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A device connected to several other devices. In ARCnet, a hub is used to connect several computers together. In a messagehandling service, a hub is used for transfer of messages across the network. An Ethernet hub is basically a “collapsed networkinabox” with a number of ports for the connected devices. A network device used to connect multiple systems together in a star topology. Hubs repeat inbound traffic over all outbound ports.

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A mechanical, electrical, or electronic device that opens or closes circuits, completes or breaks an electrical path, or selects paths or circuits. A switch looks at incoming data to determine the destination address. Based on that address, a transmission path is set up through the switching matrix between the incoming and outgoing physical communications ports and links. A network device that is an intelligent hub because it knows the addresses of the systems connected on each outbound port. Instead of repeating traffic on every outbound port, a switch repeats only traffic out of the port on which the destination is known to exist. Switches offer greater efficiency for traffic delivery, create separate broadcast and collision domains, and improve the overall throughput of data.
<p>The Cloud Security Alliance (CSA) STAR is the industry’s most powerful program for security assurance in the cloud. STAR encompasses key principles of transparency, rigorous auditing, and harmonization of standards. The STAR program provides multiple benefits, including indications of best practices and validation of security posture of cloud offerings.<br></p><p>Level 1: Self-assessment<br>Level 2: External third-party attestation<br>Level 3: Continuous-monitoring program</p>
(1) Layer 2 of the OSI Reference Model. Provides reliable transit of data across a physical link. The datalink layer is concerned with physical addressing, network topology, line discipline, error notification, ordered delivery of frames, and flow control. The IEEE divided this layer into two sublayers: the MAC sublayer and the LLC sublayer. Sometimes simply called the link layer. Roughly corresponds to the datalink control layer of the SNA model. (2) A layer with the responsibility of transmitting data reliably across a physical link (cabling, for example) using a networking technology such as Ethernet. The DLL encapsulates data into frames (or cells) before it transmits it. It also enables multiple computer systems to share a single physical medium when used in conjunction with a media access control methodology such as CSMA/CD.
A converged protocol used to encapsulate Fibre Channel communications over Ethernet networks. It typically requires 10 Gbps Ethernet in order to support the Fibre Channel protocol.
The physical layout and organization of computers and networking devices.

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