Kentik

JANUARY 10, 2022

To be more specific: slowness can be introduced as your digital connection traverses your PC, the local wifi/wired connection, the local ISP, the Tier 1 or Tier 2 provider, or the CDN that provides the hardware which hosts the web server running the application. As a result, this event introduces additional slowness.

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IP Address DNS TCP Application 98

Kentik

JULY 8, 2019

Border Gateway Protocol (more commonly known as BGP ) is the routing protocol that makes the internet work. It is the language spoken by routers to determine how packets can be sent from one router to another to reach their final destination. The entire RPKI process stands outside of the BGP routing protocol itself.

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Routers Protocol Internet Advertising 58

Kentik

OCTOBER 12, 2021

Once you saw a person’s password to any given application, you knew they were generally using the same one for all of their other applications — email, the ticketing system, the FTP and Novell servers, etc. These protocols helped the NPM identify applications. Well, that didn’t last long. Then TLS, HTTPS, SNMPv3 and it continues.

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Encryption DNS IP Address Protocol 84

Kentik

FEBRUARY 8, 2023

Port mirroring Another method for gathering traffic telemetry is port mirroring, which replicates (mirrors) the network traffic on a switch or router to a monitoring device. Software probes Software probes are programs that can be installed on servers or network devices to collect data on network traffic.

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Network Networking Port IP Address 111

CATO Networks

JANUARY 17, 2018

In the light of recent ransomware attack campaigns against Microsoft RDP servers, Cato Research assessed the risk network scanning poses to organizations. The University of Pennsylvania, for example, uses network scanning in the study of global trends in protocol security. What is Network Scanning?

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Network Networking Server Port 52

CATO Networks

OCTOBER 30, 2019

Network packets, the protocol data units (PDUs) of the network layer, are often taken for granted by network pros. Routers forward these packets from source to destination and data encapsulation enables the data to traverse the TCP/IP stack. Common causes of packet loss include: Routers with heavy CPU load. tracert/traceroute.

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WAN Routers TCP Protocol 52

Kentik

JANUARY 13, 2021

Send these pings using the Internet Control Message Protocol (ICMP) or TCP to one or any of the devices you believe to be involved. Ping is a utility that’s available on practically every system, be it a desktop, server, router, or switch. Get the Path with Traceroute. That’s also true for flow data, which summarized packets.

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Network Networking TCP Protocol 114

Kentik

JULY 20, 2018

NetFlow is a protocol that was originally developed by Cisco to help network operators gain a better understanding of their network traffic conditions. NetFlow collector and analysis applications represent two key capabilities of NetFlow network monitoring products that are typically implemented on the same server. Huawei routers.

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Routers IP Address Protocol Server 40

Engineering at Meta

NOVEMBER 21, 2022

Meta is deploying a timing protocol, Precision Time Protocol (PTP) , that will offer new levels of accuracy and precision to our networks and data centers. Meta is deploying a network timing protocol, Precision Time Protocol (PTP) , to improve the accuracy and precision across our networks as well as in many use cases.

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Data Centers Server Network Networking 53

Kentik

JANUARY 19, 2018

And a Google Cast protocol bug caused temporary Wi-Fi outages. According to SDxCentral, the football team’s IT team “deployed Nutanix Enterprise Cloud software for its mission-critical applications, including Microsoft SQL Server databases, financial reporting software, and an internally-developed player scouting application.”.

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Network Networking Routers Artificial Intelligence 40

Kentik

MARCH 7, 2016

But while these protocols have been around for a couple of decades, their potential utility to network operators was initially unrealized, and the process of exposing more value has been a long, gradual evolution. By 1994 BGP4 had become the settled protocol for inter-AS routing. In the beginning…. Kick AS and take names.

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Protocol Server Internet Engineering 40

CATO Networks

APRIL 20, 2016

Originally, the concept of SDN emerged as a way to unbundle a hardware networking device (like a router) into a software-based control plane and a hardware-based data plane. Apparently, standard servers with optimized, yet standard, Intel hardware and DPDK-enabled software stack can handle multi-gigabit network workloads.

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Network Security Network Networking Cloud 52

Kentik

APRIL 24, 2017

Comparing flow protocols for real-world large-scale networks. A lot of ink has been spilled over the years on the topic of flow protocols, specifically how they work and their relative accuracy. One of the things that can be rather confusing is that there are a lot of different flow protocol names.

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Protocol Routers Bandwidth Internet 40

Kentik

APRIL 3, 2023

Higher level abstractions For another level of abstraction, open source tools have emerged, such as Cilium , which runs as an agent in container pods or on servers. Second, in a busy network, devices such as routers, switches, and firewalls may be very busy operating at a relatively high CPU.

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TCP Application Virtual machine Network 110

Kentik

APRIL 4, 2023

Be it power supplies, servers, routers, load balancers, proxies, or any other physical and virtual network components, the horizontal scaling that redundancy provides is the ultimate safety net in the presence of failure or atypical traffic demands.

Cloud 104

Cloud Network Networking Bandwidth 104

Kentik

OCTOBER 20, 2021

We can’t telnet to the routers in the path because different companies in different countries own them. Although synthetics is considered a more recent advance in network monitoring, its root goes back several decades to protocols such as PING and traceroute. Distributed network performance testing. NPM wrap-up.

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Encryption Routers DevOps Application 52

Kentik

FEBRUARY 13, 2017

The problem is that since CDN servers are hosted in many ISP domains, under the ASNs of those ISPs, it’s not possible to identify CDN traffic strictly from source ASN. For Web enterprises operating large-scale Internet edges, the cost of a single, name-brand edge router can be $1M or more. CDN Traffic Density-O-Meter.

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Routers DNS Protocol Engineering 40

Confluent

JUNE 26, 2019

So you wouldn’t apply DDD to, say, infrastructure software or building routers, proxies, or caching layers, but instead to business software that solves real-world business problems. From a technology perspective, this could include different APIs, frameworks, communication protocols, and datastores. So why is Kafka such a good fit?

Application 109

Application Protocol PaaS Blockchain 109

Kentik

AUGUST 28, 2019

Steaming telemetry uses a push-based mechanism with which data can be transmitted automatically and continuously from various remote sources (such as routers, switches, firewalls, etc.) Encoding options: Choices of JSON, XML, and Google Protocol Buffers (GPB). gNMI is a gRPC-based protocol for state management on network elements.

Network 16

Network Networking Protocol TCP 16

Kentik

DECEMBER 2, 2015

The issue was a new type of “spam reflection” that was causing headaches by allowing spammers to avoid detection while utilizing servers inside the customer’s network as spam sources. Here’s how these types of schemes work: The spammer sends a SYN from a spoofed source IP address to TCP port 25 (SMTP) on the target mail server.

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TCP Protocol Port IP Address 40

Kentik

SEPTEMBER 20, 2016

For example, using SNMP or flow data to track traffic volume on interfaces, servers, and devices can provide necessary visibility into possible congestion points. As an example, we’ll use traffic from Kentik’s own servers. TCP was designed as a stateful protocol to provide reliability across network infrastructure.

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Network Networking TCP Server 40

Kentik

APRIL 16, 2023

Having an expert perspective on network protocols helps ensure data will be moved securely and with network performance in mind. DevOps and NetOps need to work together Collaboration is often a two-way street. While DevOps may indeed be “blind to the network,” achieving visibility will involve a lot of work and contribution from NetOps.

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Application DevOps Network Networking 64

Kentik

JUNE 13, 2023

routers, switches, servers, interfaces, and links). Streaming telemetry is one of five methods for collecting performance data from a device in a network (e.g.,

Routers 52

Routers Network Networking Protocol 52

Kentik

JULY 25, 2016

In part 1 of this series, we established that BGP is the protocol used to route traffic across the interconnected Autonomous Systems (AS) that make up the Internet. So filling your router with 500,000+ BGP routes isn’t going to do you any good, since all of those routes point to the same place (your one upstream provider).

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Advertising Internet Routers Protocol 40

CATO Networks

JUNE 1, 2020

The challenge in the underlying causes of packet loss can be anything from overworked routers to network congestion to software bugs. Proxy TCP Connections Fundamentally, TCP (Transmission Control Protocol) connections inherently add more overhead than their UDP (User Datagram Protocol) counterparts.

Network 52

Network Networking TCP MPLS 52

Kentik

AUGUST 28, 2019

Steaming telemetry uses a push-based mechanism with which data can be transmitted automatically and continuously from various remote network devices (such as routers, switches, firewalls, etc.) Encoding options: Choices of JSON, XML, and Google Protocol Buffers (GPB). The gNMI Protocol. Session Initiation options: Dial-out (i.e.,

Network 52

Network Networking Protocol TCP 52

Kentik

AUGUST 14, 2017

We know that flows are a set of packets that share common attributes including protocol, source and destination IP, and src, dst, and next-hop AS. are generated by individual routers, switches, and hosts rather than system wide. This could be a backbone interface, or an interface towards a server inside the network.

IP Address 40

IP Address Routers Network Networking 40

Kentik

MARCH 6, 2017

One key point, as revealed in Akamai’s Q3 2016 State of the Internet Security Report, is that the vast majority of DDoS attacks — over 98% — are focused on disrupting access to network or server infrastructure rather than on targeting application limitations or vulnerabilities.

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IoT DNS IP Address Server 40

Software Architecture Zen

JUNE 6, 2022

You need to trust the cryptography, the protocols, the software, the computers and the network . Someone still has to build the servers and the chips that go in them, the routers, firewalls and networks that allow the servers to talk to each other and write and operate the software that glues all this hardware together.

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Blockchain Financial Banking Education 52

Kentik

JULY 28, 2021

Latency : Missing packets in connection-oriented protocols such as TCP and QUIC result in lost packets getting resent. Bad hardware (the switch or router port). Overwhelmed router. Congestion in the form of high-connection utilization or an overworked router in the path is another common source of trouble. UDP vs. TCP.

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Cloud TCP Routers Protocol 116

Kentik

JUNE 5, 2023

In this incident, a software bug caused a router to announce a large part of the IP address ranges present in the global routing table as if they were originated by AS7007. Two competing methodologies, RPSL and RPKI, are used to inform the defensive configuration of routers.

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IP Address DNS Internet Routers 145