Identifying network traffic types is vital because it allows you to consider various facets of network quality. Though people use multiple classifications and terms to define network traffic, it’s broadly classified by direction, such as north-south or east-west traffic. Typically, network traffic represents the data or packets of data that travel through one or more computer networks at a given time. However, there are many other ways of looking at network traffic, primarily driven by their use cases and applications. For instance, some network traffic types are categorized based on whether or not they are suitable for real-time applications — and you’ll recognize that most common web applications fall under this umbrella. Real-time network traffic enables live streaming, online gaming, web hosting, and more. Alternatively, people primarily use non-real-time traffic for things like file downloads from browsers (HTTP downloads), torrents (Bittorrent), and NNTP news servers. 1 RingCentral RingEx Employees per Company Size Micro (0-49), Small (50-249), Medium (250-999), Large (1,000-4,999), Enterprise (5,000+) Medium (250-999 Employees), Large (1,000-4,999 Employees), Enterprise (5,000+ Employees) Medium, Large, Enterprise Features Hosted PBX, Managed PBX, Remote User Ability, and more 2 Talkroute Employees per Company Size Micro (0-49), Small (50-249), Medium (250-999), Large (1,000-4,999), Enterprise (5,000+) Any Company Size Any Company Size Features Call Management/Monitoring, Call Routing, Mobile Capabilities, and more 3 CloudTalk Employees per Company Size Micro (0-49), Small (50-249), Medium (250-999), Large (1,000-4,999), Enterprise (5,000+) Any Company Size Any Company Size Features 24/7 Customer Support, Call Management/Monitoring, Contact Center, and more How network traffic flows A computer network consists of a collection of machines and devices called nodes (which are computing devices like IoT, servers, modems, and printers), along with the paths that link those nodes together. The benefit of a network is to allow many computers to communicate with each other seamlessly. Network traffic is essentially the data being sent from one location to another between source and destination devices. However, this data isn’t sent all at once. Instead, the network breaks it up into smaller batches known as data packets. This step makes the transmission process more efficient and reliable, especially when large files are involved. Data packets represent units of data that constitute the network’s workload. Each packet comes with a header and a payload that contains the data meant for transfer. These packet headers act as metadata (including host and destination address information) that’s necessary to process the content. A classic example of a network is the internet — a dispersed network of public and private IT infrastructure, linked computers, and devices that facilitate global communications. Routing and path selection Efficient routing ensures data packets take the best paths through a network, balancing traffic and maintaining smooth communication. Routers rely on predefined rules and network metrics like speed, capacity, and delay to select the most effective routes. They guide data packets using their headers to determine destinations, forwarding packets through multiple devices until the receiving device reassembles them. Poor routing can increase network congestion, reduce reliability, increase latency, cause packet loss, and cause communication failures. Following best practices and computer networking fundamentals ensures that all of these bad outcomes are limited as much as possible. Beyond path selection, routers also handle data forwarding and load balancing. Data forwarding moves packets to the next device along the chosen path, while load balancing prevents network congestion by distributing traffic across multiple routes, sometimes using redundancy to send copies of packets along alternate paths. Quality of Service (QoS) QoS is a pivotal mechanism for managing and administering network quality, helping to reduce packet loss, jitter, and latency — including determining traffic transmission priority. QoS is also instrumental in prioritizing and allocating sufficient bandwidth to critical network traffic. For example, admins can use QoS to prioritize VoIP traffic on the network, ensuring that real-time communications like voice and video get the bandwidth they require. Without QoS, phone calls would compete with resource hogs like CRM software and large file downloads, leading to choppy audio and dropped calls. Five types of network traffic Once again, network types are broadly classified based on various factors, such as the direction in which their data packets flow, or the kind of traffic that passes through the network. North-south traffic Description: In practical terms, the traffic that flows between a client and a server is externally oriented, meaning it moves from an internal data center to an external client (and the rest of the network outside the data center’s perimeter). As a result, north-south refers to traffic that enters and exits a network. It points to a vertical direction flow, typically coming from an organization’s IT infrastructure to a system — or to an endpoint that physically resides outside the network. Traditionally, southbound traffic is data entering an organization’s data center, typically through a firewall or router acting as a network perimeter device. Likewise, data leaving the data center is called northbound traffic. Main purpose: North-south traffic facilitates external client-server communications that drive the core of modern digital infrastructure and communications like the internet and cloud-based applications. Main benefits: North-south traffic has grown astronomically with the advent of cloud computing systems and applications. As a result, the focus on north-south traffic has made organizations more vigilant at the ingress/egress point of data centers. This means there’s an increased urgency for validating external client requests, improving data security compliance, and protecting intellectual property. Limitations/Problems: While this network traffic is effective for data transfer, its access to data from the outside world makes it more susceptible to security threats. Therefore, north-south network traffic is inherently more risky because it flows from outside of the corporate perimeter. As a result, a network configuration like this requires close monitoring of incoming and outgoing traffic. It calls for investment in firewalls, Virtual Private networks (VPNs), and intrusion detection systems to mitigate malware, ransomware, and privacy issues. Example: Any executive at a corporate office or engineer at a data center is likely to need access to relevant documents from their organization’s cloud account to