CCST Cisco Certified Support Technician Study Guide

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, and over a hundred more from Sybex. He runs an international consulting and training company based in northern Idaho, where he spends his free time in the mountains playing with his golden retrievers. You can reach Todd through his website at www.lammle.com. Donald Robb has over 15 years of experience with most areas of IT, including networking, security, collaboration, data center, cloud, SDN, and automation/devops. He’s earned many advanced certifications and specializations. Currently he’s a SDN/Cloud/DevOps SME. Visit his blog at https://www.the-packet-thrower.com and YouTube channel at https://www.youtube.com/c/ThePacketThrower.

• Introduction xxiAssessment Test xxxiChapter 1 Internetworking 1Internetworking Basics 2Internetworking Models 10The Layered Approach 10Advantages of Reference Models 11The OSI Reference Model 12The Application Layer 14The Presentation Layer 15The Session Layer 15The Transport Layer 15The Network Layer 21The Data Link Layer 23The Physical Layer 26Summary 29Exam Essentials 29Review Questions 31Chapter 2 Introduction to TCP/IP 33Introducing TCP/IP 34A Brief History of TCP/IP 34TCP/IP and the DoD Model 35The Process/Application Layer Protocols 37The Host- to- Host or Transport Layer Protocols 46The Internet Layer Protocols 55IP Addressing 64IP Terminology 64The Hierarchical IP Addressing Scheme 65Private IP Addresses (RFC 1918) 70IPv4 Address Types 71Layer 2 Broadcasts 71Layer 3 Broadcasts 72Unicast Address 72Multicast Address 73Summary 74Exam Essentials 75Review Questions 77Chapter 3 Easy Subnetting 81Subnetting Basics 82How to Create Subnets 83Subnet Masks 84Classless Inter-Domain Routing (CIDR) 86IP Subnet-Zero 87Subnetting Class C Addresses 88Using a Subnet Calculator 99Subnetting Class B Addresses 99Subnetting Class A Addresses 107Summary 110Exam Essentials 111Review Questions 112Chapter 4 Network Address Translation (NAT) & IPv6 115When Do We Use NAT? 116Types of Network Address Translation 118NAT Names 118How NAT Works 119Why Do We Need IPv6? 120The Benefits and Uses of IPv 6 122IPv6 Addressing and Expressions 123Shortened Expression 123Address Types 124Special Addresses 126How IPv6 Works in an Internetwork 127Manual Address Assignment 127Stateless Autoconfiguration (EUI- 64) 128Neighbor Discovery (NDP) 129Summary 130Exam Essentials 131Review Questions 133Chapter 5 IP Routing 137Routing Basics 138The IP Routing Process 141Testing Your IP Routing Understanding 146Configuring IP Routing 151Static Routing 151Default Routing 153Dynamic Routing 154Routing Protocol Basics 154Summary 156Exam Essentials 156Review Questions 158Chapter 6 Switching 161Switching Services 162Three Switch Functions at Layer 2 163VLAN Basics 169Broadcast Control 172Security 173Flexibility and Scalability 173Identifying VLANs 174Assigning Switch Ports to VLANs 176Routing Between VLANs 178Summary 180Exam Essentials 180Review Questions 182Chapter 7 Cables and Connectors 185The Basic Network Topologies 186Local Area Networks 187Wide Area Networks 189Metropolitan Area Networks 190Campus Area Networks 190Personal Area Networks 190Storage Area Networks 190Physical Network Topologies 191Bus Topology 191Star Topology 192Ring Topology 193Mesh Topology 194Point- to- Point Topology 195Point- to- Multipoint Topology 196Hybrid Topology 197Physical Media 197Coaxial Cable 198Fiber- Optic Cable 204Summary 208Exam Essentials 208Review Questions 209Chapter 8 Wireless Technologies 213Wireless Networks 215Wireless Personal Area Networks 215Wireless Local Area Networks 216Wireless Metro Area Networks 216Wireless Wide Area Networks 217Basic Wireless Devices 217Wireless Access Points 217Wireless Network Interface Card 219Wireless Antennas 220Wireless Principles 220Independent Basic Service Set (Ad Hoc) 220Basic Service Set 222Infrastructure Basic Service Set 222Service Set ID 222Extended Service Set 224Nonoverlapping Wi- Fi channels 2252.4 GHz Band 2255 GHz Band (802.11ac) 226Wi- Fi 6 (802.11ax) 228Interference 229Range and Speed Comparisons 229Cellular Technologies 229Technologies That Facilitate the Internet of Things 231Wireless Security 232Authentication and Encryption 232Wep 233WPA and WPA2: An Overview 234Wpa 3 236Network Host Utilities 238Windows 239MacOS 247Linux 251Apple 256Android 260Summary 264Exam Essentials 265Review Questions 266Chapter 9 Cisco Devices 271Status Lights 272Connecting to a Cisco Device 273Physical Ports and Cables 275Console Port 275Serial Port 277Fiber Port 278SFPs 279Ethernet Ports 279Straight- Through Cable 281Crossover Cable 282PoE 283Remote Access 284Terminal Emulators 284Remote Desktop Gateway/Remote Desktop Protocol 284Telnet 285Secure Shell 287Virtual Private Networks 289Network Management Systems 290Cloud- Managed Network (Meraki) 291Scripts 292Cisco Device show Commands 295show running- config (show run) 295show cdp neighbors 296Documenting a Network Topology Using CDP 299Show ip route 301Show version 302Show inventory 303Show switch 304Show mac- address- table 305Show interface 307Show ip interface brief 309Privilege Level 310The Help Command 311Auto- Complete 313Summary 314Exam Essentials 314Review Questions 315Chapter 10 Security 319Firewalls 320Controlling Network Access 321Access Control Lists 322Confidentiality, Integrity, Availability 324Confidentiality 324Integrity 324Availability 324Authentication Methods 324Multifactor 324Authentication, Authorization, and Accounting 325Encryption 327Certificates 329Hashes 330Active Directory (Identity) 330Identity Service Engine Authentication 332Password Complexity 332Threats 334Vulnerabilities 335Common Vulnerabilities and Exposures 335Zero- Day 335Exploits 336Social Engineering 336Phishing 336Malware 336Denial of Service/Distributed Denial of Service 338Summary 340Exam Essentials 340Review Questions 341Chapter 11 Cloud & IoT 343Cloud Computing and Its Effect on the Enterprise Network 344Cloud Concepts 346Service Models 347Cloud Endpoints 350VoIP- IoT Applications 351Summary 352Exam Essentials 353Review Questions 354Chapter 12 Troubleshooting 357Help Desk 358The Security Policy 359Ticketing 361Information Gathering Using Network Documentation 362Using SNMP 362Schematics and Diagrams 363Documentation and Diagrams 367Physical Network Diagram 367Logical Network Diagram 368Seven- Step Troubleshooting Process 368Define the Problem 369Gather Information 369Analyze the Information 369Eliminate Possible Causes 370Propose a Hypothesis 370Test the Hypothesis 370Solve the Problem 370Wireshark 371Filtering and Saving 372Diagnostic Commands 373Firewalls 374IP Config 375Using Diagnostic Commands to Solve Network Issues 383Network Bandwidth and Throughput 388Speed Tests vs. iPerf 388Summary 391Exam Essentials 391Review Questions 393Appendix Answers to Review Questions 395Chapter 1: Internetworking 396Chapter 2: Introduction to TCP/IP 397Chapter 3: Easy Subnetting 398Chapter 4: Network Address Translation (NAT) and IPv 6 399Chapter 5: IP Routing 400Chapter 6: Switching 401Chapter 7: Cables and Connectors 402Chapter 8: Wireless Technologies 403Chapter 9: Cisco Devices 404Chapter 10: Security 405Chapter 11: Cloud & IoT 406Chapter 12: Troubleshooting 407Index 409