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Bring yourself up to speed with our introductory content.
Get started
Bring yourself up to speed with our introductory content.
Session layer
In the Open Systems Interconnection (OSI) communications model, the session layer resides at Layer 5 and manages the setup and teardown of the association between two communicating endpoints. Continue Reading
OSI model (Open Systems Interconnection)
OSI (Open Systems Interconnection) is a reference model for how applications communicate over a network. Continue Reading
presentation layer
Residing at Layer 6 of the Open Systems Interconnection (OSI) communications model, the presentation layer ensures that the communications that pass through it are in the appropriate form for the recipient application. Continue Reading
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5G
Fifth-generation wireless, or 5G, is the latest iteration of cellular technology, engineered to greatly increase the speed and responsiveness of wireless networks. Continue Reading
Understand the basics of 5G wireless networks
5G wireless networks offer enterprises a lot of intriguing possibilities. What exactly is 5G, and what has to happen before the high-speed, low-latency technology becomes a reality? Continue Reading
Power over Ethernet (PoE)
Power over Ethernet (PoE) is a technology for wired Ethernet local area networks (LANs) that allows the electrical current necessary for the operation of each device to be carried by the data cables rather than by power cords.Continue Reading
Application layer
Sitting at Layer 7 -- the very top of the Open Systems Interconnection (OSI) communications model -- the application layer provides services for an application program to ensure that effective communication with another application program on a ...Continue Reading
physical layer
Located at the lowest layer of the Open Systems Interconnection (OSI) communications model, the physical layer's function is to transport data using electrical, mechanical or procedural interfaces.Continue Reading
transport layer
Positioned at Layer 4 of the Open Systems Interconnection (OSI) communications model, the transport layer ensures the reliable arrival of messages across a network and provides error-checking mechanisms and data flow controls.Continue Reading
Network layer
Located at Layer 3 of the Open Systems Interconnection (OSI) communications model, the network layer's primary function is to move data into and through other networks.Continue Reading
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Data-Link layer
The data link layer is the protocol layer in a program that handles the moving of data into and out of a physical link in a network.Continue Reading
What cloud data center interconnect technologies can do
Data center interconnect technologies and services now use cloud. Learn how CDCI improves traffic delivery and how to choose the right equipment and services.Continue Reading
fault management
Fault management is the component of network management concerned with detecting, isolating and resolving problems.Continue Reading
bandwidth
Bandwidth is the capacity of a wired or wireless network communications link to transmit the maximum amount of data from one point to another over a computer network or internet connection in a given amount of time -- usually one second.Continue Reading
network configuration management (NCM)
Network configuration management is the process of organizing and maintaining information about all the components of a computer network.Continue Reading