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The networks category covers networking protocols, data transmission methods, network addressing, and network security. Understanding network fundamentals is crucial for designing, implementing, and managing reliable and secure communication systems.

Thumbnail of an article about P4 Network Programming Language — what is it all about?
SOFTWARE DEVELOPMENT
NETWORKS

P4 Network Programming Language — what is it all about?

The programming language P4 is gaining in popularity in the network industry and is considered the next step in the SDN evolution. In this blog post, I will take a closer look at P4 and try to show why it is so important. Network devices like switches or routers are most commonly designed ”bottom-up.” The switch vendors that offer products to their clients usually rely on external chips from 3rd party silicon vendors. The chip is the heart of the system and in practice determines how device OS is realized and what functionality it can offer.
Paweł Parol

Paweł Parol

on Apr 22, 2020
Thumbnail of an article about A traffic generator for measuring network performance
QUALITY ASSURANCE
NETWORKS

A traffic generator for measuring network performance

It is probably the cloud that first comes to mind when you think about the architecture of modern services. It is an obvious choice for building large, distributed systems from scratch, as well as for the many enterprises migrating their infrastructure and services to the cloud. It is all very appealing, and modern, and intelligent. But that does not mean there are not serious challenges in going cloud. How should the infrastructure in use be tested? How can network performance be measured reliably in a cloud environment?
R&D Team

R&D Team

on Mar 31, 2020
Thumbnail of an article about Kubernetes workloads — using multiple networks
NETWORKS

Kubernetes workloads — using multiple networks

Since there is no separate networking object among Kubernetes objects enabling the running of multiple networks, a workaround is required. Using a Container Network Interface (CNI) is a good place to start. Read this blog post to learn how you can use it to get multiple networks for Kubernetes workloads. I also describe my proposal for changes in source code that will enable native handling of multiple networks in Kubernetes. This blog post is based on the presentation which Doug Smith from Red Hat and I gave at the KubeCon+CloudNativeCon North America 2019 conference.
Piotr Skamruk

Piotr Skamruk

on Nov 28, 2019
Thumbnail of an article about Seamlessly transitioning to CNFs with Tungsten Fabric
NETWORKS

Seamlessly transitioning to CNFs with Tungsten Fabric

Cloud-native Network Functions (CNFs), by all appearances, seem to be the next big trend in network architecture. They are a logical step forward in the evolution of network architecture. Networks were initially based on physical hardware like routers, load balancers and firewalls. Such physical equipment was then replaced by today’s standard, VMs to create Virtualized Network Functions (VNFs). Now, a lot of research is going into moving these functions into containers. In such a scenario, a container orchestration platform would be responsible for hosting CNFs.
Jarosław Ganczarenko

Jarosław Ganczarenko

on Sep 26, 2019
Thumbnail of an article about Uncontainerizable VNFs in a CNF environment
NETWORKS

Uncontainerizable VNFs in a CNF environment

Cloud-native network functions (CNFs, for short) are a hot topic in network architecture. CNFs use containers as the base for network functions and thus would replace today’s most widely used standard, Virtual Network Functions (VNFs). In such a scenario, a container orchestration platform--Kubernetes, say--could be responsible not only for orchestrating the containers, but also for directing network traffic to proper pods. While this remains an area under research, it has aroused considerable interest among industry leaders.
Piotr Skamruk

Piotr Skamruk

on Sep 14, 2019
Thumbnail of an article about How can DPDK access devices from user space?
SOFTWARE DEVELOPMENT
NETWORKS

How can DPDK access devices from user space?

DPDK (Data Plane Development Kit) is a set of libraries for implementing user space drivers for NICs (Network Interface Controllers). It provides a set of abstractions which allows a sophisticated packet processing pipeline to be programmed. But how does DPDK work? How is it able to access the hardware directly? How does it communicate with the hardware? Why does it require a UIO module (Userspace input-output)? What are hugepages and why are they so crucial? In this blog post I will try to explain, with a reasonable amount of detail, how a standard kernel space NIC driver works, how a user space program can access hardware and what can be gained from having it do so.
Dariusz Sosnowski

Dariusz Sosnowski

on Aug 22, 2019
Thumbnail of an article about Infographic: The NFV MANO model in practice
NETWORKS

Infographic: The NFV MANO model in practice

Please bear in mind that this infographic does not pretend to present a complete and ultimate mapping. It is only our vision based on the specific products. Since it is tough to precisely map the existing solutions, the model itself should be treated as an approximation. The elements presented are only examples and obviously do not show every solution available on the market. We are always eager to discuss this subject and consider different points of view.
Monika Antoniak

Monika Antoniak

on Jul 24, 2019
Thumbnail of an article about Infographic: BUM traffic in the L2 and L3 domains
NETWORKS

Infographic: BUM traffic in the L2 and L3 domains

Broadcast, unknown-unicast and multicast traffic (BUM) in the L2 and L3 domains
Monika Antoniak

Monika Antoniak

on Jul 18, 2019
Thumbnail of an article about Infographic: ISO/OSI and TCP/IP models
NETWORKS

Infographic: ISO/OSI and TCP/IP models

ISO/OSI and TCP/IP models - what are the equivalences between the layers?
Monika Antoniak

Monika Antoniak

on Jul 11, 2019
Thumbnail of an article about Infographic: IPv4 vs IPv6 — comparison
NETWORKS

Infographic: IPv4 vs IPv6 — comparison

Monika Antoniak

Monika Antoniak

on Jul 3, 2019
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