CN
NETWORKING · CCNA FOUNDATION COURSE

CCNA: Introduction
to Networks

Build your networking career foundation. From OSI model and TCP/IP to IP addressing, subnetting, routing, switching, and network security — everything you need for the CCNA exam and real-world networking roles.

View All 17 Modules
17
MODULES
90+
LABS
70h
CONTENT
FREE
FOREVER
OSI Model
TCP/IP
IP Addressing
Subnetting
Routing
Switching
Network Security
IPv6
Cisco IOS
🔢 Subnet Calculator
🌐
PHASE 1 · MODULES 1–3
Network Fundamentals
How networks work, how data is packaged and sent, and the protocols that make communication possible.
MODULE 01
Networking Today
How networks connect us, network components, topologies, LAN/WAN, internet connections, reliability, trends, and security basics.
⏱️ 2h 🟢 Beginner▶ Start
MODULE 02
Basic Switch & End Device Configuration
Cisco IOS access, command modes, IOS navigation, command structure, device configuration, passwords, saving configs, IP addressing.
⏱️ 3h 🟢 Beginner▶ Start
MODULE 03
Protocols and Models
Communication rules, protocol suites, TCP/IP, OSI reference model, data encapsulation and de-encapsulation, Layer 2 & 3 addresses.
⏱️ 3.5h 🟢 Beginner▶ Start
📋
Checkpoint Exam 1: Basic Network Connectivity & Communications
Test your understanding of modules 1–3 before proceeding
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🔌
PHASE 2 · MODULES 4–7
Physical & Data Link
From cables and signals to Ethernet frames, MAC addresses, and how switches forward traffic.
MODULE 04
Physical Layer
Physical layer purpose and characteristics, copper cabling (UTP, STP, coax), fiber-optic cabling, wireless media, standards.
⏱️ 3h 🟡 Beginner+▶ Start
MODULE 05
Number Systems
Binary number system and IPv4 addresses, binary-to-decimal conversions, hexadecimal system and IPv6 addresses, conversions.
⏱️ 2h 🟡 Beginner+▶ Start
MODULE 06
Data Link Layer
Data link layer purpose, IEEE 802 sublayers, topologies (WAN & LAN), half/full duplex, CSMA/CD, CSMA/CA, data link frames.
⏱️ 2.5h 🟡 Beginner+▶ Start
MODULE 07
Ethernet Switching
Ethernet frames, MAC addresses (unicast/broadcast/multicast), MAC address table, switch learning, frame forwarding methods, duplex.
⏱️ 3h 🟡 Intermediate▶ Start
📋
Checkpoint Exam 2: Ethernet Concepts
Test your understanding of modules 4–7 before proceeding
Take Exam →
🔀
PHASE 3 · MODULES 8–10
Network Layer & Routing
How packets travel across networks — IP, ARP, routing tables, and configuring your first router.
MODULE 08
Network Layer
Network layer characteristics, IPv4 packet header, IPv6 packet overview, host routing decisions, default gateway, static & dynamic routing.
⏱️ 3h 🟡 Intermediate▶ Start
MODULE 09
Address Resolution
MAC vs IP addressing, ARP overview and operation, ARP broadcasts, ARP spoofing, IPv6 Neighbor Discovery protocol and NDP messages.
⏱️ 2.5h 🟡 Intermediate▶ Start
MODULE 10
Basic Router Configuration
Initial router settings, configure interfaces, verification commands, default gateway on hosts and switches, connect a router to a LAN.
⏱️ 3h 🟡 Intermediate▶ Start
📋
Checkpoint Exam 3: Communicating Between Networks
Test your understanding of modules 8–10 before proceeding
Take Exam →
📡
PHASE 4 · MODULES 11–13
IP Addressing
Master IPv4 subnetting, IPv6 addressing, and network diagnostic tools (ICMP, ping, traceroute).
MODULE 11
IPv4 Addressing
IPv4 address structure, subnet masks, prefix length, AND operation, unicast/broadcast/multicast, public vs private IPs, subnetting, VLSM.
⏱️ 5h 🔴 Intermediate+▶ Start
MODULE 12
IPv6 Addressing
IPv4 limitations, IPv6 address formats, omitting zeros, address types (GUA/LLA/multicast), SLAAC, DHCPv6, EUI-64, IPv6 subnetting.
⏱️ 4h 🔴 Intermediate+▶ Start
MODULE 13
ICMP
ICMPv4 and ICMPv6 messages, host reachability, destination unreachable, time exceeded, ping and traceroute testing and troubleshooting.
⏱️ 2h 🟡 Intermediate▶ Start
📋
Checkpoint Exam 4: IP Addressing
Test your understanding of modules 11–13 before proceeding
Take Exam →
🔗
PHASE 5 · MODULES 14–15
Transport & Application Layer
TCP, UDP, port numbers, the three-way handshake, and the application-layer services powering the web.
MODULE 14
Transport Layer
TCP vs UDP, TCP features and header fields, UDP features, port numbers, socket pairs, three-way handshake, flow control, reliability.
⏱️ 4h 🟡 Intermediate▶ Start
MODULE 15
Application Layer
Application, Presentation & Session layers, peer-to-peer networks, web/email/DNS protocols, DHCP, FTP, HTTP, HTTPS, file sharing services.
⏱️ 3h 🟡 Intermediate▶ Start
📋
Checkpoint Exam 5: Network Application Communications
Test modules 14–15
Take Exam →
🛡️
PHASE 6 · MODULES 16–17
Security & Small Network Design
Defend networks against real threats and apply everything to design, build, and troubleshoot a small business network.
MODULE 16
Network Security Fundamentals
Security threats and vulnerabilities, malware, reconnaissance/access/DoS attacks, defense-in-depth, firewalls, SSH, AAA, device hardening.
⏱️ 4h 🔴 Important▶ Start
MODULE 17
Build a Small Network
Small network topologies, device selection, redundancy, applications/protocols, scaling, verify connectivity, troubleshooting methodologies, debug command.
⏱️ 5h 🔴 Capstone▶ Start
📋
Checkpoint Exam 6: Building & Securing a Small Network
Final checkpoint before the course final exam
Take Exam →
🏆
Course Final Exam
Complete all 17 modules and checkpoints, then take the final exam to earn your BitWithBite CCNA Foundations certificate.
Take Practice Final → ← Back to Courses