CompTIA Network+ (N10-009) Full Course & Practice Exam

Explore network components and how data travels, including clients, servers, hubs, switches, wireless access points, routers, firewalls, load balancers, proxies, ids, ips, nas, san, media, and wan links.

Explain how client-server networks centralize resources, backup, and scalability with load balancing, while peer-to-peer networks offer low-cost, infrastructure-free sharing but suffer decentralized management and poor scalability.

Explore network geography from personal area networks to wide area networks, outlining PAN, LAN, CAN, MAN, and WAN with examples like Bluetooth and USB.

Explore wireless topologies, infrastructure mode, ad hoc, and wireless mesh, and see how mesh blends wifi, microwave, cellular, and satellite for redundant connectivity in disaster or humanitarian missions.

Explore the OSI model and its seven layers—from physical to application—and learn encapsulation, decapsulation, TCP/IP relation, and Wireshark packet capture analysis.

Explore layer 3 routing, including IPv4/IPv6 logical addressing, route discovery, and dynamic protocols like RIP, OSPF, and EIGRP. Identify routers and multilayer switches, and understand packet switching and ICMP tools.

Explore layer 4 transport concepts, comparing TCP and UDP, including the three-way handshake, reliability, windowing, buffering, and the impact on streaming and devices like load balancers and firewalls.

Explore the session layer's role in establishing, maintaining, and tearing down conversations to prevent data intermingling, using H.323, NetBIOS, and RTP for voice, video, and file sharing.

Explore layer 7, the application layer, its services and service advertisements, covering email protocols (POP3, IMAP, SMTP), web protocols (HTTP/HTTPS), DNS, FTP/FTPS/SFTP, and remote access tools.

Explore how encapsulation and decapsulation wrap data with layer-specific headers across the OSI model, enabling delivery via TCP/UDP, IP, and MAC headers from application to link.

Learn how Wireshark analyzes network traffic across the OSI model, examining frames, Ethernet, IPv4, TCP, and HTTP/FTP data to interpret real-world communications.

Master ports and protocols, including well-known, registered, and dynamic port ranges, and core services like http/https, smtp, ftp, ssh, dns, and dhcp, plus network scanning with nmap.

Explore how IP addresses and ports route data to the proper application by examining well-known, registered, and ephemeral port ranges, with examples like HTTP, FTP, SMTP, and IANA's role.

Explore how the transmission control protocol ensures reliable, ordered data delivery via packetization, error checking, acknowledgement, three-way handshake, and flow control with windowing and ports.

Learn how UDP provides a lightweight, connectionless transport with fast delivery, using small headers, datagrams, and ports for time-sensitive applications like streaming and DNS lookups.

Explore web ports 80 and 443, HTTP versus HTTPS, and how SSL/TLS encryption secures data while improving SEO trust through secure redirection.

Master email ports and protocols, including SMTP, SMTPS, POP3, and IMAP, and discover how secure variants like POP3S and IMAPS protect messages in transit.

Explore network service ports and protocols that enable device discovery and management. Cover DNS 53 (UDP/TCP), DHCP 67/68, SQL 1433/3306, SNMP 161/162, and syslog 514 (UDP/TCP).

Discover how to scan a remote server for open ports with Nmap and Zenmap, identify listening services and the operating system, and reveal running application versions.

Explore media and cabling by comparing copper, fiber, and radio frequency media; review connectors like RJ45, RJ11, F-Type, BNC, fiber types (single-mode, multi-mode), transceivers, and how to create patch cables.

Explore copper network connections such as RJ-11, RJ-45, F-type, and BNC. Explain how RG-6 and RG-59 coaxial cables differ and their uses for voice, data, cable TV, and CCTV.

Wire copper cables with 568A and 568B pinouts to create straight-through and crossover patch cables. Test with a cable tester to verify DTE and DCE connections.

Explore fiber media fundamentals, compare single-mode and multi-mode fiber, and learn how light transmission, distance, emi immunity, and installation cost shape enterprise network deployments.

Understand cable distribution systems, including cables, wall jacks, patch panels, and distribution frames, to ensure reliable network communication; learn wiring, toner probe testing, and power and HVAC considerations.

Explore how a hierarchical cable distribution system links demarcation point, MDF, IDFs, and wall jacks. Compare copper and fiber cabling, patch panels, and racks that protect equipment and enable moves.

Configure network wiring using patch panels, punch down blocks, and keystone wall jacks, connect to switches, and maintain a clean, labeled rack for scalable cabling.

Explore how HVAC systems safeguard data centers by maintaining steady temperatures and humidity. Learn to implement hot and cold aisles, raised floors, and plenums for efficient cooling.

Explore data center fire suppression options, including wet pipe, pre-action, and clean agent systems. Use clean agent systems to avoid water damage, with alarms and supplemental oxygen when needed.

Explore wireless networks, including ad hoc and infrastructure modes, antennas, frequencies, and 802.11 standards, with hands-on security demos of open and encrypted networks from WEP to WPA3.

Explore wireless network types - ad hoc (ibss), infrastructure with bssid and ssid (ess/essid), point-to-point links, and mesh networks - and distinguish autonomous from lightweight access points.

Explore omnidirectional, unidirectional, and Yagi antennas, and learn how their directionality and range affect wireless access point coverage, point-to-point links, and overall network performance.

Discover how omnidirectional antennas serve wireless devices, and how unidirectional, parabolic, Yagi, and apache antennas shape range, direction, and security considerations for wireless networks.

Explore wireless frequencies across 2.4, 5, and 6 GHz bands, including channel widths, overlaps, channel bonding, and features like dynamic frequency selection, transmit power control, and band steering.

Explore the evolution of wireless standards from 802.11a to ax, including 2.4 and 5 GHz bands, speeds, and MIMO and MU-MIMO technologies.

Secure wireless networks by evaluating authentication and encryption, from pre-shared keys to 802.1X with a RADIUS server, and note vulnerabilities like initialization vectors, WPS, and move from WEP to WPA3.

Demonstrates how a 24-bit initialization vector weakness makes WEP insecure; illustrates capturing data, cracking a WEP key, and gaining access, and advocates upgrading to WPA2.

Understand captive portals as authentication gateways for guest networks, enforcing terms of service and data collection, with branding and compliance considerations. Design and test user-friendly, secure portals across devices.

Explore ethernet switching at layer two, covering switches, hubs, and bridges, VLANs, STP, and MTU, while applying NAC and security concepts to defend ethernet networks.

Explore ethernet fundamentals, CSMA/CD collision handling, and how switches reduce collision domains to maximize efficiency in modern layer 2 local area networks.

Identify network infrastructure devices such as hubs, bridges, switches, and routers, and understand how they manage collision and broadcast domains across layer two switching and layer three routing.

See how a single device combines a router, switch, and wireless access point with a wide-area network connection. Learn how media converters enable HDMI over Cat5 for long-distance video.

Learn how virtual local area networks create logical, cross-switch segments and separate broadcast domains to improve security, performance, and management, using VLAN tagging, trunking, and switch virtual interfaces.

Learn how the spanning tree protocol (802.1d) prevents switching loops by electing a root bridge and using root, designated, and non-designated ports with blocking, listening, learning, and forwarding states.

Explore network access control, including port security, mac filtering, and 802.1x, and how bring-your-own-device policies, quarantine, and time-, location-, role-, and rule-based controls secure networks.

Tune the maximum transmission unit, the largest frame size, to balance efficiency and overhead; use 1500 for wired, 1400–1420 for wireless or PPPoE, and 9000 for jumbo frames.

Explore IPv4 addressing, including dotted-decimal notation, octets, and 32-bit space; learn how subnet masks divide networks into network and host portions, and distinguish classful subnet masks from classless CIDR notation.

Explore IPv4 address types, public versus private addresses, loopback 127.0.0.1, APIPA 169.254.x.x, and NAT translation. Memorize RFC 1918 private ranges (10.x, 172.16–172.31, 192.168) and DHCP with DORA for exam readiness.

Explore how IPv4 addresses are assigned, comparing static and dynamic methods, and learn how DHCP, scope, leases, APIPA, and ZeroConf automate network configuration.

Learn how computers use binary numbering and convert between decimal and binary using a powers-of-two chart, applying it to IPv4 octets and decimal values like 150 and 167.

Master subnetting by learning how to borrow host bits, create subnets with classful and classless masks, and apply CIDR and VLSM to efficient IP addressing.

Master subnetting by hand with subnetting gloves, memorizing power-of-two values to determine subnets and hosts quickly from /24 to /32, with practical examples.

Explore IPv6 data flows: unicast to individual hosts, multicast to a group, and anycast that updates routers by routing to the nearest gateway.

Learn how IPv4 and IPv6 coexist on the same network through dual stack, tunneling, and NAT64, enabling backward compatibility during the transition.

Explore how routers route traffic between subnets, separate broadcast domains, and apply layer 3 routing with routing tables, NAT, multicast, GRE, PIM, and protocols like RIP, OSPF, and BGP.

Explore how routers route traffic between subnets and between internal and external networks, separating broadcast domains as Layer 3 devices, and transition from MAC to IP addressing with ARP.

Explore how routers use routing tables to decide destinations, map IPs to MACs with ARP, and choose directly connected, static, and dynamic routes with costs, prefixes, and default 0.0.0.0/0.

Explore internal and external routing protocols, comparing distance-vector and link-state approaches with RIP, OSPF, IS-IS, EIGRP, and BGP, including convergence, cost, and autonomous systems.

Explore route selection and administrative distance to determine the most believable path across routers, comparing directly connected, static, EIGRP, OSPF, and RIP, with route metrics like hop count and bandwidth.

Explore how NAT and PAT address IPv4 exhaustion by translating private IPs to public IPs, and how dynamic NAT, static NAT, and port address translation work.

Explore routing redundancy protocols, including HSRP, VRRP, and GLBP, and learn how they use virtual IPs and subinterfaces to ensure reliability, load balancing, and seamless failover.

Learn how routers route packets across subnets using static routing in a four-router network with Cisco Packet Tracer, including 10.0.0.0/30 and 192.168.1.0/24.

Explore how multicast routing uses igmp and pim to deliver one copy to interested receivers, detailing igmp versions 1–3, join/leave, source-specific multicast, and pim-dm vs pim-sm.

Explore generic routing encapsulation (GRE) as a tunneling protocol that encapsulates diverse network layer protocols in a virtual point-to-point link over ip networks at layer 3.