When Windows makes a CPU stop executing one thread's code and start executing another thread's code, we call this a context switch. A context switch is fairly expensive because the operating system has to: So circa CLR via C# 2.0 lets say we are on Pentium 4 2.4ghz 1 core non-HT, XP. Every 20 milliseconds? Driver Reviver 5.34.3.2. Windows 10 64 bit / Windows 10 / Windows Server 2012 / Windows 2008 64 bit / Windows 2008 / Windows 2003 / Windows 8 64 bit / Windows 8 / Windows 7 64 bit / Windows 7.
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Samsung Smart Switch is an easy-to-use tool for transferring content from other smartphones to Samsung mobile devices.
Seamless, Time-saving Content Transfer
Other content transfer tools are time consuming. Smart Switch offers a simple, do-it-yourself migration tool that you can install at home. With Smart Switch, you can transfer your personal data, media and apps with one service, without having to use multiple tools.
Simple, Do-it-Yourself
With Smart Switch’s easy-to-use, intuitive content transfer tool, you have the freedom to switch from other smartphone platforms without fear of losing your personal content. You can transfer personal content and apps from the comfort of your own home and at your own time.
Maintain Control of Your Lifestyle
Most people are unaware of the universe of apps available on Samsung smartphones. For example, there are more than 700,000 apps available on Google Play. Within this large universe of apps, Smart Switch helps you find your favorite apps so that you do not have to search for them individually. Smart Switch gives you the peace of mind that your apps have been transferred.
Free Content Transfer Service, Easy Download
Just Download, Click and Go: Smart Switch is up and running in seconds, allowing you to transfer content easily and with no cost or fees.
Upgrade your Samsung Galaxy phone with fast and easy content transfer
Smart Switch Mobile offers you the easiest, fastest and safest way to transfer data from your old to new Galaxy smartphone. You can transfer content such as music, video, photos, memos, messages, contacts, calendar and other documents stored in your phone.
What's New:
For Android:
Smart Switch Mobile lets you transfer data between GALAXY phones with ease. Place the devices close together (within 20cm), open the application in both phones and tap Connect button on only one of the devices. You can instantly transfer your personal data between GALAXY phones.
This application uses high frequency audio to establish a connection between devices. You may not be able to connect if the application is not open or the button is not tapped on one of the devices, or if a pair of eaphones or a Bluetooth headset is connected to the device.
If you are looking to switch from a non-Samsung device to a supported Samsung device, please use the 'Smart Switch PC' that is PC software. For more information, go to here.
Supported GALAXY Device:
Supported Data:
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(Redirected from Network Switch)
AvayaERS 2550T-PWR, a 50-port Ethernet switch
A network switch (also called switching hub, bridging hub, and by the IEEEMAC bridge[1]) is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device.
A network switch is a multiport network bridge that uses MAC addresses to forward data at the data link layer (layer 2) of the OSI model. Some switches can also forward data at the network layer (layer 3) by additionally incorporating routing functionality. Such switches are commonly known as layer-3 switches or multilayer switches.[2]
Switches for Ethernet are the most common form of network switch. The first Ethernet switch was introduced by Kalpana in 1990.[3] Switches also exist for other types of networks including Fibre Channel, Asynchronous Transfer Mode, and InfiniBand.
Unlike less advanced repeater hubs, which broadcast the same data out of each of its ports and let the devices decide what data they need, a network switch forwards data only to the devices that need to receive it.[4]
Overview[edit]
Cisco small business SG300-28 28-port Gigabit Ethernet rackmount switch and its internals
A switch is a device in a computer network that connects other devices together. Multiple data cables are plugged into a switch to enable communication between different networked devices. Switches manage the flow of data across a network by transmitting a received network packet only to the one or more devices for which the packet is intended. Each networked device connected to a switch can be identified by its network address, allowing the switch to direct the flow of traffic maximizing the security and efficiency of the network.
A switch is more intelligent than an Ethernet hub, which simply retransmits packets out of every port of the hub except the port on which the packet was received, unable to distinguish different recipients, and achieving an overall lower network efficiency.
An Ethernet switch operates at the data link layer (layer 2) of the OSI model to create a separate collision domain for each switch port. Each device connected to a switch port can transfer data to any of the other ports at any time and the transmissions will not interfere.[a] Because broadcasts are still being forwarded to all connected devices by the switch, the newly formed network segment continues to be a broadcast domain. Switches may also operate at higher layers of the OSI model, including the network layer and above. A device that also operates at these higher layers is known as a multilayer switch.
Segmentation involves the use of a switch to split a larger collision domain into smaller ones in order to reduce collision probability and to improve overall network throughput. In the extreme case (i.e. micro-segmentation), each device is located on a dedicated switch port. In contrast to an Ethernet hub, there is a separate collision domain on each of the switch ports. This allows computers to have dedicated bandwidth on point-to-point connections to the network and also to run in full-duplex mode. Full-duplex mode has only one transmitter and one receiver per collision domain, making collisions impossible.
The network switch plays an integral role in most modern Ethernet local area networks (LANs). Mid-to-large sized LANs contain a number of linked managed switches. Small office/home office (SOHO) applications typically use a single switch, or an all-purpose device such as a residential gateway to access small office/home broadband services such as DSL or cable Internet. In most of these cases, the end-user device contains a router and components that interface to the particular physical broadband technology. User devices may also include a telephone interface for Voice over IP (VoIP).
Role in a network[edit]
Switches are most commonly used as the network connection point for hosts at the edge of a network. In the hierarchical internetworking model and similar network architectures, switches are also used deeper in the network to provide connections between the switches at the edge.
In switches intended for commercial use, built-in or modular interfaces make it possible to connect different types of networks, including Ethernet, Fibre Channel, RapidIO, ATM, ITU-TG.hn and 802.11. This connectivity can be at any of the layers mentioned. While the layer-2 functionality is adequate for bandwidth-shifting within one technology, interconnecting technologies such as Ethernet and token ring is performed more easily at layer 3 or via routing.[6] Devices that interconnect at the layer 3 are traditionally called routers.[7]
Where there is a need for a great deal of analysis of network performance and security, switches may be connected between WAN routers as places for analytic modules. Some vendors provide firewall,[8][9] network intrusion detection,[10] and performance analysis modules that can plug into switch ports. Some of these functions may be on combined modules.[11]
Through port mirroring, a switch can create a mirror image of data that can go to an external device such as intrusion detection systems and packet sniffers.
A modern switch may implement power over Ethernet (PoE), which avoids the need for attached devices, such as a VoIP phone or wireless access point, to have a separate power supply. Since switches can have redundant power circuits connected to uninterruptible power supplies, the connected device can continue operating even when regular office power fails.
Bridging[edit]Contexts 3 4 2 – Fast Window Switcher Systems Home Theater Systems
A modular network switch with three network modules (a total of 24 Ethernet and 14 Fast Ethernet ports) and one power supply.
A 5-port layer-2 switch without management functionality
Modern commercial switches use primarily Ethernet interfaces. The core function of an Ethernet switch is to provide multiport layer-2 bridging. Layer-1 functionality is required in all switches in support of the higher layers. Many switches also perform operations at other layers. A device capable of more than bridging is known as a multilayer switch.
A layer 2 network device is a multiport device that uses hardware addresses, MAC address, to process and forward data at the data link layer (layer 2).
A switch operating as a network bridge may interconnect devices in a home or office. The bridge learns the MAC address of each connected device. Bridges also buffer an incoming packet and adapt the transmission speed to that of the outgoing port. While there are specialized applications, such as storage area networks, where the input and output interfaces are the same bandwidth, this is not always the case in general LAN applications. In LANs, a switch used for end-user access typically concentrates lower bandwidth and uplinks into a higher bandwidth.
Interconnect between switches may be regulated using spanning tree protocol (STP) that disables links so that the resulting local area network is a tree without loops. In contrast to routers, spanning tree bridges must have topologies with only one active path between two points. Shortest path bridging is a layer 2 alternative to STP that allows all paths to be active with multiple equal cost paths.[12][13]
Types[edit]
A rack-mounted 24-port 3Com switch
Form factors[edit]
Switches are available in many form factors, including stand-alone, desktop units which are typically intended to be used in a home or office environment outside a wiring closet; rack-mounted switches for use in an equipment rack or an enclosure; DIN rail mounted for use in industrial environments; and small installation switches, mounted into a cable duct, floor box or communications tower, as found, for example, in fiber to the office infrastructures.
Rack-mounted switches may be standalone units, stackable switches or large chassis units with swappable line cards.
Configuration options[edit]![]()
Typical management features[edit]
A couple of managed D-Link Gigabit Ethernet rackmount switches, connected to the Ethernet ports on a few patch panels using Category 6patch cables (all equipment is installed in a standard 19-inch rack)
Traffic monitoring[edit]
It is difficult to monitor traffic that is bridged using a switch because only the sending and receiving ports can see the traffic.
Methods that are specifically designed to allow a network analyst to monitor traffic include:
These monitoring features are rarely present on consumer-grade switches. Other monitoring methods include connecting a layer-1 hub or network tap between the monitored device and its switch port.[16]
See also[edit]Contexts 3 4 2 – Fast Window Switcher Systems IncNotes[edit]
References[edit]
External links[edit]
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Network_switch&oldid=981104783'
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