THOUGHT FOR THE DAY

Honest

“Being entirely honest with oneself is a good exercise.” - Sigmund Frued

TOPIC OF THE DAY

OSI model

The Open Systems Interconnection model (OSI model) is a product of the Open Systems Interconnection effort at the International Organization for Standardization. It is a way of sub-dividing a communications system into smaller parts called layers. A layer is a collection of similar functions that provide services to the layer above it and receives services from the layer below it. On each layer, an instance provides services to the instances at the layer above and requests service from the layer below.

For example, a layer that provides error-free communications across a network provides the path needed by applications above it, while it calls the next lower layer to send and receive packets that make up the contents of the path. Two instances at one layer are connected by a horizontal connection on that layer.

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