Lesson 1 of CompTIA Network+ covers the OSI (Open Systems Interconnection) and TCP/IP models. The lesson introduces the OSI model and its seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

It explains the purpose and functions of each layer and the role of switching and routing components. The lesson also discusses network boundaries, Layer 2 devices, and the IEEE 802 standards. A summary video of the OSI model is provided for further understanding.

By the end of the lesson, learners will have a solid grasp of the OSI model and its significance in network communication.

Lesson 2 of CompTIA Network+ covers media types, access methods, Ethernet standards, and network interface configuration. It explains concepts like signaling, modulation, bandwidth, collision domains, and MAC addresses. It also introduces Ethernet standards like Fast Ethernet, Gigabit Ethernet, and 10GbE.

Students will learn about configuring network interfaces, handling ARP, and using packet sniffers for network monitoring. Lab activities offer practical experience in exploring the lab environment and configuring Ethernet networking.

Lesson 3 of CompTIA Network+ covers the installation and configuration of switched networks, including hubs, bridges, switches, network topologies, and network types. It provides knowledge on setting up and managing these components effectively for efficient network operations.

Lesson 4 of CompTIA Network+ covers topics such as configuring IPv4 addressing components, testing IP interfaces with command line tools, configuring IPv4 subnets, setting up private and public IPv4 addressing schemes, configuring IPv6 addressing components, and setting up DHCP services. Lab activities are included for hands-on practice.

Lesson 5 of CompTIA Network+ covers the characteristics of routing, including routing decisions, routing tables, and path selection. It explains packet delivery, static and default routes, learned routes and algorithms, and routing algorithm metrics.

The lesson also introduces dynamic routing protocols such as Routing Information Protocol (RIP), Enhanced Interior Gateway Routing Protocol (EIGRP), Open Shortest Path First (OSPF), and Border Gateway Protocol (BGP). It covers router installation and configuration, including the use of network operating systems (NOS) and appliance routers.

The lesson concludes with a lab activity on configuring routing.

Lesson 6 of CompTIA Network+ covers the uses of ports and protocols, including Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). It also discusses port scanners and protocol analyzers, such as netstat and Wireshark, for monitoring network traffic.

The use of name resolution services, such as DNS, is explained, along with configuring DNS and IPAM services. The lesson includes lab activities with port scanning tools and configuring DNS servers.

Lesson 7 of CompTIA Network+ covers network application and storage issues.

Topics include the uses of network applications like SMB, NTP, HTTP, SSL/TLS, SMTP, and HTTPS. It also explores voice services, advanced networking devices, and protocols like VoIP, PBX, SIP, RTP, and QoS. Additionally, it discusses virtualization, network storage services, and technologies like NAS, SAN, Fibre Channel, and iSCSI.

Lab activities and videos are included for practical application and further explanation of specific topics.

Lesson 8 of CompTIA Network+ covers various topics, including network interface and log monitoring, performance and health monitoring tools, traffic analysis tools, host and interface monitoring metrics, SNMP agent configuration, and logs.

Additionally, the lesson delves into network troubleshooting methodology, explaining the steps involved in identifying and resolving network issues. Common network service issues, such as end-to-end connectivity, hardware failure, IP configuration, duplicate IP and MAC addresses, netmask and gateway problems, switching and routing issues, DHCP, name resolution, and DNS configuration issues, are also addressed.

The lesson includes lab activities and videos to enhance learning.

This lesson covers common networking attacks and their mitigations. It begins by discussing security basics, exploits, and vulnerabilities. Various types of attacks are explored, including reconnaissance attacks, spoofing, man-in-the-middle attacks, ARP and DNS poisoning attacks, Denial of Service (DoS) attacks, Distributed DoS (DDoS) attacks, and amplification attacks.

The characteristics of VLANs are then explained, covering network segmentation, static and dynamic VLAN membership, VLAN assignment issues, trunking, tagged and untagged ports, default and native VLANs, VLAN hopping attacks, and VLAN Trunking Protocol (VTP).

Finally, the lesson explores the characteristics of Network Address Translation (NAT) and Port Forwarding, including DMZs, Access Control Lists (ACLs), DMZ topologies, and port address translation.

Lesson 10 of CompTIA Network+ begins with an introduction to firewalls and proxies, explaining their uses and types such as packet filtering, stateful inspection, NGFW/Layer 7, network-based, and application-based firewalls.

The lesson also covers forward and reverse proxy servers, content filters and provides a video on firewall and ACL configuration, as well as one on IP tables. Common issues with misconfigured firewalls and ACLs are discussed. Then, the lesson moves on to explaining the uses of IDS/IPS and UTM, including network-based intrusion detection/prevention systems, anti-virus scanners, unified threat management, and host-based IDS/IPS.

Signature management and file integrity monitoring are also mentioned. The lesson includes a lab activity on configuring a NAT firewall.

This lesson covers authentication controls, directory services, port security, network device hardening, patch management, and vulnerability scanning. Topics include authentication attacks, protocols, and methods, port security measures, device hardening guidelines, and patching processes. It provides an overview of securing network resources and mitigating vulnerabilities.

Lesson 12 of CompTIA Network+ includes topics such as structured cabling systems, twisted-pair cabling, testing and troubleshooting, and fiber optic cabling. The lesson also covers cable types, connectors, termination standards, and tools used in these deployments.

Lesson 13 of CompTIA Network+ covers implementing and troubleshooting wireless technologies, including installation, configuration, and troubleshooting of wireless networks. It addresses topics such as IEEE 802.11 wireless standards, infrastructure topologies, wireless site design, antenna types, wireless security, and troubleshooting wireless performance and connectivity issues.

Lesson 14 of CompTIA Network+ covers the comparison and contrast of WAN technologies. It includes WAN core service types like PSTN, T-Carrier, and Leased Lines, as well as WAN subscriber service types such as DSL, Cable Broadband, and Dial-Up Services.

The lesson also explores WAN framing service types like HDLC, Frame Relay, ATM, and MPLS. Additionally, it covers wireless and IoT WAN technologies like Cellular Radio, Microwave Satellite, and various wireless protocols.

Lesson 15 of CompTIA Network+ focuses on using remote access methods. The lesson covers two main topics: remote access VPNs and remote access management methods.

You can explore the use of remote access VPNs. It introduces remote access services (RAS), tunneling/encapsulation, and different VPN topologies such as SSL/TLS/DTLS VPNs and IPSec. It also covers IPSec transport and tunnel modes, Internet Key Exchange (IKE), L2TP, IKE v2, Dynamic Multipoint VPN (DMVPN), and VPN concentrators.

You can also delve into remote access management methods. It discusses Telnet, Secure Shell (SSH), SSH client authentication, SSH commands, Remote Desktop Protocol (RDP), Virtual Network Computing (VNC), out-of-band management methods, console cable, console routers, management URL, File Transfer Protocol (FTP), SSH FTP (SFTP), and FTP over SSL (FTPS).

The lesson includes a lab activity on configuring secure access channels.

The lesson also explores WAN framing service types like HDLC, Frame Relay, ATM, and MPLS. Additionally, it covers wireless and IoT WAN technologies like Cellular Radio, Microwave Satellite, and various wireless protocols.

Lesson 16 of CompTIA Network+ covers site policies and best practices. Topics include managing networks with documentation and diagrams, purposes of physical security devices, comparing business continuity and disaster recovery concepts, and identifying policies and best practices.

The lesson emphasizes change management, inventory management, resiliency strategies, backup management, and various security policies such as incident response, data security, and password policies.