Understanding OSI Layers (L1 to L7) - Bascom Computer Education

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CompTIA Network+

Curriculum

25 Sections
208 Lessons
10 Weeks

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The OSI Model and Encapsulation
4
- 1.1
  Understanding OSI Layers (L1 to L7)
- 1.2
  Encapsulation/Decapsulation Process
- 1.3
  Real-world Protocols in Each Layer
- 1.4
  Troubleshooting Using the OSI Model
Networking Appliances, Applications, and Functions
11
- 2.1
  Routers
- 2.2
  Switches
- 2.3
  Firewalls
- 2.4
  Load Balancers
- 2.5
  DHCP
- 2.6
  DNS
- 2.7
  NAT Devices
- 2.8
  Proxy Servers
- 2.9
  Gateways
- 2.10
  Content Filters
- 2.11
  Functional Placement in Network Design
Cloud Concepts
10
- 3.1
  IaaS Overview
- 3.2
  PaaS Overview
- 3.3
  SaaS Overview
- 3.4
  Cloud Deployment Models (Public)
- 3.5
  Cloud Deployment Models (Private)
- 3.6
  Cloud Deployment Models (Hybrid)
- 3.7
  Cloud Connectivity and Security
- 3.8
  Virtual NICs
- 3.9
  Virtual Firewalls
- 3.10
  SDN
Networking Ports, Protocols, Services, and Traffic Types
13
- 4.1
  HTTP
- 4.2
  HTTPS
- 4.3
  FTP
- 4.4
  SSH
- 4.5
  SMTP
- 4.6
  TCP
- 4.7
  UDP
- 4.8
  ICMP
- 4.9
  SNMP
- 4.10
  Application Layer Protocols
- 4.11
  Voice Traffic
- 4.12
  Video Traffic
- 4.13
  Data Traffic Patterns
Transmission Media and Transceivers
10
- 5.1
  Copper Cables (UTP)
- 5.2
  Copper Cables (STP)
- 5.3
  Copper Cables (Coaxial)
- 5.4
  Fiber Optics (Single-mode)
- 5.5
  Fiber Optics (Multi-mode)
- 5.6
  GBIC
- 5.7
  SFP
- 5.8
  QSFP
- 5.9
  Media Characteristics
- 5.10
  Media Limitations
Network Topologies, Architectures, and Types
14
- 6.1
  Star Topology
- 6.2
  Mesh Topology
- 6.3
  Bus Topology
- 6.4
  Ring Topology
- 6.5
  Hybrid Topology
- 6.6
  Client/Server Architecture
- 6.7
  Peer-to-Peer Architecture
- 6.8
  SOHO Networks
- 6.9
  Enterprise Networks
- 6.10
  Datacenter Networks
- 6.11
  WAN
- 6.12
  LAN
- 6.13
  MAN
- 6.14
  PAN
IPv4 Addressing
8
- 7.1
  IP Classes
- 7.2
  Reserved IP Ranges
- 7.3
  Subnetting
- 7.4
  Supernetting
- 7.5
  Private IPs
- 7.6
  Public IPs
- 7.7
  CIDR Notation
- 7.8
  VLSM
Evolving Use Cases
6
- 8.1
  IoT Integration
- 8.2
  Remote Work Networking
- 8.3
  Smart Devices
- 8.4
  Wearables
- 8.5
  Virtual Reality
- 8.6
  Augmented Reality
Routing Technologies
10
- 9.1
  Static Routing
- 9.2
  Dynamic Routing
- 9.3
  RIP
- 9.4
  OSPF
- 9.5
  EIGRP
- 9.6
  BGP
- 9.7
  Route Aggregation
- 9.8
  Route Redistribution
- 9.9
  Routing Tables
- 9.10
  Routing Metrics
Ethernet Switching Technologies
8
- 10.1
  VLANs
- 10.2
  Trunking
- 10.3
  STP
- 10.4
  RSTP
- 10.5
  MAC Address Tables
- 10.6
  ARP
- 10.7
  PoE
- 10.8
  Switch Stacking
Configure Wireless Devices and Technologies
13
- 11.1
  802.11a
- 11.2
  802.11b
- 11.3
  802.11g
- 11.4
  802.11n
- 11.5
  802.11ac
- 11.6
  802.11ax
- 11.7
  Frequencies
- 11.8
  Channels
- 11.9
  SSIDs
- 11.10
  WPA2 Encryption
- 11.11
  WPA3 Encryption
- 11.12
  Site Surveys
- 11.13
  AP Placement
Physical Installations
8
- 12.1
  Rack Systems
- 12.2
  Cable Management
- 12.3
  Labeling
- 12.4
  Grounding
- 12.5
  Environmental Considerations
- 12.6
  Cable Tester
- 12.7
  TDR
- 12.8
  Multimeter
Change Management
5
- 13.1
  Change Management
- 13.2
  Documentation Standards
- 13.3
  Inventory Management
- 13.4
  Asset Management
- 13.5
  Incident Reporting Procedures
Network Monitoring
8
- 14.1
  SNMP
- 14.2
  Syslog
- 14.3
  NetFlow
- 14.4
  Log Management
- 14.5
  Alert Systems
- 14.6
  Performance Baselines
- 14.7
  Performance Trends
- 14.8
  Centralized Monitoring
Disaster Recovery
8
- 15.1
  Redundancy Planning
- 15.2
  Failover Planning
- 15.3
  Backup Types
- 15.4
  Backup Scheduling
- 15.5
  Hot Site
- 15.6
  Warm Site
- 15.7
  Cold Site
- 15.8
  Business Continuity Plans (BCP)
IPv4 and IPv6 Network Services
7
- 16.1
  DHCP Configuration
- 16.2
  DNS Resolution
- 16.3
  IPv6 Features
- 16.4
  IPv6 Transition Techniques
- 16.5
  NDP
- 16.6
  SLAAC
- 16.7
  Tunneling Protocols
Network Access and Management Methods
6
- 17.1
  RADIUS
- 17.2
  TACACS+
- 17.3
  NAC
- 17.4
  Posture Assessment
- 17.5
  Remote Access VPNs
- 17.6
  Access Control Lists (ACLs)
Network Security Concepts
11
- 18.1
  Confidentiality
- 18.2
  Integrity
- 18.3
  Availability (CIA)
- 18.4
  Threats
- 18.5
  Vulnerabilities
- 18.6
  Risk
- 18.7
  Firewalls
- 18.8
  IDS
- 18.9
  IPS
- 18.10
  Endpoint Protection
- 18.11
  Network Protection
Types of Network Attacks
9
- 19.1
  DoS Attacks
- 19.2
  DDoS Attacks
- 19.3
  MITM Attacks
- 19.4
  ARP Poisoning
- 19.5
  DNS Spoofing
- 19.6
  Packet Sniffing
- 19.7
  Malware Injections
- 19.8
  Insider Attacks
- 19.9
  Physical Attacks
Network Security Features
7
- 20.1
  VPN
- 20.2
  VLAN
- 20.3
  MAC Filtering
- 20.4
  Device Hardening
- 20.5
  Patch Management
- 20.6
  Firmware Updates
- 20.7
  Port Security
A Network Troubleshooting Methodology
6
- 21.1
  Identify the Problem
- 21.2
  Establish a Theory
- 21.3
  Test the Theory
- 21.4
  Establish a Plan
- 21.5
  Verify
- 21.6
  Document
Troubleshoot Common Cabling Problems
8
- 22.1
  Crosstalk
- 22.2
  EMI
- 22.3
  Attenuation
- 22.4
  Split Pairs
- 22.5
  Open Faults
- 22.6
  Short Faults
- 22.7
  Connector Issues
- 22.8
  Pinout Issues
Troubleshoot Common Issues with Network Services
3
- 23.1
  DNS Failures
- 23.2
  DHCP Conflicts
- 23.3
  IP Addressing Errors
Troubleshoot Common Performance Issues
5
- 24.1
  High Latency
- 24.2
  Jitter
- 24.3
  Packet Loss
- 24.4
  Bandwidth Bottlenecks
- 24.5
  Duplex Mismatches
Network Troubleshooting Tools
10
- 25.1
  Ping
- 25.2
  Traceroute
- 25.3
  Nslookup
- 25.4
  Wireshark
- 25.5
  Packet Captures
- 25.6
  Cable Testers
- 25.7
  Tone Generators
- 25.8
  OTDR
- 25.9
  ipconfig
- 25.10
  netstat

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Encapsulation/Decapsulation Process

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