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Tuesday, August 9, 2022

Disadvantages of Network Convergence

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Should Networks Converge

Disadvantages of Network Convergence – Network convergence – bringing system and device communication to a single network – simplifies and reduces cabling complexity and overall infrastructure costs, and makes it easier to connect devices directly to the network for data collection and sharing.

But many IT professionals are asking: Does it make sense to put everything on the same enterprise network? Doing so requires you to connect mission-critical systems to an already mission-critical network. It’s like putting all your eggs in one basket, which can be risky.

The concept of convergence also puts IT directors in charge of things they’ve never had to deal with or manage before. You’re no longer talking just about computers and their data, but everything that could potentially connect to the network.

Critical building systems in a converged network environment will depend on IT having equal interest in the needs of these systems and traditional data solutions.

Many times, when this idea arises in an organization, the reaction from IT is: “You want to do what? Really?!” In other words: When you tell IT directors or network administrators that you’d like to add hundreds of devices to a network to run lights, AV, and cameras – it can be exciting and concerning.

While some say that siloed networks are complex, not scalable, and not cost-optimized, others say that disparate systems are easier to manage. In theory, it becomes clear as to who’s responsible for which systems; the separate networks are installed outside of the IT equipment closet (if it’s not on IT’s network, it’s not IT’s to manage … right?).

Security can also be less of an issue since a potential breach or problem will only impact one system as opposed to every system on the network. Keeping everything isolated and separate means, you lessen the risk of interfering with sensitive data.

Separate systems also increase overall workload and costs. For starters, it creates duplicate, redundant cable running through a building, each cable has a single purpose. When a system is installed, a new cabling infrastructure is installed along with it.

How are these separate networks managed and secured? How do upgrades occur? Data also remains isolated, so it can’t be shared with other systems for benchmarking and decision-making.

For example: If your camera system can’t interact with your access control system, it won’t “know” when forced-entry access is attempted – so the closest camera won’t automatically focus on that entry to capture footage of what’s happening. What happens when you don’t have a managed services agreement in place? Who manages performance integrity or those endpoints?

From what we hear from NSCA members (systems integrators) and their end-user customers, most networks are still separate. Why? Because IT departments don’t have adequate bandwidth and don’t want to continue to make ongoing IT investments like buying new switches.

There is technology called a demilitarized zone (DMZ) that allows separate networks to exist while also protecting them from untrusted networks. It essentially acts as an interface that sits between your network and the Internet, providing isolation between them that’s enforced by connectivity rules within the firewall.

On the other hand, we’re also seeing a trend in modern buildings – a movement toward a single network where all systems ultimately connect for data collection, remote monitoring, and management.

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Questions to Ask About Convergence

At what point does your access control system start operating on the same network as your computers? What about your distributed audio system? As with many things these days, the answer comes to less about the actual technology and more about business strategy. If convergence is potentially in your future, ask yourself these questions first:

  • What type of building are you dealing with? A corporate office could have different security or access considerations compared to a hospital or K-12 school.
  • When you plug something into the network, think about what it could represent as a vulnerability. What cybersecurity protections do you have in place, and what types are you willing to invest in to protect your converged network and its connected components? Do your devices have the protection needed to connect to the network?
  • Which systems would you “converge” specifically? All? Some? In what order?
  • Can you add network capacity as needed (quickly) to handle changes in devices and user requirements?
  • Would you take advantage of the benefits that convergence offers: data collection and gathering, the ability for remote management, etc.?
  • At what point will your network need to take all of these separate systems on? What would be your breaking point, per se?

Is it smart to keep everything isolated, or should you start stacking your network with every application you can think of to reduce costs and save on cable and wire? There are no right or wrong answers.

If you choose the latter option, your cabling infrastructure must be able to manage multiple systems at once that all require more bandwidth and less latency. Which is enough to stop some IT departments from moving forward – at least for right now.

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