Understanding Protocols and the OSI Network Model Getting a handle on the invisible part of your network—the protocols that are in use—can be of enormous value in helping you detect problems.

The network access layer is equivalent to OSI layers 1 and 2. The Internet Protocol layer is comparable to layer 3 in the OSI model. The host-to-host layer is equivalent to OSI layer 4.

This paper explains the 2 popular reference models: OSI reference model and TCP/IP model, by comparing the functionality of each layer in both models.

IBM misplayed its hand with SNA and OSI never had a chance against TCP/IP. The long, slow and at times, colorful battle between TCP/IP backers and SNA stalwarts was one of the more acrimonious ...

What does OSI model actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

Whether it’s wired or wireless, most data communications today happens by way of packets of information travelling over one or more networks. But before these networks can work ...

What does Ethernet and TCP/IP actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.