In the International System of Units it is expressed in joules "Joule (unit)") per cubic meter (J/m).[2]​.

Among the most resilient known materials is spider silk (4500 kJ/m), tendon (2800) or mammalian horn (1800). Steel in cables has a high resilience (900 kJ/m). Wood has different resilience depending on the sign of the stress and its orientation with respect to the direction of the fibers, and its toughness values ​​can be much higher in some cases.

Taking into account the physical concepts of Resilience, in the case of computer networks and systems, it must be approached in a similar way, taking into account that today all Telecommunications infrastructure must keep in mind the high probability of suffering attacks or incidents due to failures from which it must recover as soon as possible and in the best conditions. A concept that describes this line of thought very well is: “Resilience is not the ability to recover, but the certainty in recovering.”

An infrastructure of networks and IT systems cannot be classified as resilient or non-resilient. In engineering, the absolute term ends in mathematical calculations and theories. When we bring the project to reality, it is preferable to deal with “tolerance” values ​​or compliance percentages.

It is not intended to say that we stop seeking perfection in each and every one of the things we do, what we must have is the ability to find the limits or thresholds of everything we do. The more precise you are in defining these limits, the greater your executive capacity will be. This translates into the cost/benefit ratio of these decisions, and that optimal balance saves a lot of money, time, efforts and headaches. It is vital to carry out the risk analysis methodically and yes, in particular, we take internationally proven methodologies as a reference, because better than better, then it is on the critical assets that are identified that we must advance methodically until achieving a "Life Cycle" of Security.[3]​.

There are a series of reflections, which are duly developed in the quote in this paragraph, that are the basis of a resilient network or system:

• - Wikimedia Commons hosts a multimedia gallery on testing by the Izod method or the Charpy pendulum.

In the International System of Units it is expressed in joules "Joule (unit)") per cubic meter (J/m).[2]​.

Among the most resilient known materials is spider silk (4500 kJ/m), tendon (2800) or mammalian horn (1800). Steel in cables has a high resilience (900 kJ/m). Wood has different resilience depending on the sign of the stress and its orientation with respect to the direction of the fibers, and its toughness values ​​can be much higher in some cases.

Taking into account the physical concepts of Resilience, in the case of computer networks and systems, it must be approached in a similar way, taking into account that today all Telecommunications infrastructure must keep in mind the high probability of suffering attacks or incidents due to failures from which it must recover as soon as possible and in the best conditions. A concept that describes this line of thought very well is: “Resilience is not the ability to recover, but the certainty in recovering.”

An infrastructure of networks and IT systems cannot be classified as resilient or non-resilient. In engineering, the absolute term ends in mathematical calculations and theories. When we bring the project to reality, it is preferable to deal with “tolerance” values ​​or compliance percentages.

It is not intended to say that we stop seeking perfection in each and every one of the things we do, what we must have is the ability to find the limits or thresholds of everything we do. The more precise you are in defining these limits, the greater your executive capacity will be. This translates into the cost/benefit ratio of these decisions, and that optimal balance saves a lot of money, time, efforts and headaches. It is vital to carry out the risk analysis methodically and yes, in particular, we take internationally proven methodologies as a reference, because better than better, then it is on the critical assets that are identified that we must advance methodically until achieving a "Life Cycle" of Security.[3]​.

There are a series of reflections, which are duly developed in the quote in this paragraph, that are the basis of a resilient network or system:

• - Wikimedia Commons hosts a multimedia gallery on testing by the Izod method or the Charpy pendulum.