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What are the best ways to become an expert in network segmentation?

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Network segmentation is the practice of dividing a network into smaller subnets, each with its own security policies and access controls. It can improve network performance, security, and scalability, but it also requires a lot of planning, design, and management skills. If you want to become an expert in network segmentation, here are some of the best ways to learn and practice this valuable skill.

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Gideon Ackney

Certified AppSec Practitioner ||Penetration Tester || SSCP || Incide?t Response || CNSP ||CTF Player || THM 1% ||…

1 Learn the basics

Before you dive into network segmentation, you need to understand the fundamentals of network architecture, protocols, and devices. You should be familiar with the concepts of IP addressing, routing, switching, VLANs, firewalls, and VPNs. You should also know how to use network tools such as ping, traceroute, ipconfig, and netstat. These skills will help you to troubleshoot and configure network segments effectively.

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Gideon Ackney

Certified AppSec Practitioner ||Penetration Tester || SSCP || Incide?t Response || CNSP ||CTF Player || THM 1% || Security Analyst
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Grasp core networking concepts: Understand the basics of network protocols (TCP/IP), network devices (routers, switches, firewalls), and network security principles. Master network segmentation fundamentals: Learn about different segmentation strategies (VLANs, ACLs, DMZs), segmentation benefits (improved security, performance, manageability), and segmentation best practices.

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2 Study network segmentation models

There are different ways to segment a network, depending on the size, complexity, and objectives of the organization. Some of the common network segmentation models are the flat network, the hierarchical network, the zone-based network, and the microsegmentation network. You should study the advantages and disadvantages of each model, and how they apply to different scenarios and use cases. You should also learn how to design and implement each model using appropriate network devices and software.

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Gideon Ackney

Certified AppSec Practitioner ||Penetration Tester || SSCP || Incide?t Response || CNSP ||CTF Player || THM 1% || Security Analyst
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Explore various network segmentation models: Research and understand the purposes and functionalities of models like: Flat network: Simplest model, but offers minimal security and manageability. VLAN-based segmentation: Isolates traffic based on VLAN membership, improving security and manageability. Policy-based segmentation: Uses security policies to control traffic flow, offering granular control and flexibility. Zero-trust segmentation: Assumes no inherent trust within the network, requiring explicit authorization for all communication.

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3 Practice network segmentation skills

The best way to become an expert in network segmentation is to practice your skills in a realistic and challenging environment. You can use network simulators, such as Packet Tracer, GNS3, or EVE-NG, to create and test network segments with different configurations and requirements. You can also use online labs, such as Cisco DevNet Sandbox, to access real network devices and software for network segmentation. You can also join online communities, such as Reddit, Stack Overflow, or Network Engineering, to ask questions and share your solutions with other network professionals.

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Gideon Ackney

Certified AppSec Practitioner ||Penetration Tester || SSCP || Incide?t Response || CNSP ||CTF Player || THM 1% || Security Analyst
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Set up a home lab: Simulate different network segmentation scenarios using virtual machines or inexpensive hardware. This allows you to experiment with configurations and gain practical experience. Participate in online labs and challenges: Many platforms offer online labs and challenges specifically focused on network segmentation, providing a safe environment to test your skills and knowledge.

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Adrian-Cristian Nicolaescu, PhD

Senior Researcher in the fields of Distributed Data and Information Management, Networked and Edge Computing, Edge Intelligence and Distributed Storage and Computing Systems
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Set up something at home, work on code splitting and modularisation and possibly look at how DevOps, NetOps and AIOps (depending on needs, work and/or interests) are organised and done. Some nice tools for slicing, management and orchestration to look at should be Terraform, OpenStack, OSM, K8s deployment mechanics, like Ansible and Kubespray. Other interesting, (programming/development operations infrastructure) automation tools to look at: Ansible (again, yes), Argo, Bash After, you can look at the previously-mentioned network tracing, monitoring and diagnosis tools, towards automating responses even.

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4 Keep up with network security trends

Network segmentation is closely related to network security, as it can help to prevent or limit the impact of cyberattacks, such as malware, ransomware, or denial-of-service. Therefore, you should keep up with the latest network security trends, such as zero trust, software-defined networking, or cloud-native networking. You should also learn how to use network security tools, such as Nmap, Wireshark, or Snort, to monitor and analyze network traffic and detect anomalies or threats.

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Gideon Ackney

Certified AppSec Practitioner ||Penetration Tester || SSCP || Incide?t Response || CNSP ||CTF Player || THM 1% || Security Analyst
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Continuously follow network security developments: Stay informed about emerging threats, vulnerabilities, and security best practices relevant to network segmentation. This ensures your approach remains effective in the face of evolving threats.

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5 Get network certifications

One of the most effective ways to demonstrate your expertise in network segmentation is to get network certifications from reputable organizations, such as Cisco, CompTIA, or Microsoft. These certifications can validate your knowledge and skills in network segmentation, as well as other network topics, such as network design, network management, or network troubleshooting. Some of the popular network certifications that cover network segmentation are Cisco CCNA, CompTIA Network+, or Microsoft AZ-104.

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Gideon Ackney

Certified AppSec Practitioner ||Penetration Tester || SSCP || Incide?t Response || CNSP ||CTF Player || THM 1% || Security Analyst
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Pursue relevant certifications: While not mandatory, earning industry-recognized certifications can validate your expertise and enhance your resume. Consider options like: CompTIA Security+: Covers foundational security concepts, including network segmentation. Cisco Certified Network Associate (CCNA Security): Focuses on Cisco-specific network security solutions, including segmentation using Cisco technologies. Certified Information Systems Security Professional (CISSP): Offers broad knowledge in various information security domains, including network segmentation best practices.

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Gideon Ackney

Certified AppSec Practitioner ||Penetration Tester || SSCP || Incide?t Response || CNSP ||CTF Player || THM 1% || Security Analyst
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Pursue relevant certifications: While not mandatory, earning industry-recognized certifications can validate your expertise and enhance your resume. Consider options like: CompTIA Security+: Covers foundational security concepts, including network segmentation. Cisco Certified Network Associate (CCNA Security): Focuses on Cisco-specific network security solutions, including segmentation using Cisco technologies. Certified Information Systems Security Professional (CISSP): Offers broad knowledge in various information security domains, including network segmentation best practices.

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6 Teach network segmentation skills

Finally, one of the best ways to become an expert in network segmentation is to teach your skills to others. Teaching can help you to reinforce your understanding, improve your communication, and expand your network. You can teach network segmentation skills in various ways, such as creating a blog, a podcast, a video, or a course. You can also mentor, coach, or tutor other network learners or professionals who want to learn network segmentation skills.

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Gideon Ackney

Certified AppSec Practitioner ||Penetration Tester || SSCP || Incide?t Response || CNSP ||CTF Player || THM 1% || Security Analyst
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Teach others about network segmentation: By explaining concepts to others, you solidify your understanding and identify areas needing further exploration. Consider mentoring, blogging, or participating in online communities.

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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Gideon Ackney

Certified AppSec Practitioner ||Penetration Tester || SSCP || Incide?t Response || CNSP ||CTF Player || THM 1% || Security Analyst
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Engage with the IT community: Connect with other network security professionals through online forums, conferences, and meetups. This allows you to learn from their experiences, share knowledge, and stay updated on the latest advancements. Stay curious and keep learning: The field of network security is constantly evolving. Maintain a growth mindset and actively seek out new learning opportunities to stay ahead of the curve.

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What are the best ways to become an expert in network segmentation?

1

2

3

4

5

6

7

1 Learn the basics

2 Study network segmentation models

3 Practice network segmentation skills

4 Keep up with network security trends

5 Get network certifications

6 Teach network segmentation skills

7 Here’s what else to consider

Computer Networking

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What are the best ways to become an expert in network segmentation?

1

2

3

4

5

6

7

1 Learn the basics

2 Study network segmentation models

3 Practice network segmentation skills

4 Keep up with network security trends

5 Get network certifications

6 Teach network segmentation skills

7 Here’s what else to consider

Computer Networking

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