Key Takeaways
- Network security is a critical and growing sector of cybersecurity focused on protecting computer networks from threats such as malware, phishing and ransomware.
- Basic security measures — including strong passwords, firewalls, regular software updates and VPNs — form the foundation of any effective network security strategy.
- More advanced solutions such as network access control, behavioral analytics and data loss prevention offer deeper layers of protection for organizations with complex security needs.
- Network security is a fast-growing career field with a projected 29% growth through 2034.
- Popular roles in the field include Network Security Analyst, Network Security Engineer and Chief Information Security Officer.
Many of the day-to-day functions of society rely on digital infrastructure. Everything from methods of communication, financial transactions, healthcare access and transportation has been revolutionized by advancements in technology – and the trend shows no signs of slowing. With that comes an urgency for sophisticated network security solutions to protect against ever-evolving, cyber-related threats.
A 2022 survey by IBM shows that 83% of companies surveyed have experienced more than one data breach, putting money, personal data and valuable assets at risk.
In an effort to prioritize protection, businesses and organizations are investing heavily in network security, including the professionals needed to safeguard systems.
This guide will give you a better understanding of specific network security solutions, how to make a career of your own in the high-value field and planning next steps.
Understanding Network Security
Network security is a sector of cybersecurity that focuses on protecting computer networks from various threats, for example, malware, phishing, ransomware and more. Depending on the industry and system at risk, consequences can be severe, with information such as Social Security numbers, other personal identifying information, messages, login credentials and critical infrastructure targeted.
Network security is a means to prevent, detect and halt these attacks and thefts. In addition to the data at stake, there are also legal consequences for businesses and organizations that lack proper network security monitoring.
Network security is constantly evolving to keep up with tech developments. Today, artificial intelligence (AI) and machine learning (ML) play a crucial role in modern network security by cooperatively leveraging data analysis and pattern recognition to improve effectiveness.
A large part of network security is preparing for the future, including how to adapt with advancing technologies. Here are a few tech developments that need protecting:
- Internet of Things (IoT). A network of physical objects or “things” embedded with sensors, software and connectivity capabilities that enable them to collect and exchange data over the internet. Smart home devices, industrial machines and cars are all examples.
- 5G. Fifth generation cellular network technology used to support varying connectivity needs. This advancement can be used for everything from telemedicine to traffic signals, augmented reality, virtual reality and self-driving cars.
- Quantum Computing. A new type of computing that uses the principles of quantum mechanics to perform incredibly complex calculations much faster than traditional computers.
Basic Steps on How to Secure a Network
Consider these simple means of computer network security:
- Password and access control. Reliance on strong passwords and multi-factor authentication to access devices and accounts.
- Firewall deployment. Hardware or software used to restrict outside access to your network. This method mostly helps protect against malicious traffic, not programs that are installed (often with a trustworthy facade). Firewalls can be used in conjunction with antivirus software and other security measures.
- Regular software updates and patch management. Keeping software up to date ensures optimal performance while addressing security issues with the latest patch management strategies.
- Securing Wi-Fi networks. Change default passwords and use secure encryption methods, such as the latest version of WPA3, a mandatory certification for Wi-Fi CERTIFIED™ devices.
- Use of VPNs. A virtual private network (VPN), connects your computer to a remote server while encrypting your personal data and masking your IP address. Choosing a reliable VPN provider helps to keep your online presence private and secure.
Types of Network Security
The following are options for more advanced network security:
- Network Access Control (NAC). A security solution that allows for regulated network access based on predefined rules, allowing only authorized users and devices to connect. This is especially valuable for businesses with employees in remote or hybrid roles.
- Antivirus and Antimalware. Software that is able to detect, prevent and remove malicious software, such as viruses, worms, Trojans, spyware and ransomware, from computer systems and networks.
- Behavioral Analytics. The ability of devices that connect to the internet to track normal behavior and activity and be on the lookout for anything that deviates from it.
- Data Loss Prevention (DLP). One objective is to block access to data and alert system administrators when information is at risk. This is achieved through strategy and a set of tools that monitors data both at rest and in motion. It is known to assist in compliance with the Health Insurance Portability and Accountability Act (HIPAA).
- Secure Sockets Layer/Transport Layer Security (SSL/TLS). SSL and its successor, TLS, are cryptographic protocols that provide secure communication over a network. They encrypt data transmitted between a web browser and a server, ensuring that sensitive information remains confidential and protected from tampering. It is commonly used for securing web communication, such as online transactions and login credentials.
Making a Career in Network Security
Network security is a lucrative and growing career field. Through 2034, employment is projected to grow by 29%, much faster than the 5% average for all occupations. The median salary is $124,910. Some of the most popular roles in the field include:
| Job Title | Description | Average Annual Base Pay |
| Network Security Analyst | Safeguards an organization’s network, ensuring data is available when needed | $126,000 |
| Network Security Engineer | Designs and builds tools used to protect networks | $129,000 |
| Chief Information Security Officer | Oversees all technology across an organization at a high administrative level | $219,000 |
Those who succeed in computer network security tend to share a core set of skills and qualities:
- Technical expertise: Knowledge of systems, networks and programming
- Problem-solving: The ability to detect, investigate and resolve security threats
- Communication: Explaining complex security issues clearly to stakeholders
- Continuous learning: Staying current with evolving cybersecurity trends and threats
- Soft skills: Attention to detail, strong ethics and understanding of legal implications
- Resilience: The ability to work effectively under pressure
Developing these skills, and advancing your career in network security, requires an ongoing commitment to learning. This can include formal education, mentorship, internships and hands-on experience.
Education and Certifications for Network Security
There are several degree programs related to network security that have set students up for success. They include:
- Computer Science. Focuses on the theoretical and practical aspects of computer science and information technology.
- Cybersecurity. Focuses on protecting computer systems, networks and data from cyber threats, attacks and unauthorized access.
- Information Systems. Focuses on the study of technology and its applications in managing and utilizing information within organizations.
For working professionals looking to switch sectors or advance their network security career, USD offers a 100% online Master’s in Cyber Security Operations and Leadership and a Master’s in Cyber Security Engineering.
frequently asked questions
What certifications do you need for a network security career?
The certifications you need for a network security career depend on your experience level and career goals, but most professionals start with foundational networking and security credentials. CompTIA Network+ builds networking fundamentals, while CompTIA Security+ introduces core security concepts. Cisco’s CCNA is a common next step for infrastructure-focused roles. Mid-career options include CySA+ for security analysis and cloud-specific certifications as organizations move more workloads online. Advanced credentials such as CISSP are designed for experienced practitioners and require several years of professional experience.
What is zero trust, and how is it different from a firewall?
Zero trust is a security model that assumes no user, device or network connection should be trusted automatically, while a firewall controls traffic based on defined rules. A firewall creates a security boundary and filters network traffic, but traditional perimeter defenses often assume that activity inside the network is safer. Zero trust continuously verifies identity, device status and access permissions, even after a user or device has entered the environment.
Is a VPN enough to secure a network?
A VPN improves network security by encrypting traffic, but it is not enough to secure a network on its own. It protects data moving across untrusted connections and can help control remote access. However, it does not prevent compromised credentials, malware infections, unpatched vulnerabilities or excessive internal permissions. A VPN should be treated as one security control within a broader defense strategy.
What is network segmentation?
Network segmentation is the practice of dividing a network into separate zones to limit how far an attacker or security incident can spread. A compromised device in a guest network or unsecured IoT segment can be isolated from more sensitive systems, such as financial applications or confidential records. Segmentation is one of the most effective ways to reduce the impact of a breach.
What is the difference between a firewall and antivirus software?
The difference between a firewall and antivirus software is that firewalls control network traffic, while antivirus tools detect and remove malicious software on devices. Firewalls filter incoming and outgoing connections based on security rules. Antivirus and antimalware tools inspect files, applications and processes for signs of malicious activity. A firewall will not catch every malware infection, and antivirus software will not prevent all unauthorized network access.
