Comprehensive solution to latency in high-speed networks

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If you've ever clicked a mouse, spoken during a video call, or made a pass in an online video game and noticed a delay in the response , what you're experiencing isn't a lack of speed, but latency . In high-speed networks, especially those with fiber optic connections, data centers, and cloud services, latency has become a major bottleneck for homes, businesses, and ISPs alike.

While we often focus solely on download and upload speeds, the reality is that a connection can have high bandwidth and still deliver a terrible experience due to ping . This article provides a comprehensive guide explaining what latency is, what causes it, how to measure it with various tools, the scenarios in which it's critical (gaming, video calls, IoT, remote work, data centers, ISPs), and, most importantly, how to reduce it with practical solutions for both home and professional environments.

What is latency (ping) and why does it matter so much?

Latency is the time it takes for a data packet to travel from your device (PC, mobile, console, server, etc.) to its destination (web server, game server, VoIP server, cloud server, etc.) and back. It's measured in milliseconds (ms), and the closer it is to 1 ms, the better. This is what most people call ping.

Unlike speed (the amount of data per second), latency indicates how long it takes for information to start flowing . A fiber connection can have 1 Gbps and still feel sluggish or choppy if the latency is high or unstable.

We can talk about several types of delays which, added together, form the total latency of a packet:

• Processing delay: the time it takes each network device (router, switch, firewall…) to examine the header, check for errors and decide where to send the packet.
• Queue delay: waiting for the packet in the outgoing queue when the link is busy.
• Transmission delay: the time it takes for the packet to leave through the link, usually in FIFO order.
• Propagation delayThe speed of light is the physical time it takes for a bit to travel through the medium (copper pair, coaxial cable, fiber optic cable). It will always be less than or equal to the speed of light and increases with distance.

Total latency is the sum of all these components, and when a router or link is saturated, packets accumulate in a buffer. If this buffer bloat is excessive, latency increases dramatically, packet loss occurs , and the experience becomes unbearable.

In your day-to-day life you'll notice high latency because WhatsApp messages take a long time to arrive, websites load slowly despite having good speed, online games freeze or stutter, IP cameras or IoT devices respond late, and in general, all browsing feels "sluggish".

Recommended ping values ​​according to usage

Not all applications require the same quality. Some services are very sensitive to latency, while others tolerate considerable latency without the user noticing. As a general reference, we could consider a ping to be:

• Less than 20 msExcellent. Ideal for competitive gaming, demanding video calls, and real-time professional use.
• Between 20 and 50msVery good. Perfect for gaming, live streaming, or working remotely without any noticeable lag.
• Between 50 and 100msAcceptable. You can play games and make video calls, although there may be some occasional minor delays.
• Between 100 and 300msBad. There are noticeable delays in games and video calls; the experience is becoming annoying.
• more than 300ms: practically unplayable and very inconvenient for any interactive application.

In online games, the demands are especially high. For shooters or racing games, the ideal is to keep 30-50 ms . A similar level is desired for online sports games (FIFA, etc.). In MMOs or turn-based strategy games, 150-200 ms is reasonable, and even higher if the actions aren't strictly real-time.

In video calls, a ping below 40 ms gives the feeling of a natural conversation, without people talking over each other. Up to about 100 ms you can work without too many problems, but beyond that, the delay between audio and video starts to disrupt the flow of the meeting.

In data center environments, financial transactions, corporate VoIP or synchronization between sites, latency is a critical parameter: a few milliseconds can represent a loss of competitiveness or non-compliance with SLA.

Common causes of high latency

The final latency is the result of a combination of internal factors (user equipment, local network, security settings, etc.) and external factors (operator, internet routes, geographical distance, global congestion, access type, etc.). Understanding these factors helps determine where to address the problem.

Type of connection and technology used

Not all access technologies offer the same base latency. Broadly speaking, we can order them as follows:

• Fiber optic (FTTH)Very low latency and high bandwidth. It's the ideal choice for home users, businesses, and data centers.
• Cable: moderate latency, sensitive to congestion during peak hours.
• ADSL / DSL: more latency and less capacity; exceeding 70-100 ms is common.
• 5G: significant improvement over 4G in latency, although it depends heavily on cell coverage and saturation.
• 4G / 3GHigh and unstable ping, not ideal for demanding gaming.
• Satellite: very high latencies (hundreds of ms) due to the enormous distance the signal must travel.

In companies and ISPs, the gradual migration to fiber infrastructures and high-capacity dedicated links is the basis for keeping latency under control in the medium and long term.

Geographic distance and network routes

The physical distance between the source and destination increases propagation delay, even over fiber optics. Connecting to a server in your country is not the same as connecting to one located on another continent. Each hop (intermediate router) adds a few milliseconds, and if the routes are not optimal, latency can skyrocket.

To reduce this impact, large operators and data centers resort to:

• Spine-and-leaf or CLOS architectures within data centers, which minimize the number of internal hops.
• Peering and direct interconnection with other operators, IXPs and cloud providers, avoiding detours through the public Internet.
• CDNs and content caches, which bring static data closer to end users.

In your day-to-day life, this translates to choosing nearby servers whenever possible (for example, the European region if you are in Europe) for both games and SaaS applications and cloud services.

Congestion and available bandwidth

When too many devices use the same network or link at the same time, congestion occurs. Traffic begins to accumulate in the buffers of routers and switches, increasing queuing delay and generating jitter (unpredictable latency variations).

This occurs both on your home network (multiple downloads, 4K streaming, cloud backups, etc.) and on your ISP's network during peak hours. While increasing bandwidth doesn't directly reduce latency, it does help prevent bottlenecks in high-demand scenarios.

In business and ISP environments, congestion is addressed with:

• capacity planning (Do not overload trunk links).
• QoS and critical traffic prioritization (voice, video, transactions).
• Load balancing and SD-WAN to distribute traffic across multiple routes.

WiFi network, coverage and interference

The wireless component is one of the weakest points when it comes to latency in home and office networks . A weak signal, many neighboring networks on the same channel, or clients far from the access point cause retransmissions, low modulation rates , and consequently, more delay.

Some key aspects of WiFi that influence latency are:

• Bad coverageThe further you are from the router, the worse the synchronization speed and the longer the time it takes to send each packet.
• Interferences: especially in 2,4 GHz, which has a longer range and overlaps with many neighboring networks.
• Slow customers: old devices or devices with poor coverage that "slow down" other customers sharing the air.

To mitigate this, many routers incorporate technologies like Airtime Fairness , which distribute transmission time between fast and slow clients so that the former are not penalized as much. Furthermore, the 5 GHz band—and in the future, the 6 GHz band with WiFi 6E—offers less interference and, therefore, more stable latency.

If your house is large or has many walls, you may need repeaters, WiFi Mesh systems or PLC with integrated WiFi to bring coverage to all rooms without latency skyrocketing.

Background traffic, updates, and P2P

In many cases, high ping is not due to the operator or the router, but to programs that consume bandwidth in the background : automatic Windows updates, cloud backups, P2P downloads, file synchronization, streaming in other rooms, etc.

If your connection isn't particularly fast or your router doesn't handle queues well, that parallel traffic can increase your latency and jitter, making online games unplayable or causing interruptions in video conferences.

Malware and misconfigured security software

A computer infected with malware can consume a lot of CPU and network resources (for example, by being part of a botnet, mining cryptocurrency, or sending spam), resulting in slow response times even with a good connection. Furthermore, all the malicious traffic competes with your legitimate usage.

On the other hand, firewalls and antivirus software are essential, but if they are misconfigured or overloaded, they can inspect every packet with excessive rules and introduce additional delays . In enterprise networks, it is crucial to properly configure policies and disable advanced features (DPI, content filtering, parental controls) on computers or segments where low latency is a priority.

Use of VPNs and proxies

VPNs and proxy servers are very useful for improving privacy, encrypting traffic, or bypassing geo-restrictions, but they require packets to first travel to an intermediate server, be processed, and then reach their final destination. All that extra routing increases latency, especially if the node is far away or overloaded.

In general, if you're aiming for the lowest possible ping, you shouldn't use a VPN or proxy while gaming or performing lag-sensitive tasks. If you have no other option, opt for well-sized paid services with servers close to your location and good routing (for example, NordVPN or ExpressVPN versus overloaded free VPNs).

Specific factors in companies and ISPs

In the professional world, things get more complicated: latency not only affects convenience, but also productivity, business continuity, and cybersecurity . Some additional causes in this context are:

• Inefficient network designs: too many hops, suboptimal routing, lack of peering.
• Lack of management systems (ISMS) aligned with standards such as ISO 27001 that consider the impact of latency on critical processes.
• Poor monitoringBottlenecks, jitter, or problematic routes are not detected until the user complains.
• Obsolete network equipment: switches and routers without support for 10/40/100 Gbps or advanced QoS, which become the weak link.

How to reliably measure latency

Before you start troubleshooting, it's a good idea to confirm whether there really is a high ping problem and where it's occurring: on your local network, your router, your internet service provider, or the internet itself. There are many tools available for this, ranging from basic ones to professional monitoring solutions.

Ping command

The classic tool, found on any operating system, is ping . It sends ICMP Echo Request packets to an IP address or domain and measures how long it takes for ICMP Echo Replies to return. It can also indicate packet loss.

In Windows, simply open the command prompt (cmd) and type:

• ping 192.168.1.1 (or your router's IP address) to measure latency on your local network.
• ping 8.8.8.8 (Google DNS) or any website to measure latency to the Internet.

The `-t` parameter lets you send a continuous ping and see how the time changes over time. The `-n X` parameter defines the number of packets. This is the easiest way to detect if the latency is stable or if there is significant jitter.

WinMTR and traceroute-type tools

WinMTR combines ping and traceroute logic to show, at a glance, where traffic is passing through and the latency at each hop. It's very useful for determining if the problem lies with your router, the first node of your ISP, somewhere in between, or near the destination server.

It's simple to use: enter a host or IP address, press Start, and the program will accumulate statistics on minimum, average, and maximum latency, as well as the percentage of packets lost per hop. You can leave it running for hours to detect intermittent problems and export the results in HTML.

NetworkLatencyView and TCP Measurement

NetworkLatencyView, from NirSoft, listens to the system's TCP connections and calculates the latency for each one, displaying up to 10 measurements and their average. It works similarly to ping, but is geared towards real-world application traffic (web browsing, services, etc.).

You need WinPcap or packet capture methods to sniff the traffic. This is very useful for seeing, for example, how well the servers of certain websites or SaaS services you use daily are performing.

NetScan Tools, PingPlotter and other graphic utilities

There are a variety of graphical tools available for measuring latency, performing traceroutes, DNS queries, and basic network analysis, such as NetScan Tools Basic Edition or PingPlotter. These solutions display ping data graphically in real time and help detect anomalous patterns, spikes, or packet loss.

In the professional field, the following stand out, among others:

• PRTG Network Monitor: a fairly comprehensive monitoring platform for monitoring systems, devices, traffic, and applications.
• SolarWinds Network Performance Monitor: high-level solution, with network maps, performance analysis and advanced alarms.

Measuring latency from a mobile device (Android and iOS)

You can also check your ping on smartphones and tablets. Apps like Fing, He.net Network Tools, or NetX (on Android) and Network Ping Lite or iNetTools (on iOS) allow you to ping your router or any host directly and see the average ping.

For example, if you connect your phone to the router via Wi-Fi and get an average ping of 3 ms, the wireless network is working very well. If you go to another room and start seeing 30-40 ms or peaks of 100 ms, you know that coverage or interference is a problem.

PingoMeter to see the ping all the time

If you want to keep track of latency at all times in Windows, PingoMeter is a lightweight, open-source application that sits in the system tray next to the clock and displays a small color-coded graphic depending on the latency level: green (good), yellow (fair), or red (bad).

It's portable, allows you to customize the IP address it pings (Google's DNS servers are the default), the measurement interval, and alert thresholds. It's perfect for detecting at a glance when your connection starts acting up.

How to reduce latency at home

Once you know you have high ping, it's time to roll up your sleeves. There are several measures you can take on a home network or small office without needing to invest heavily.

Use an Ethernet cable whenever possible.

The number one recommendation is simple: if you want the lowest possible latency, connect your device via cable . This eliminates the problems inherent in Wi-Fi (interference, slow clients, noise from neighbors, etc.) and gives you a more stable connection.

Make sure to use Category 5e cables at a minimum (Cat 6 or higher is better) to guarantee Gigabit Ethernet without artificial bottlenecks.

Optimize and strengthen your WiFi network

When you can't use a cable, try to make the most of WiFi:

• Connect demanding devices (console, Smart TV, laptop for work) to the 5 GHz Band if you are relatively close to the router.
• Leave the 2,4 GHz band for IoT devices or very distant equipment that needs more range.
• Change channels if you detect many neighboring networks on the same channel. There are apps that scan the Wi-Fi environment to see which channels are less congested.
• Place the router in a high and central area away from the house, away from appliances and metal structures.

If your house is large or has many walls, you may need repeaters, WiFi Mesh systems or PLC with integrated WiFi to bring coverage to all rooms without latency skyrocketing.

Control downloads, updates, and background apps

When you're going to play a game, make an important video call, or share your screen, try to avoid having other devices at home performing large downloads or heavy streaming . Pause cloud backups and prevent automatic updates during those times.

On your PC, check which processes are using the network in the Task Manager and close any you don't need. On mobile devices and consoles, temporarily disable background patch downloads if you experience lag.

Update equipment and keep the system clean

Keeping your operating system, network card drivers, and router firmware up to date helps optimize resource usage and resolve stability issues. It's also vital to have updated antivirus and antimalware software and to scan your devices if you suspect anything is slow for no apparent reason.

A very old router with limited hardware and no support for QoS, modern Wi-Fi, or anti-bufferbloat can be the main culprit behind your poor experience. If you play a lot of online games or work remotely daily, it's a good idea to invest in a more powerful, dedicated router , especially one designed for gaming with advanced prioritization features.

Avoid VPNs and proxies if you're looking for the lowest ping

Unless absolutely necessary, disable your VPN and any proxies when you want to minimize latency. In many cases, you'll see a significant drop in ping as soon as you stop using that intermediary server.

Advanced router settings to lower latency

Beyond the basics, most modern routers include advanced features that, when properly configured, can make a difference, especially when multiple users are sharing the same connection.

Enable QoS and prioritize critical traffic

Quality of Service (QoS) allows you to prioritize certain devices or types of traffic over others. For example, you can specify that your game console, gaming PC, or laptop used for video calls takes precedence over downloads, backups, or streaming.

In your router's control panel, usually in a section called QoS or Bandwidth Control, you can assign high priority to games, VoIP, and video conferencing , and lower priority to less urgent traffic. This way, even if someone downloads a huge game, your latency won't spike.

Anti-bufferbloat and queue management

Some routers, especially those designed for gaming, incorporate specific mechanisms to minimize buffer bloat. Instead of letting packets accumulate until the buffer is full, they use smart queues that quickly dispatch interactive packets (game, voice, remote control) before large transfers.

If your router doesn't have an explicit anti-bufferbloat function, you can mitigate it by adjusting the upload and download limits in QoS so that the device manages queues better and doesn't saturate the link 100%.

Disable unnecessary features

Often, features are enabled by default that, while useful in certain contexts, add processing load to each package: advanced URL filtering, deep packet inspection (DPI), complex parental controls, extremely detailed logging, etc.

If your priority is to have the lowest possible latency during a specific time period—for example, during an online tournament or a critical remote work window—you can temporarily disable these options, always considering the balance with security.

Latency in video calls, teleworking and IoT

Beyond gaming, latency has a direct impact on how we work and communicate. In a context where remote work, Zoom/Teams meetings, and connected devices are the norm, controlling ping is vital.

In video calls, significant latency causes participants to talk over each other , awkward silences, or a lack of synchronization between image and sound. If there is also jitter and data packet loss, freezing and even call dropouts can occur.

In remote work, high latency complicates the smooth use of remote desktops, cloud applications, access to corporate servers, or IP telephony systems. In many cases, the user perceives the "remote office" as clunky or unusable when, in reality, the problem is excessive or highly variable ping.

In the Internet of Things, latency affects the feeling of control: turning on a light with a voice assistant, moving a security camera, or activating a pet feeder become inconvenient if several seconds pass between the command and the action . At an industrial level, this latency can be even more critical.

The role of ISPs and data centers in latency

For internet service providers and data center operators, maintaining low latency is not just a technical issue: it's part of their value proposition. An infrastructure with efficient routes, low congestion, and continuous monitoring translates into more satisfied customers and fewer incidents.

Some common strategies in this environment are:

• Use of fiber optics and dedicated links on the backbone network.
• Optimized internal network architectures (spine-and-leaf) to reduce hopping.
• Direct interconnection (peering) with other carriers, clouds and IXPs, avoiding detours.
• Implementation of CDNs and local caches to serve content from locations close to the user.
• Proactive monitoring with solutions such as PRTG, NPM and similar systems.

Furthermore, a well-designed ISMS, aligned with ISO 27001 and integrated into a PDCA (Plan-Do-Check-Act) cycle, allows latency to be identified as a risk that can affect the availability and quality of services, and to establish controls and metrics to keep it under control.

For all the above reasons, whether you're a home user, a corporate network manager, or an ISP, it's worth taking latency seriously: measuring it regularly, identifying where the problem occurs, and applying the appropriate measures—from using cable at home to redesigning the network architecture or deploying peering and SD-WAN in advanced scenarios—is what makes the difference between a connection that simply has high megabit speeds and a network that truly responds on the first try.