If you’re interested in the field of technology and are considering studying a Higher National Diploma in Networked Computer Systems Administration (ASIR) , you’ll find this topic particularly useful, as it forms part of the skills you’ll develop during your course.
What is network traffic?
Before discussing analysis, it is worth clarifying a basic concept: network traffic.
This refers to the set of data travelling through a network at any given moment. Every time you send an email, stream a video or download a file, that data travels in the form of packets through routers, switches and other devices.
We could compare it to car traffic in a city: some vehicles are light and fast, others heavier and slower; some carry critical goods, whilst others are simply driving along without any particular urgency. The same applies to data: not all traffic is equally important or requires the same level of security.
What does network traffic analysis involve?
Network traffic analysis is the process of observing, collecting and examining the data flowing through a network in order to identify patterns, detect anomalies and improve security.
Imagine you are a traffic warden on a motorway. Your job is not just to ensure that cars are moving, but to identify if any are travelling in the wrong direction, if there is a traffic jam, or if a vehicle is carrying dangerous goods.
That is exactly what network analysis does: it monitors the ‘digital motorway’ and takes action when something is amiss.
What is network traffic analysis used for?
Analysis fulfils very specific and essential functions:
- Threat detection
It enables the identification of cyber-attacks such as intrusions, malware, phishing attempts or unauthorised access. - Performance optimisation
If an application is consuming too much bandwidth, the analysis detects this and helps to balance resources. - Regulatory compliance
Many organisations are required to ensure the security of the data they manage (for example, under the GDPR in Europe). Analysis helps to ensure compliance with these regulations. - Troubleshooting
When the network slows down, administrators use the analysis to detect bottlenecks, configuration errors or device overload.
What is network traffic flow analysis?
Traffic flow refers to the path that data packets follow within a network. Analysing traffic flow means going beyond simply looking at the total volume: it involves examining how data travels, between which devices, in which direction and how frequently.
For example, if you notice on a corporate network that a large proportion of traffic is heading towards an unknown IP address in another country, this could be a sign of a data leak or that a device has been compromised.
Most commonly used tools for network traffic analysis
There are various tools available to facilitate this work. Some of the best-known in the sector are:
- Wireshark: probably the best-known tool. It allows you to capture and analyse packets in real time.
- SolarWinds NetFlow Traffic Analyzer: aimed at businesses, it offers detailed analysis and automated alerts.
- Nagios: widely used for network and system monitoring, with numerous add-ons.
- PRTG Network Monitor: stands out for its intuitive interface and customisation capabilities.
Each has its own advantages. The important thing is to understand that using these tools is one of the practical skills you will develop on courses such as the Advanced Diploma in ASIR at UAX.
The importance of network traffic analysis in cybersecurity
Nowadays, most cyberattacks do not occur in a single strike, but leave traces in network traffic: suspicious connections, malicious packets or unusual activity.
Network analysis is, therefore, a first line of defence. Thanks to it, you can:
- Prevent attacks before they cause any real damage.
- Respond quickly to incidents.
- Collect forensic evidence in the event of an investigation.
That is why leading cybersecurity firms such as Check Point and Fortinet emphasise its value as a critical tool in any digital defence strategy.
Connecting with your professional future at ASIR
If you’re interested in a career in IT, network traffic analysis isn’t just a theoretical concept: it will be part of your day-to-day work.
On the UAX’s Higher National Diploma in Networked Computer Systems Administration , you will learn to:
- Manage local area networks and network services.
- Configure systems to ensure they are secure and stable.
- Apply traffic analysis techniques to resolve incidents and prevent attacks.
- Use professional tools such as Wireshark or Nagios.
Furthermore, at UAX FP we offer you the opportunity to study this course in face-to-face and online , to suit your needs.
Once you’ve qualified, you’ll be able to work as a systems administrator, support technician or network specialist, or even make the leap into the world of cybersecurity.
Do it at UAX!
