CompTIA Network+ Study Guide

Name: CompTIA Network+ Study Guide | Exam N10-009
Brand: Polity
Price: 35.99 EUR
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Exam N10-009

Todd Lammle Jon Buhagiar(Autor*in)

Polity (Verlag)

6. Auflage

Erschienen am 17. April 2024

1024 Seiten

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978-1-394-23562-9 (ISBN)

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Inhalt

Cover
Title Page
Copyright Page
Acknowledgments
About the Authors
About the Technical Editor
Contents at a Glance
Contents
Table of Exercises
Introduction
What Is the Network+ Certification?
Why Become Network+ Certified?
How to Become Network+ Certified
Tips for Taking the Network+ Exam
Who Should Read This Book?
What Does This Book Cover?
What's Included in the Book
Interactive Online Learning Environment and Test Bank
How to Use This Book
N10-009 Exam Objectives
Objective Map
Assessment Test
Answers to Assessment Test
Chapter 1 Introduction to Networks
First Things First: What's a Network?
The Local Area Network
Common Network Components
Network Types
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
They're Just Cables, Right?
Selecting the Right Topology
The Network Backbone
Network Segments
Service-Related Entry Points
Service Provider Links
Virtual Networking
Three-Tiered Model
Spine and Leaf
Traffic Flow
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 2 The Open Systems Interconnection (OSI) Reference Model
Internetworking Models
The Layered Approach
Advantages of Reference Models
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
Chapter 3 Networking Connectors and Wiring Standards
Physical Media
Coaxial Cable
Twisted-Pair Cable
Twinaxial Cable
Fiber-Optic Cable
Transceivers
Media Converters
Serial Cables
Cable Properties
Transmission Speeds
Distance
Duplex
Noise Immunity (Security, EMI)
Frequency
Wiring Standards
T568A vs. T568B
Straight-Through Cable
Crossover Cable
Rolled/Rollover Cable
T1 Crossover Cable
Installing Wiring Distributions
MDF/IDF
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 4 The Current Ethernet Specifications
Network Basics
Ethernet Basics
Collision Domain
Broadcast Domain
CSMA/CD
Broadband/Baseband
Bit Rates vs. Baud Rate
Wavelength
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
Chapter 5 Networking Devices
Common Network Connectivity Devices
Network Interface Card
Hub
Bridge
Switch
Router
Firewall
IDS/IPS
HIDS
Access Point
Wireless Range Extender
Wireless LAN Controller
Load Balancer
Contention Methods
Dynamic Host Configuration Protocol Server
IPAM
Other Specialized Devices
Multilayer Switch
Domain Name System Server
Network Time Protocols
Proxy Server
Encryption and Content Filtering
Analog Modem
Packet Shaper
VPN Concentrator/Headend
Media Converter
VoIP PBX
VoIP Endpoint
NGFW/Layer 7 Firewall
VoIP Gateway
Cable Modem
DSL Modem
Networked Devices
VoIP Phones
Printers
Physical Access Control Devices
Cameras
Heating Ventilation, and Air Conditioning (HVAC) Sensors
Internet of Things (IoT)
Industrial Control Systems
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
Chapter 6 Introduction to the Internet Protocol
Introducing TCP/IP
A Brief History of TCP/IP
The DoD Model and TCP/IP
The Process/Application Layer Protocols
The Host-to-Host Layer Protocols
The Internet Layer Protocols
Data Encapsulation
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 7 IP Addressing
IP Terminology
The 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 Address Autoconfiguration (SLAAC)
DHCPv6 (Stateful)
Migrating to IPv6
Summary
Exam Essentials
Written Labs
Written Lab 7.1
Written Lab 7.2
Review Questions
Chapter 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
Chapter 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
Chapter 10 Routing Protocols
Routing Protocol Basics
Administrative Distances
Classes of Routing Protocols
Distance-Vector Routing Protocols
Routing Information Protocol (RIP)
RIP Version 2 (RIPv2)
VLSMs and Discontiguous Networks
EIGRP
Border Gateway Protocol (BGP)
Link-State Routing Protocols
Open Shortest Path First (OSPF)
Intermediate System-to-Intermediate System (IS-IS)
High Available Routes
Advanced IPv6 Concepts
Router Advertisement
Neighbor Discovery Protocol
Tunneling
Dual Stack
IPv6 Routing Protocols
RIPng
EIGRPv6
OSPFv3
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 11 Switching and Virtual LANs
Networking Before Layer 2 Switching
Switching Services
Limitations of Layer 2 Switching
Bridging vs. LAN Switching
Three Switch Functions at Layer 2
Distributed Switching
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
Routing Between VLANs
VLAN Trunking Protocol
VTP Modes of Operation
Do We Really Need to Put an IP Address on a Switch?
Switch Port Protection
Port Bonding
Device Hardening
Advanced Features of Switches
Power over Ethernet (802.3af, 802.3at)
Port Mirroring/Spanning (SPAN/RSPAN)
Jumbo Frames
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 12 Wireless Networking
Introduction to Wireless Technology
Cellular Technologies
The 802.11 Standards (Regulatory Impacts)
2.4 GHz (802.11b)
2.4 GHz (802.11g)
5 GHz (802.11a)
5 GHz (802.11h)
2.4 GHz/5 GHz (802.11n)
5 GHz (802.11ac)
Wi-Fi 6 (802.11ax)
Comparing 802.11 Standards
Range and Speed 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 identifier (BSSID)
Wireless Controllers
Guest Networks
Captive Portals
Mobile Hot Spots
Signal Degradation
Technologies That Facilitate the Internet of Things (IoT)
Installing and Configuring WLAN Hardware
Site Survey
Exercise 12.2
Providing Capacity
Multiple Floors
Location-Based WLAN
Site Survey Tools
Wireless Security
Wireless Threats
Open Access
Service Set Identifiers, Wired Equivalent Privacy, and Media Access Control Address Authentication
Geofencing
Remote Authentication Dial-In User Service (802.1X)
Temporal Key Integrity Protocol
Wi-Fi Protected Access or WPA2 Pre-Shared Key
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 13 Remote Network Access
Site-to-Site VPN
Client-to-Site VPN
Clientless VPN
Split Tunnel vs. Full Tunnel
Remote Desktop Connection
Remote Desktop Protocol
RDP Gateway
Virtual Network Computing
Virtual Desktop
Connection Methods
Secure Shell
Graphical User Interface
Application Programming Interface
Console/Rolled Serial Cable
Jump Box/Host
Where Should You Implement a Jump Box/Host?
In-Band vs. Out-of-Band Management
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 14 Using Statistics and Sensors to Ensure Network Availability
Performance Monitoring/Metrics/Sensors
Device/Chassis
Network Metrics
Additional Monitoring Solutions
Baseline Metrics
Traffic Analysis
Performance Monitoring
Availability Monitoring
Configuration Monitoring
SNMP
Agent
NMS
Commands
Community Name
Versions
OIDs and the MIB
Authentication
Application Programming Interface Integration
Protocol Analyzer/Packet Capture
Port Mirroring
Flow Data
Log Aggregation
Network Device Logs
Log Reviews
Syslog
SIEM
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 15 Organizational Documents and Policies
Plans and Procedures
Change Management
Incident Response Plan
Disaster Recovery Plan
Business Continuity Plan
Inventory Management
System Life Cycle
Standard Operating Procedures
Hardening and Security Policies
Acceptable Use Policy
Password Policy
Bring Your Own Device Policy
Remote Access Policy
Onboarding and Offboarding Policy
Patch Management
Driver/Firmware Updates
Security Policy
Data Loss Prevention
Common Documentation
Physical Network Diagram
Logical Network Diagram
Wiring Diagram
Layered Network Diagram
Site Survey Report
Audit and Assessment Report
Baseline Configurations
IP Address Management
Common Agreements
Nondisclosure Agreement
Service-Level Agreement
Memorandum of Understanding
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 16 High Availability and Disaster Recovery
Load Balancing
Multipathing
Network Interface Card (NIC) Teaming
Redundant Hardware/Clusters
Switches
Routers
Firewalls
Servers
Clusters
Mean Time to Repair
Mean Time Between Failure
Facilities and Infrastructure Support
Uninterruptible Power Supply
Power Distribution Units
Generator
HVAC
Fire Suppression
Redundancy and High Availability Concepts
Disaster Recovery Sites
Active/Active vs. Active/Passive
Backups
Network Device Backup/Restore
Recovery
Testing
Tabletop Exercises
Validation Tests
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 17 Data Center Architecture and Cloud Concepts
Cloud Computing
Characteristics of a Cloud
Cloud Delivery Models
Types of Services
Network Function Virtualization
Virtual Private Cloud
Connectivity Options
Cloud Gateways
Multitenancy
Elasticity
Scalability
Network Security Groups
Network Security Lists
Security Implications/Considerations
Relationship Between Local and Cloud Resources
Infrastructure as Code
Automation/Orchestration
Source Control
Software-Defined Networking
Benefits of Software-Defined Networking
Components of Software-Defined Networking
Virtual Extensible Local Area Network
Layer 2 Encapsulation Limitations Addressed by VXLAN
Data Center Interconnect
Zero Trust Architecture
Policy-Based Authentication
Authorization
Least Privilege Access
Secure Access Secure Edge/Security Service Edge
SASE
SSE
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 18 Network Troubleshooting Methodology
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?
Cable Considerations
Cable Application
Troubleshooting Steps
Step 1: Identify the Problem
Step 2: Establish a Theory of Probable Cause
Step 3: Test the Theory to Determine the 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 Implement Preventative Measures if Applicable
Step 7: Document Findings, Actions, Outcomes, and Lessons Learned Throughout the Process
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
Chapter 19 Network Software Tools and Commands
Software Tools
Protocol Analyzer/Packet Capture
Bandwidth Speed Testers
Port Scanners
NetFlow Analyzers
Trivial File Transfer Protocol Server
Connectivity Software
IP Scanner
Using traceroute
Using ipconfig, ifconfig, and ip
Using the ipconfig Utility
Using the ifconfig Utility
Using the ip Utility
Using the iptables Utility
Examples of iptables
Using the ping Utility
The Address Resolution Protocol
The Windows ARP Table
Using the arp Utility
Using the nslookup Utility
Resolving Names with the Hosts File
Using the mtr Command (pathping)
Using the Nmap Utility
Using the route Command
Using the route Command Options
Some Examples of the route Command
Using the netstat Utility
The -e Switch
The -r Switch
The -s Switch
The -p Switch
The -n Switch
Using tcpdump
Examples of Using tcpdump
Basic Networking Device Commands
show running-config (Show Run)
show config
Cisco Discovery Protocol
show ip route (route Command in Windows)
show version
show inventory
show switch
show mac-address-table
show interface
show arp
show vlan
show power
Hardware Tools
Toner/Toner Probe
Cable Tester
Taps
Wi-Fi Analyzers
Visual Fault Locator
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 20 Network Security Concepts
Common Security Terminology
Threats and Risk
Vulnerability
Exploit
Confidentiality, Integrity, and Availability
Encryption
Certificates
AAA Model
Authentication
Authorization
Accounting
Regulatory Compliance
Policies, Processes, and Procedures
Audit
Summary
Exam Essentials
Written Lab
Review Questions
Chapter 21 Common Types of Attacks
Technology-Based Attacks
Denial of Service/Distributed Denial of Service
DNS Poisoning/Spoofing
VLAN Hopping
ARP Spoofing/Poisoning
Rogue Devices and Services
Password Attacks
MAC Spoofing
IP Spoofing
MAC Flooding
Malware
Human and Environmental
Social Engineering
Phishing
Environmental
Hardening Security
Device Gardening
Key Management
Access Control Lists
Content Filtering
Implementing Network Segmentation
Network Segmentation Enforcement
Screened Subnet
802.1X
NAC
MAC Filtering
Port Security
Internet of Things
Industrial Control Systems/Supervisory Control and Data Acquisition
Separate Private/Public Networks
Honeypot/Honeynet
Bring Your Own Device
Guest Network Isolation
Physical Security Concepts
Video Surveillance
Door Locks
Equipment Locks
Summary
Exam Essentials
Written Lab
Review Questions
Appendix A: Answers to Written Labs
Chapter 1: Introduction to Networks
Chapter 2: The Open Systems Interconnection (OSI) Reference Model
Chapter 3: Networking Connectors and Wiring Standards
Chapter 4: The Current Ethernet Specifications
Chapter 5: Networking Devices
Chapter 6: Introduction to the Internet Protocol
Chapter 7: IP Addressing
Chapter 8: IP Subnetting, Troubleshooting IP, and Introduction to NAT
Chapter 9: Introduction to IP Routing
Chapter 10: Routing Protocols
Chapter 11: Switching and Virtual LANs
Chapter 12: Wireless Networking
Chapter 13: Remote Network Access
Chapter 14: Using Statistics and Sensors to Ensure Network Availability
Chapter 15: Organizational Documents and Policies
Chapter 16: High Availability and Disaster Recovery
Chapter 17: Data Center Architecture and Cloud Concepts
Chapter 18: Network Troubleshooting Methodology
Chapter 19: Network Software Tools and Commands
Chapter 20: Network Security Concepts
Chapter 21: Common Types of Attacks
Appendix B: Answers to ReviewQuestions
Chapter 1: Introduction to Networks
Chapter 2: The Open Systems Interconnection (OSI) Reference Model
Chapter 3: Networking Connectors and Wiring Standards
Chapter 4: The Current Ethernet Specifications
Chapter 5: Networking Devices
Chapter 6: Introduction to the Internet Protocol
Chapter 7: IP Addressing
Chapter 8: IP Subnetting, Troubleshooting IP, and Introduction to NAT
Chapter 9: Introduction to IP Routing
Chapter 10: Routing Protocols
Chapter 11: Switching and Virtual LANs
Chapter 12: Wireless Networking
Chapter 13: Remote Network Access
Chapter 14: Using Statistics and Sensors to Ensure Network Availability
Chapter 15: Organizational Documents and Policies
Chapter 16: High Availability and Disaster Recovery
Chapter 17: Data Center Architecture and Cloud Concepts
Chapter 18: Network Troubleshooting Methodology
Chapter 19: Network Software Tools and Commands
Chapter 20: Network Security Concepts
Chapter 21: Common Types of Attacks
Appendix C: Subnetting Class A
Subnetting Practice Examples: Class A Addresses
Practice Example #1A: 255.255.0.0 (/16)
Practice Example #2A: 255.255.240.0 (/20)
Practice Example #3A: 255.255.255.192 (/26)
Subnetting in Your Head: Class A Addresses
Written Lab C.1
Written Lab C.2
Answers to Written Lab C.1
Answers to Written Lab C.2
Index
Online Test Bank

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