Why latency is important when choosing an IP backbone provider

As businesses rely on cloud computing, AI, real-time communications and globally distributed applications, network latency has become a defining factor in overall network performance.

While bandwidth determines how much data can be transferred, latency determines how quickly that data reaches its destination. Even a high-bandwidth connection can deliver poor application performance if latency is too high or inconsistent.

For organisations running mission-critical applications, selecting an IP backbone provider with a resilient global network, low latency and robust Service Level Agreements (SLAs) can significantly improve user experience, application performance and business resilience.

What is network latency?

Network latency is the time it takes for data to travel from its source to its destination across a network. It is typically measured in milliseconds (ms) and is often calculated as the round-trip time (RTT) – the time it takes for data to travel to its destination and back again.

Latency is influenced by several factors, including:

• The physical distance data travels.

• The number of routers or network hops along the path.

• Network congestion.

• Processing time within networking equipment.

• Queuing delays when infrastructure becomes overloaded.

Although latency is often confused with bandwidth, they measure different things. Bandwidth is the amount of data that can be transferred, whereas latency measures how quickly that transfer begins. A network with high bandwidth but poor latency can still feel slow to users.

Why is low network latency important?

Low network latency is essential because modern digital services depend on fast, predictable communication between users, applications and cloud platforms.

High latency can negatively affect:

• Cloud application performance.

• AI inference and machine learning workloads.

• Voice and video conferencing.

• Financial trading platforms.

• Industrial automation and IoT.

• Customer-facing digital experiences.

For example, AI applications require rapid responses during inference, while collaboration platforms rely on low latency to maintain natural conversations. In financial services, even a few milliseconds can influence transaction execution, while manufacturers depend on low latency for real-time monitoring and automated control systems.

As organisations continue migrating workloads across multiple cloud environments, choosing a low-latency network becomes increasingly important for maintaining productivity and delivering a consistent customer experience.

What is network jitter and why does it matter?

While average latency is important, consistency is equally critical.

Network jitter refers to variations in latency between individual packets as they travel across a network. If packets arrive at inconsistent intervals, applications that depend on real-time communication begin to suffer.

High jitter can result in:

• Choppy VoIP calls.

• Frozen video meetings.

• Delayed cloud applications.

• Interrupted media streams.

• Poor AI response consistency.

A well-designed enterprise network reduces jitter by using efficient routing, avoiding congestion and maintaining consistent quality of service across the backbone.

How packet loss impacts network performance

Another important measure of network performance is packet loss.

Network packets are small units of data transmitted across a network. When packets using the Transmission Control Protocol (TCP) are delayed or dropped, they must be resent, increasing latency and reducing overall performance.

Packet loss is commonly caused by:

• Network congestion.

• Outdated or overloaded networking hardware.

• Software faults.

• Wireless interference.

• Security incidents such as distributed denial-of-service (DDoS) attacks.

Low packet loss is especially important for organisations running real-time applications where every packet contributes to a smooth user experience.

Why SLAs are essential when choosing an IP backbone provider

Not every connectivity provider offers predictable network performance.
Many internet services operate on a best-effort basis, meaning there are few guarantees around latency, packet delivery or uptime.

An enterprise-grade IP backbone provider should offer comprehensive Service Level Agreements (SLAs) covering metrics such as:

• Network availability.

• Round-trip latency.

• Jitter.

• Packet delivery.

• Mean time to restore service.
  

These commitments provide confidence that business-critical applications will continue to perform reliably, even during periods of heavy demand.

How a Tier 1 IP backbone reduces latency

The underlying network infrastructure plays a major role in determining latency.

A Tier 1 IP backbone such as PCCW Global’s (AS3491) network delivers lower latency by combining direct fibre routes, extensive global reach, fewer intermediary networks and intelligent traffic routing. With fewer network hops and greater control over traffic flows, latency and jitter are improved, meaning data reaches its destination more quickly and consistently.

Unlike providers that depend heavily on third-party networks, operators that own and manage their backbone can optimise routing, rapidly resolve issues and deliver predictable performance across international connections.

For organisations running AI, cloud, media or mission-critical enterprise applications, this translates into reliable global connectivity backed by enterprise-grade SLAs and a better experience for users worldwide.

Therefore, when evaluating an IP backbone provider, don’t focus solely on bandwidth. Consider how the provider performs across latency, jitter, packet loss, resilience and SLAs, as these are the metrics that directly affect application performance and user experience. Get in touch to learn more.