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Two-tier switch:Two-layer switching technology is the development of more mature, two-layer switch is a data link layer device, can identify the MAC address information in the packet, according to the MAC address forwarding, and these MAC addresses and corresponding ports recorded in their own internal address table.Specific as follows:(1) When the switch receives a packet from a port, it reads the source MAC address in the header, so that it knows th
Especially when the user's network is not crowded and there is still a lot of available space, the use of the HUB can make full use of the existing resources of the network, the switch bus bandwidth exceeds N × M, then, this switch can achieve line rate switching. With the popularization of broadband and the deepening of various network applications, our local network is undertaking heavy business traffic. The amount of transmitted audio, video, data,
1. From circuit switching technology to group Switching Technology The most basic application of circuit switching is that a signal occupies one line. This physical line is occupied by this signal until the electronic switch switches to another signal. This signal can be a digital signal or analog signal. To transmit multiple signals on a physical line and improv
The elephant will be installed in a refrigerator, a total of three steps, a refrigerator door open, two elephants into, three refrigerator door close, simple and rough. Unfortunately, our process and the conversion of the thread is not the elephant refrigerator problem, not nonsense, back to the point.General process switching is divided into two stepsFirst of allToggles the page directory to use the new address spaceAnd thenToggle kernel stack and ha
1-4-3. Calculation of energy storage inductance of the parallel switching power supplySimilar to the numerical method used to calculate the energy-saving inductance in the inverted series switching power supply, the energy storage inductance of the parallel switching power supply is also analyzed starting from the critical continuous current state of the current
In order to adapt to the challenges brought by the deepening of network applications, the scale and speed of the network are rapidly developing. The speed of the LAN has increased from 10 Mbit/s to 100 Mbit/s, currently, Gigabit Ethernet technology is widely used. In terms of network structure, it has also evolved from the LAN of shared media to the current LAN. The exchange LAN technology enables dedicated bandwidth to be exclusive to users, greatly improving the efficiency of LAN transmission.
Author:drivermonkeyMail:[email protected]phone:13410905075qq:196568501is Linux threads the same as other implementations? No. They is better-while mostly keeping the same API. As stated above, most multithreaded OSs define a thread separately from processes. Linus Torvalds has defined, a thread is a "context of execution" (COE). This means, one process/thread table and one scheduler is needed. Also The scheduler have been optomized so, the switching
It feels good to see an image Switching Effect of alibaba. But there are a lot of code. If you look dizzy, come on your own. With experience in performing image slide display, it is much easier to do this. It feels good to see an image Switching Effect of alibaba. But there are a lot of code. If you look dizzy, come on your own. With experience in performing image slide display, it is much easier to do this
Group First, let's look at the concept of the next grouping. The so-called grouping is to divide a packet into smaller packets. For example, for a 10GB packet, it is not always a one-time delivery of the past bar, but it is divided into a number of small packets sent past. Structure diagram for each block of data:File headers are typically descriptive data, such as source and destination addresses, data types, and so on. The data part is what is really going to be communicated to the objectCircu
Frame switching is the exchange technology used by frame relay, while cell switching is the exchange technology of ATM. They all belong to the fast group switching technology. The main difference is that the frame length of the former is variable, the frame cell length of the latter is fixed. For example, if the fixed value of ATM is 53 bytes, I checked it and fo
AngularJs application page switching optimization solution, angularjs page Switching The name of a product under research and development in Grape city is tentatively set to Project X. Among them, SpreadJS products in wijmo are used. In addition, some R D summaries are sorted out during the R D process and shared with you. For example, in this article, we will discuss the optimization scheme during page s
1-3-2. Calculation of energy storage inductance of inverted series Switching Power SupplyThe calculation method of the energy storage inductance of the inverted series switching power supply is basically the same as that of the previous "calculation of the energy storage filter inductance of the tandem Switching Power Supply". The value of the energy storage indu
First look at the effect: This is the first image switching based on the addition of a number of surface effects to do, the method is not complicated, as long as a layer, put on the top, the content as the mask layer on the line.Specific practices:1. Open the last time you made the FLA file, save it as a new document, or copy a copy directly under Windows. Do a second kind of special effects.2. As a surface effect, you should add a layer above the ma
There are many things worth learning about layer-3 switching technology. Here we mainly introduce the comprehensive comparison between layer-2 switching and layer-3 switching technology. In today's network construction, the layer-3 switching technology is recognized and praised by users for its efficient performance, e
1-2-3. Calculation of energy storage filter inductance of tandem Switching Power SupplyFrom the above analysis, we can see that the output voltage of the tandem switch power supply is related to the duty cycle D of the control switch and the energy storage inductance L, because the energy storage inductance L determines the current rise rate (DI/dt), that is, the output current size. Therefore, it is important to correctly select the parameters of the
A simple and practical example of small image switching, simple and practical image Switching I accidentally saw this little thing I previously wrote and pasted it. It supports click switching and automatic carousel for beginners to check it out! The Code is as follows:You only need to change the image path to your local one.. Scroll_div {width: 1000px; height: 3
1-6-3. Calculation of circuit parameters of the switch power supply of the forward-facing TransformerThe circuit parameter calculation of the switching power supply of the excited transformer mainly calculates the energy storage filter inductance, the energy storage filter capacitor, and the parameters of the switching power supply transformer.Calculation of energy storage filter inductance and energy stora
1-2-2. Output Voltage filter circuit of the tandem switch power supplyMost of the output of the switching power supply is DC voltage. Therefore, the output circuit of the general switching power supply has a rectifying and filtering circuit. Figure 1-2 shows the working principle of the series-connected switching power supply with the rectification and filtering
Oracle Dataguard normal switching and emergency switching Oracle Dataguard provides disaster-tolerant solutions that can effectively prevent single points of failure and provide highly available technology, here is a description of the Dataguard normal main-standby switch and emergency switching (emergency switching
The simplest image switching effect, supporting banner image switching development on pc and mobile terminals, For details, click I accidentally saw an image switch I wrote two years ago. I just learned how to create a web page. It can be said that it was my first jquery image switch in Virgo. When I'm bored, I made a slight modification to its width, which turned into a banner image
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