Tim Greene

Executive Editor

Tim Greene is executive editor of Network World.

Weekly internet health check, US and worldwide

World's first exascale supercomputer is the world's fastest

World's first exascale supercomputer is the world's fastest

Frontier, the supercomputer at Oak Ridge National Laboratory, blows away the competition with a performance of 1.12 exaFLOPS.

Facebook outage was a series of unfortunate events

Facebook outage was a series of unfortunate events

A badly written command, a buggy audit tool, a DNS system that hobbled efforts to restore the network, and tight data-center security all contributed to Facebook’s seven-hour Dumpster fire.

Fugaku still reigns as the world’s fastest supercomputer

Fugaku still reigns as the world’s fastest supercomputer

The June 2021 TOP500 list of the fastest supercomputers has Fugaku ranked at number one, attaining the top slot for the third time and still three times faster than any other.

Center for Internet Security: 18 security controls you need

Center for Internet Security: 18 security controls you need

The goal of CIS Controls V8 is to provide practical and specific actions that can spark creation of a better network security environment.

World's fastest supercomputers: Fugaku is still No. 1 at 3X the speed of No. 2

World's fastest supercomputers: Fugaku is still No. 1 at 3X the speed of No. 2

The TOP500 list tracking the fastest supercomputers has two brand new machines that broke into the list by knocking out two of the former top 10.

How networking pros can help make better IT buying decisions

How networking pros can help make better IT buying decisions

Knowing how smart buying teams make good choices adds to the value IT pros bring to the task of purchasing new hardware, software, and services.

The 10 fastest supercomputers are led by one 2.8x faster than the rest

The 10 fastest supercomputers are led by one 2.8x faster than the rest

The TOP500 list of the world’s fastest supercomputers for June 2020 is led by an ARM-powered machine that performs 415.5PFLOP/sec and that can be tuned to handle AI apps at 1 exaFLOP/sec.

Sales of Ethernet switches and routers hit a 7-year low in Q1

Sales of Ethernet switches and routers hit a 7-year low in Q1

COVID-19-related supply-chain issues, uncertainty undercut revenues from switches and routers.

What is the internet backbone and how it works

What is the internet backbone and how it works

Tier 1 internet service providers (ISP) mesh their high-speed fiber-optic networks together to create the internet backbone, which moves traffic efficiently among geographic regions.

How to use the Linux uniq command

The uniq command in Linux is valuable for finding out who’s logged into a server

10 of the world's fastest supercomputers

10 of the world's fastest supercomputers

The fastest supercomputers in the world as ranked by TOP500 have reached a new milestone: all of the 500 systems on the list deliver at least 1 petaflop. These systems power scientific research at institutions around the world.

IBM closes $34B Red Hat deal, vaults into multi-cloud

IBM closes $34B Red Hat deal, vaults into multi-cloud

IBM has completed its acquisition of Linux giant Red Hat in a move the companies say will allow them to tackle larger projects for customers and create more partnerships with other vendors.

Qualcomm loses case about its mobile-chip licensing fees

As 5G technology gears up, a federal court has ruled that Qualcomm’s ‘onerous’ fees for its mobile chips violate antitrust law.

Study: Most enterprise IoT transactions are unencrypted

Study: Most enterprise IoT transactions are unencrypted

A Zscaler report finds 91.5% of IoT communications within enterprises are in plaintext and so susceptible to interference.

HPE to buy Cray, offer HPC as a service

HPE to buy Cray, offer HPC as a service

High-performance computing offerings from HPE plus Cray could enable things like AI, ML, high-speed financial trading, creation digital twins for entire enterprise networks.

Must-know Linux Commands

Must-know Linux Commands

A compilation of essential commands for searching, monitoring and securing Linux systems - plus the Linux Command Line Cheat Sheet.

Russia demands access to VPN providers’ servers

Russia demands access to VPN providers’ servers

10 VPN service providers have been ordered to link their servers in Russia to the state censorship agency by April 26

DoE plans world's fastest supercomputer

DoE plans world's fastest supercomputer

Aurora, the planned Department of Energy supercomputer, will be three powers of 10 faster than the current fastest supercomputer when it is delivered to Argonne National Laboratory in 2021.

Types of firewalls: What they do and what they're used for

Types of firewalls: What they do and what they're used for

Network firewalls were created as the primary perimeter defense for most organizations, but since its creation the technology has spawned many iterations: proxy, stateful, Web app, next-generation that are explained here.

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