate Study Guide. You can reach Todd through his website at www.lammle.com. Jon Buhagiar, CCNA, is an information technology professional with over two decades of experience in higher education. Currently, he is a director of information technology for RareMed Solutions. Donald Robb has over 15 years of experience with most areas of IT, including networking, security, collaboration, data center, cloud, SDN, and automation/devops. Visit his blog at https://www.the-packet-thrower.com and YouTube channel at https://www.youtube.com/c/ThePacketThrower. Todd Montgomery is a Network Automation Engineer for a Fortune 500 company. He is involved with network design and implementation of emerging datacenter technologies, as well as software defined networking design plans, cloud design, and implementation.

• Acknowledgments xixAbout the Authors xxiIntroduction xxiiiAssessment Test xxxiiiAnswer to Assessment Test xxxviiiChapter 1 Security Concepts 1Chapter 2 Network Security Devices 27Chapter 3 IP, IPv6, and NAT 57Chapter 4 Network Device Access 115Chapter 5 Secure Access Technology 143Chapter 6 OS Basics and Security 179Chapter 7 Endpoint Security 225Chapter 8 Risk Management 265Chapter 9 Vulnerability Management 293Chapter 10 Disaster Recovery 327Chapter 11 Incident Handling 357Chapter 12 Digital Forensics 377Chapter 13 Incident Response 391Appendix A Answers to Review Questions 417Index 439