CompTIA Network+ Study Guide 2026: Complete Free Preparation Guide
Master the CompTIA Network+ certification with this comprehensive study guide. According to PrepForCerts analysis, candidates who follow a structured study plan with hands-on practice achieve a 90% first-attempt pass rate. This guide covers everything from subnetting fundamentals to advanced troubleshooting.
8-12
Weeks Average Study Time
90
Questions in 90 Minutes
$358
Exam Cost (2026)
720
Passing Score (out of 900)
Network+ Exam Domains
The Network+ exam validates your ability to design, configure, manage, and troubleshoot wired and wireless networks. Here's the complete domain breakdown:
Networking Fundamentals (23%)
OSI and TCP/IP models, network topologies, cable types (Cat5e/Cat6/Cat6a/fiber), connectors, Ethernet standards, and IP addressing. Master the 7 OSI layers and their protocols—this is tested heavily.
Network Implementations (19%)
Routing concepts (static, dynamic, OSPF, EIGRP), switching (VLANs, STP, port configuration), wireless standards (802.11ax/Wi-Fi 6E), and WAN technologies (MPLS, SD-WAN, VPN). Know how to configure and verify these technologies.
Network Operations (16%)
Network monitoring tools (SNMP, syslog, NetFlow), documentation practices, change management, high availability (load balancing, clustering), and disaster recovery planning. Understand baseline establishment and capacity planning.
Network Security (19%)
Security concepts (CIA triad), attack types (DoS, MITM, phishing), hardening techniques, ACLs, firewalls, IDS/IPS, and remote access security (VPN types, 802.1X). Know common vulnerabilities and mitigations.
Network Troubleshooting (23%)
CompTIA troubleshooting methodology, diagnostic tools (ping, traceroute, nslookup, netstat), cable testing, wireless issues, and performance problems. This domain is crucial—expect many scenario-based questions.
Essential Ports and Protocols
Memorize these ports—they appear on nearly every Network+ exam. According to PrepForCerts analysis, knowing these accounts for 15-20% of exam questions.
Port
Protocol
Service
TCP/UDP
20/21
FTP
File Transfer Protocol
TCP
22
SSH/SFTP
Secure Shell / Secure FTP
TCP
23
Telnet
Remote Terminal (insecure)
TCP
25
SMTP
Email Sending
TCP
53
DNS
Domain Name System
TCP/UDP
67/68
DHCP
Dynamic IP Assignment
UDP
80
HTTP
Web Traffic
TCP
110
POP3
Email Retrieval
TCP
143
IMAP
Email Sync
TCP
161/162
SNMP
Network Management
UDP
389
LDAP
Directory Services
TCP/UDP
443
HTTPS
Secure Web Traffic
TCP
445
SMB
Windows File Sharing
TCP
3389
RDP
Remote Desktop
TCP
10-Week Study Plan (Recommended Schedule)
This plan assumes 10-15 hours per week. Subnetting practice should be incorporated daily from Week 2 onward.
Week 1-2: Networking Fundamentals
OSI model (7 layers) and TCP/IP model (4 layers)
Network topologies: star, mesh, bus, ring, hybrid
Cable types: Cat5e, Cat6, Cat6a, fiber optic (single vs multimode)
Connectors: RJ-45, RJ-11, LC, SC, ST, MTRJ
Hands-on: Practice cable termination (T568A/T568B), use a cable tester
Hands-on: Practice troubleshooting scenarios systematically
Week 10: Review & Practice Tests
Take 3-5 full-length practice exams (target 85%+)
Review weak areas identified by practice tests
Practice Performance-Based Questions (PBQs)
Review all ports, protocols, and acronyms
Schedule exam when consistently scoring 85%+
Subnetting Quick Reference
Master this table—subnetting questions are guaranteed on the exam:
CIDR
Subnet Mask
Hosts
Block Size
/24
255.255.255.0
254
256
/25
255.255.255.128
126
128
/26
255.255.255.192
62
64
/27
255.255.255.224
30
32
/28
255.255.255.240
14
16
/29
255.255.255.248
6
8
/30
255.255.255.252
2
4
Study Resource Comparison
Resource
Cost
Format
Best For
Rating
Professor Messer Videos
Free
Video
Visual learners
⭐⭐⭐⭐⭐
Mike Meyers Book
$40-50
Book
Deep understanding
⭐⭐⭐⭐⭐
Cisco Packet Tracer
Free
Lab Software
Hands-on practice
⭐⭐⭐⭐⭐
Exam Cram Book
$30-40
Book
Quick review
⭐⭐⭐⭐
PrepForCerts Practice Tests
Free/Paid
Practice Tests
Exam simulation
⭐⭐⭐⭐⭐
Frequently Asked Questions
How long does it take to study for Network+?
Most candidates need 8-12 weeks with 1-2 hours of daily study. Those with A+ certification or networking experience may finish in 4-6 weeks. Complete beginners without IT background should plan for 12-16 weeks.
What is the most important topic for Network+?
Subnetting is the single most critical skill—practice until you can subnet without a calculator in under 30 seconds. Other essential topics include the OSI model, common ports/protocols, and the CompTIA troubleshooting methodology.
Do I need A+ before Network+?
A+ is not required but provides helpful foundational knowledge. Network+ assumes basic IT understanding. If you're completely new to IT, consider A+ first. IT professionals can start directly with Network+.
What labs should I practice for Network+?
Use Cisco Packet Tracer (free) for network simulation. Practice: subnetting calculations, VLAN configuration, DHCP/DNS setup, ACL creation, wireless security configuration, and cable termination (T568A/B).
Is Network+ harder than A+?
Network+ is generally considered more difficult due to abstract concepts like subnetting, routing protocols, and the OSI model. The pass rate is slightly lower (~70% vs ~75%). However, methodical study and hands-on practice make it manageable.
Ready to Start Practicing?
Test your networking knowledge with Smart Practice practice questions.