Dave Greenfield

Contributor

Opinions expressed by ICN authors are their own.

Dave Greenfield is the secure networking evangelist in the office of the CTO of Cato Networks. He brings more than 20 years of experience in IT and telecoms having worked as an award-winning journalist, blogger, and a technology analyst advising companies on their IT and WAN strategies.

Dave has a background in philosophy and computer science and is the author of the “Ultimate WAN RFP” and the “Essential Guide to Optical Networks.”

The opinions expressed in this blog are those of Dave Greenfield and do not necessarily represent those of IDG Communications, Inc., its parent, subsidiary or affiliated companies.

What Larry, Moe and Curly can teach us about network security and SD-WAN agility

The delivery challenges every SD-WAN project must consider

The delivery challenges every SD-WAN project must consider

To replace MPLS, SD-WAN projects must also replace the packaging around MPLS services.

Will networks and security converge in 2017?

Will networks and security converge in 2017?

We went rummaging through our fortune cookies and came up with this Yoda-like network and security prediction for 2017: security shall networking become.

Should you buy an SD-WAN service?

Should you buy an SD-WAN service?

More than 30 vendors offer an SD-WAN option. To decide which is best for you, start by looking at the three types of SD-WAN offerings.

Supplier management: The biggest threat to SD-WANs—and what you can do about it

Supplier management: The biggest threat to SD-WANs—and what you can do about it

With SD-WANs comes the headache of managing and coordinating with many new internet providers. Virtual Network Operators (VNOs) may have just the answer.

Gartner predicts: SD-WANs to replace routers, but which SD-WAN is the question

Gartner predicts: SD-WANs to replace routers, but which SD-WAN is the question

Gartner WAN expert says enterprises had better check SD-WAN vendors' balance sheets twice before selecting provider.

Performance analysis: Bursting the myth of MPLS performance

Performance analysis: Bursting the myth of MPLS performance

Private MPLS services are supposed to outperform SD-WANs, but as one enterprise recently learned, the internet can outperform even private MPLS services.

Virtualized network services will be game changer for enterprise IT

An old colleague of mine, Current Analysis’ Brian Washburn, hit it right last week when he blogged about how virtualized services will be a game changer for managed network service providers. The same is true for enterprise IT...

Self Service: The most understated reason why SDNs will rock your world

As I noted previously, two surveys give different pictures about SDNs. My take: every enterprise will adopt SDNs, but lower hardware prices will not be the biggest reason. Here’s why:To hear proponents tell it, Software Defined...

SDNs: Love 'em or Leave 'em?

Are Software Defined Networks (SDN) on your short list yet? Two recent surveys suggest it depends on where you work. I say that given our recent experiences with SDN, within five years and everyone will adopt or have definitive plans...

VMware's Nicira acquisition represents new threats and new opportunities for network managers

Perhaps you’re like a lot of us in IT. You’ve come up through the ranks, mastered subnetting and routing, understood the interaction between loss, latency and bandwidth, and learned the intricacies of Spanning Tree. And perhaps...

Beyond Dropbox: Security is only part of the cloud's problem

Microsoft might want you to “Take it to the Cloud” but a whole lot of people are wishing they had stayed on the ground. The recent news that Dropbox accounts may be exposed, again, to attack should raise alarms for any IT manager...

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