Top 10 Networking Tools Every Tech Professional Should Know

Key takeaways

• Learn ping, traceroute and Wireshark first, because they show reachability, the path of packets and what is actually inside the traffic.
• Use tcpdump on servers with no GUI, capture there, then open the file in Wireshark for deeper analysis.
• Troubleshoot in order: confirm reachability with ping, find the stalled hop with traceroute, then measure with iperf3 or inspect packets.

You do not need every tool at once. You need a small, reliable set you can reach for when a connection is slow, a service is unreachable, or something on the network looks wrong. Here is what each tool is for, when to use it, and where it fits in a troubleshooting workflow.

The tools at a glance

Start with the three that teach you the most

If you are new, learn these before anything else. They map directly onto how a network works, so they build intuition you reuse everywhere.

ping

ping sends ICMP echo requests and reports whether a host answers and how long it takes. It is almost always the first command to run. A reply means the host is up and the path works; timeouts or high round-trip times point you at where to look next.

ping -c 4 example.com

traceroute

traceroute (tracert on Windows) shows every router hop between you and a destination, with the latency at each one. When a site is slow or unreachable but the host itself is up, traceroute tells you whether the problem is near you, near the destination, or somewhere in between.

traceroute example.com

Wireshark

Wireshark captures traffic and lets you read it packet by packet, with filters so you see only what matters. It is the tool that turns "the connection is weird" into "the server is sending a TCP reset after the TLS handshake". Capture only on networks you are authorised to monitor, and use a display filter such as ip.addr == 10.0.0.5 to cut the noise.

Discovery and inventory

Nmap is the standard for finding what is on a network and which ports are open. Run it only against hosts you own or are authorised to scan, because unsolicited scanning of third-party networks can be treated as hostile and is unlawful without permission. A plain host-and-port scan looks like this:

nmap -sV 192.168.1.0/24

Angry IP Scanner is a lighter, GUI alternative for a quick "what is alive in this range" sweep. Netcat fills the gaps: a one-line way to check whether a TCP port accepts connections, move a file across a lab link, or test a service by hand. Netcat is often flagged by antivirus because attackers misuse it for remote shells; that is a reason to understand it, not to avoid it, and to expect alerts when you run it.

Performance and capture on servers

iperf3 measures real throughput, jitter and loss between two machines, which is how you prove whether a "slow network" is actually the network or something above it. You run a server on one host and a client on the other. tcpdump is Wireshark's command-line cousin: on a headless server you capture with tcpdump, then open the resulting file in Wireshark on your laptop.

tcpdump -i eth0 -w capture.pcap host 10.0.0.5

Vulnerability scanning and remote access

OpenVAS (now part of Greenbone) scans hosts against a large feed of known vulnerabilities and produces a prioritised report. It belongs in authorised assessments of your own estate, not pointed at systems you do not control. PuTTY on Windows and OpenSSH everywhere give you encrypted remote access; prefer SSH over Telnet always, since Telnet sends everything, including passwords, in clear text.

What is a simple troubleshooting order?

1. ping the target. No reply? Check whether it is down or just blocking ICMP.
2. traceroute to see where the path breaks or slows.
3. Nmap (on your own hosts) to confirm the service is actually listening.
4. Wireshark or tcpdump to read what the two sides are actually saying to each other.
5. iperf3 if the question is throughput rather than reachability.

Nine problems in ten are solved by the first three steps.

Where should you go next?

These tools make far more sense once you understand how traffic is layered and routed. Build that foundation, then practise each tool in a lab you own. If you are working toward a networking or security role, structured training ties the theory and the tools together.

Related reading

• What is the best way to track network latency and identify routing issues using tools like ping, traceroute, and MTR?
• Top 14 Network Tools and Software in 2026 (Free & Paid) for Network Security and Monitoring
• How Ethical Hackers Use Netcat for Network Debugging: Features, Commands and Defence