Ebook: CompTIA Network+ Study Guide

The CompTIA Network+ Study Guide, 3rd edition, is your one-stop resource for complete coverage of Exam N10-006. This Sybex study guide covers 100% of all exam N10-006 objectives. Content includes assessment tests that check exam readiness, objective map, real-world scenarios, hands-on exercises, key topic exam essentials, and challenging chapter review questions.;Introduction -- Assessment test -- Ch. 1. Introduction to Networks. First Things First: What's a Network?: The local area network ; Common network components ; Wide area network ; Network architecture : peer-to-peer or client-server? -- Physical Network Topologies: Bus topology ; Star topology ; Ring topology ; Mesh topology ; Point-to-point topology ; Point-to-multipoint topology ; Hybrid topology -- Topology Selection, Backbones, and Segments: Selecting the right topology ; The network backbone ; Network segments -- Summary -- Exam Essentials -- Written Labs -- Review questions -- Ch. 2. The Open Systems Interconnection Specifications. Internetworking Models: The layered approach ; Advantages of reference models -- The OSI Reference Model: The application layer ; The presentation layer ; The session layer ; The transport layer ; The network layer ; The data link layer ; The physical layer -- Introduction to encapsulation -- Modulation techniques -- Summary -- Exam essentials -- Written lab -- Review Questions -- Ch. 3. Networking Topologies, Connectors, And Wiring Standards. Physical Media: Coaxial cable ; Twisted-pair cable ; Fiber-optic cable ; Media converters ; Serial cables -- Cable Properties: Transmission speeds ; Distance ; Duplex ; Noise immunity (Security, EMI) ; Frequency -- Wiring Standards: 568A versus 568B ; Straight-through cable ; Crossover cable ; Rolled/rollover cable ; T1 crossover cable -- Installing Wiring Distributions -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 4. The Current Ethernet Specifications. Network Basics -- Ethernet Basics: Collision domain ; Broadcast domain ; CSMA/CD ; Broadband/baseband ; Bit rates versus baud rate ; Wavelength ; Sampling-size ; Half-and full-duplex Ethernet -- Ethernet at the Data Link Layer: Binary to decimal and hexadecimal conversion ; Ethernet addressing ; Ethernet frames -- Ethernet at the Physical Layer -- Ethernet Over Other Standards (IEEE 1905.1-2013): Ethernet over power line ; Ethernet over HDMI -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 5. Networking Devices. Common Network Connectivity Devices: Network interface card ; Hub ; Bridge ; Switch ; Router ; Firewall ; IDS/IPS ; HIDS ; Access point ; Dynamic host configuration protocol server -- Other Specialized Devices: Multilayer switch ; Load balancer ; Domain name service server ; Proxy server ; Encryption devices ; Analog modem ; Packet shaper ; VPN concentrator -- Planning and Implementing a Basic SOHO Network Using Network Segmentation: Determining requirements ; Switches and bridges at the data link layer ; Hubs at the physical layer ; Environmental considerations -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 6. Introduction to the Internet Protocol. Introducing TCP/IP: A brief history of TCP/IP ; TCP/IP and the DoD model ; The process/application layer protocols ; The host-to-host layer protocols ; The Internet layer protocols -- Data Encapsulation -- Summary -- Exam essentials -- Written lab -- Review Questions -- Ch. 7. IP Addressing. IP Terminology -- Hierarchical IP Addressing Scheme: Network addressing ; Private IP addresses (RFC 1918) -- IPv4 Address Types: Layer 2 broadcasts ; Layer 3 broadcasts ; Unicast address ; Multicast address (Class D) -- Internet Protocol Version 6 (IPv6): Why do we need IPv6? ; The benefits of and uses for IPv6 ; IPv6 addressing and expressions ; Shortened expression ; Address types ; Special addresses ; Stateless auto-configuration (EUI-64) ; DHCPv6 (Stateful) ; Migrating to IPv6 -- Summary -- Exam essentials -- Written Lab: Written Lab 7.1 ; Written Lab 7.2 ; Written Lab 7.3 -- Review questions -- Ch. 8. IP Subnetting, Troubleshooting IP, and Introduction to NAT. Subnetting Basics: How to create subnets ; Subnet masks ; Classless Inter-Domain Routing (CIDR) ; Subnetting Class C addresses ; Subnetting Class B addresses -- Troubleshooting IP Addressing: Determining IP address problems -- Introduction To Network Address Translation (NAT): Types of network address translation ; NAT names ; How NAT works -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 9. Introduction to IP Routing. Routing basics ; The IP routing process ; Testing your IP routing understanding ; Static and dynamic routing ; Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 10. Routing Protocols. Routing Protocol Basics: Administrative distances ; Classes of routing protocols -- Distance Vector Routing Protocols: Routing Information Protocol (RIP) ; RIP version 2 (RIPv2) ; VLSM and discontinuous networks ; EIGRP ; Border Gateway Protocol (BGP) -- Link State Routing Protocols: Open Shortest Path First (OSPF) ; Intermediate System-To-Intermediate System (IS-IS) -- High Availability: Hot Standby Router Protocol (HSRP) ; Virtual router redundancy protocol -- IPv6 Routing Protocols: RIPng ; EIGRPv6 ; OSPFv3 -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 11. Switching and Virtual LANs. Networking before layer 2 switching -- Switching Services: Limitations of layer 2 switching ; Bridging versus LAN switching ; Three switch functions at layer 2 -- Spanning Tree Protocol: Spanning tree port states ; STP convergence ; Rapid spanning tree protocol 802.1w -- Virtual LANs: VLAN basics ; Quality of service ; VLAN memberships ; Static VLANs ; Dynamic VLANs ; Identifying VLANs ; VLAN identification methods -- VLAN Trunking Protocol: VTP modes of operation ; Do we really need to put an IP address on a switch? ; Port security ; Port bonding -- Two Additional Advanced Features of Switches: Power over Ethernet (802.3af, 802.3at) ; Port Mirroring/Spanning (SPAN/RSPAN) -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 12. Wireless Networking. Introduction to wireless technology -- The 802.11 Standards: 2.4GHz (802.11b) ; 2.4GHz (802.11g) ; 5GHz (802.11a) ; 5GHz (802.11h) ; 2.4GHz/5GHz (802.11n) ; 5GHz (802.11ac) -- Comparing 802.11 Standards: Range comparisons -- Wireless Network Components: Wireless access points ; Wireless network interface card ; Wireless antennas -- Installing a Wireless Network: Ad hoc mode : independent basic service set ; Infrastructure mode : basic service set ; Wireless controllers ; Mobile hot spots ; Signal degradation ; Other network infrastructure implementations ; Installing and configuring WLAN hardware -- Site survey -- Wireless Security: Wireless threats ; Open access ; Service set identifiers, wired equivalent privacy, and media access control address authentication ; Remote authentication dial-in user service (802.1x) ; Temporal key integrity protocol ; Wi-Fi protected access or WPA2 pare-shared key -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 13. Authentication and Access Control. Security Filtering: Access control lists ; Tunneling ; Encryption ; Remote access -- Managing User Account and Password Security: Managing user accounts ; Managing passwords ; Single sign-on ; Multifactor authentication -- User-authentication methods: Public Key Infrastructure (PKI) ; Kerberos ; Authentication, Authorization, and Accounting (AAA) ; Web services ; Unified voice services ; Network controllers ; Network Access Control (NAC) ; Challenge Handshake Authentication Protocol (CHAP) ; MS-CHAP ; Extensible Authentication Protocol (EAP) ; Hashes ; Network access control -- Summary -- Exam essentials -- Written lab -- Review questions --;Ch. 14. Network Threats And Mitigation. Recognizing Security Threats: Denial of service ; Distributed DoS (DDos) ; Authentication issues ; Viruses ; Zero day attacks ; Insider threat/malicious employee -- Vulnerabilities: Unnecessary running services ; Open ports ; Unpatched/legacy systems ; Unencrypted channels ; Clear-text credentials ; TEMPEST/RF emanation ; Malicious users ; Buffer overflow ; Wireless threats ; Attackers and their tools ; Misconfiguration issues ; Social Engineering (Phishing) -- Understanding Mitigation Techniques: Active detection ; Passive detection ; Proactive defense ; Basic forensic concepts -- Policies And Procedures: Security policies ; Security training ; Patches and upgrades ; Firmware updates ; Driver updates ; Upgrading versus downgrading -- Anti-Malware Software: Host-based ; Cloud/server-based ; Configuration backups ; Updating antivirus components ; Fixing an infected computer -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 15. Physical Security and Risk. Using hardware and software security devices -- Defining Firewalls: Network-based firewalls ; Host-based firewalls -- Firewall Technologies: Access control lists ; Port security ; Demilitarized zone ; Protocol switching ; Dynamic packet filtering ; Proxy services -- Firewalls at the Application Layer Versus the Network Layer: Stateful versus stateless network layer firewalls ; Application layer firewalls -- Scanning Services and Other Firewall Features: Content filtering ; Signature identification ; Context awareness ; Virtual wire versus routed ; Zones -- Intrusion Detection and Prevention Systems: Network-based IDS ; Host-based IDS ; Vulnerability scanners -- VPN concentrators -- Understanding Problems Affecting Device Security: Physical security ; Logical security configurations ; Risk-related concepts -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 16. Wide Area Networks. What's a WAN?: Defining WAN terms ; The public switched telephone network ; WAN connection types ; Bandwidth or speed -- T-Series Connections: The T1 connection ; The T3 connection -- Transmission Media: Wired connections ; Wavelength division multiplexing ; Passive optical network ; Wireless technologies -- Broadband Services: ; DSL technology and xDSL ; Cable modem -- Wireless WAN Technologies: Cellular WAN -- WAN Protocols: Integrated services digital network ; Frame relay technology ; Point-to-point protocol ; Asynchronous transfer mode ; MPLS -- WAN Troubleshooting: Loss of internet connectivity ; Interface errors/monitoring ; Split horizon ; DNS issues ; Router configurations ; Company security policy -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 17. Troubleshooting Tools. Protocol analyzers -- Throughput testers -- Connectivity software -- Using Traceroute -- Using ipconfig and ifconfig: Using the ipconfig utility ; Using the ifconfig utility -- Using the ping utility -- Using the Address Resolution Protocol: The Windows ARP table ; Using the arp utility -- Using the nslookup utility -- Resolving names with the hosts table -- Using the Mtr command (pathping) -- Using the route command: Using the route command options ; Some examples of the route command -- Using the nbtstat Utility: The -a switch ; The -A switch ; The -c switch ;The -n switch ; The -r switch ; The -R switch ; The -S switch ; The -s switch -- Using the netstat Utility: The -a switch ; The -e switch ; The -r switch ; The -s switch ; The -p switch ; The -n switch -- Using the File Transfer Protocol: Starting FTP and logging in to an FTP server ; Downloading files ; Uploading files -- Using the Telnet utility: How to enable Telnet in Windows ; Don't use Telnet, use secure shell -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 18. Software and Hardware Tools. Understanding Network Scanners: Packet sniffers/network monitors ; Intrusion detection and prevention software ; Port scanners ; Wi-Fi analyzer -- Baseline -- Network Monitoring and Logging: Network monitoring ; SNMP ; Syslog ; SIEM ; Utilization -- Identifying Hardware Tools: Cable testers ; Protocol analyzer ; Certifiers ; Time-domain reflectometer ; Optical time-domain reflectometer ; Multimeter ; Toner probe ; Butt set ; Punch-down tool ; Cable stripper/snips ; Voltage event recorder (power) ; Environmental monitors -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 19. Network Troubleshooting. Narrowing Down the Problem: Did you check the super simple stuff? ; Is hardware or software causing the problem? ; Is it a workstation or a server problem? ; Which segments of the network are affected? ; Is it bad cabling? -- Troubleshooting Steps: Step 1: Identify the problem ; Step 2: Establish a theory of probable cause ; Step 3: Test the theory to determine cause ; Step 4: Establish a plan of action to resolve the problem and identify potential effects ; Step 5: Implement the solution or escalate as necessary ; Step 6: Verify full system functionality, and if applicable, implement preventative measures ; Step 7: Document findings, actions, and outcomes -- Troubleshooting Tips: Don't overlook the small stuff ; Prioritize your problems ; Check the software configuration ; Don't overlook physical conditions ; Don't overlook cable problems ; Check for viruses -- Summary -- Exam essentials -- Written lab -- Review questions -- Ch. 20. Management, Monitoring, And Optimization. Managing Network Documentation: Using SNMP ; Schematics and diagrams -- Network Monitoring: Baselines ; On-boarding and off-boarding of mobile devices ; NAC ; Policies, procedures, and regulations ; Safety practices ; Implementing network segmentation -- Network Optimization: Reasons to optimize your network's performance ; How to optimize performance ; Unified communications ; Traffic shaping ; Load balancing ; High availability ; Caching engines ; Fault tolerance ; Archives/backups ; Common address redundancy protocol ; Virtual networking ; Locating and installing equipment ; Change management procedures -- Summary -- Exam essentials -- Written lab -- Review questions -- Appendix A: Answers To the Written Labs: Chapters: 1-7 ; Written Lab: 7.1 ; Written Lab: 7.2 ; Written Lab: 7.3 ; Chapters: 8-20 -- Answers to Review Questions: Chapters: 1-20 -- Appendix C: Subnetting Class A. Subnetting Practice Examples: Class A addresses: Practice Example #1A: 255.255.0.0 (/16) ; Practice Example #2A: 225.255.240.0 (/20) -- Practice Example #3A: 255.255.255.192 (/26) -- Subnetting in your head: Class A addresses -- Written Lab 1 -- Written Lab 2 -- Answers to Written Lab 1 -- Answers to Written Lab 2 -- Index.;