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OBSERVABILITY
NETWORKS

In-band network telemetry — what is it all about?

In-band network telemetry is one concept from a wide range of available solutions for network telemetry. If you want to know what this approach is all about and how it has been adopted so far, please read on. Over the years, a wide variety of protocols, methods, and tools have been developed for network telemetry. These solutions are quite diverse and are used depending on the specific context and needs. Some time ago, one more concept appeared on the map: in-band network telemetry. The approach here is to gather so-called telemetry metadata for packets traversing network segments.
Multiple authors

Multiple authors

on Jan 30, 2023
Thumbnail of an article about Linux as a network device
NETWORKS

Linux as a network device

Using Linux as a network device can result in many benefits. Find out what network devices are and why it’s a good idea to use Linux as one. This is actually not an easy question to answer. In general, one can say that a network device is a piece of equipment whose main role is to forward packets or perform actions on them. While packet forwarding seems easy to understand, the actions that a packet can be a subject to differ between device types. For example, a router will (usually) route an IP packet based on a (OSI model) layer 3 header, a switch will use layer 2 for that, and a firewall can dig deeper into the packet payload.
Multiple authors

Multiple authors

on Jan 23, 2023
Thumbnail of an article about What is Policy Based Routing (PBR)?
NETWORKS

What is Policy Based Routing (PBR)?

Nowadays, network traffic nature becomes very complicated in terms of the mixture of applications and their connectivity requirements. Achieving these requirements by means of traditional routing mechanisms may become cumbersome or even impossible and requires special dedicated solutions. Additionally, organizations need to focus on operational costs more strictly than in the past. One good direction to achieve this goal is the optimization of resource usage within different domains. Networking is one such domain, where the objective is to rationally maximize the usage of existing infrastructure rather than making an investment in increasing its capacity.
Łukasz Drzewiecki

Łukasz Drzewiecki

on Jan 16, 2023
Thumbnail of an article about VLAN vs. VXLAN — what’s the difference and is one better than the other?
NETWORKS

VLAN vs. VXLAN — what’s the difference and is one better than the other?

VM, VDI, VIM, NFVI, VLAN, VXLAN, VNF - the famous ‘V’ that dominates today’s IT world stands, of course, for ‘Virtual’. Every day we use virtualized servers, storage, desktop or networks without even realizing it. The convenience, cost-saving, enhanced features and security are just some of the reasons why we start using virtualization and often never look back. The same is true for computer networking, where a single physical network can host multiple separated, logical (virtual) networks that may have different topologies and feature sets or even carry traffic of different customers without interfering with each other.
Jerzy Kaczmarski

Jerzy Kaczmarski

on Jan 13, 2023
Thumbnail of an article about Sentiment Analysis. What is it and how to use it?
DATA

Sentiment Analysis. What is it and how to use it?

During face-to-face conversations or by reading text - we, people, can determine a speaker's intention or mood, whether they feel happy about something or not. We can also identify the polarity of the context - is the expression positive or negative or maybe even neutral? It is relatively easy for most people, but do computers understand emotions? Is it important for machines to understand humans’ intentions? With the technological progression and advancement of machine learning techniques - our machines are getting closer and closer to answering these questions.
Katarzyna Hewelt

Katarzyna Hewelt

on Jan 10, 2023
Thumbnail of an article about HTTP/3 Protocol — Performance and Security Implications
NETWORKS

HTTP/3 Protocol — Performance and Security Implications

Web browsers use various protocols to deliver to users what they need. The best-known internet protocol is called HTTP. And just like any other technology, it is not immune to change. Read the article to learn about the HTTP protocol's history and compare its newest versions. The Hypertext Transfer Protocol (HTTP) is the foundation of the World Wide Web and is used to load web pages using hypertext links. HTTP is an application-layer protocol designed to transfer information between devices and runs on top of other layers of the network protocol stack.
Dominik Sieciński

Dominik Sieciński

on Jan 9, 2023
Thumbnail of an article about AI and Machine Learning landscape for networks [infographic]
NETWORKS
DATA

AI and Machine Learning landscape for networks [infographic]

Aritifical intelligence (AI) and machine learning (ML) is a trending topic in all technological domains. It offers a rich set of methods for data processing that can be used to solve practical problems, including those occurring in networks. In this article we present a set of network issues for which the use of ML methods and different AI types can bring benefits and generally seems to make sense. Please note that this is a non-exhaustive list and is open to additions. For greater clarity, five main categories have been used.
Multiple authors

Multiple authors

on Jan 5, 2023
Thumbnail of an article about Clean architecture — everything you need to know
SOFTWARE DEVELOPMENT

Clean architecture — everything you need to know

Many developers are aware of the clean code principles but there is a further way to level up, clean architecture. Not many are aware of the concept of clean architecture, although it is definitely worth exploring. My own experience proves that implementing clean architecture principles in your project can solve a number of issues. In this article I decided to take a closer look at what clean architecture means and why it can be important. Probably every developer and project manager has met this situation at least once in a career: a project shows rapid growth in the beginning then slows down or even becomes completely stuck.
Alex Bykow

Alex Bykow

on Jan 4, 2023
Thumbnail of an article about React confetti — let’s celebrate with JavaScript libraries!
SOFTWARE DEVELOPMENT

React confetti — let’s celebrate with JavaScript libraries!

Anniversaries, big and small achievements, public or religious holidays. We are looking for opportunities to celebrate them in our lives, as it gives us joy and happiness. It can be useful and fun to include this experience even in an otherwise ‘Very Serious And Important Application’. This article will focus on the confetti effect – how can you create it, what solutions can be helpful, and if it is a real thing to celebrate. In the text, you will also find code examples to make this journey more enjoyable!
Sławomir Skrzeczyński

Sławomir Skrzeczyński

on Jan 2, 2023
Thumbnail of an article about SONiC adaptation for custom functionality — the PoC reveal
NETWORKS

SONiC adaptation for custom functionality — the PoC reveal

In the previous part, we introduced both the higher and the lower level concepts necessary for understanding the use case scenario as well as a proposed solution, starting from its prerequisites through to the design and finally the implementation. In this concluding article of the series, we want to eventually answer the initially-posed question: can we adapt a SONiC switch to be able to deliver a custom functionality? In our case, a load balancing feature for GTP-U. In order to conduct this PoC we needed to:
Multiple authors

Multiple authors

on Dec 28, 2022
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