performance is required. A high-speed optical fiber cable network needs to properly select the appropriate testing instrument.
Laser and LED
The laser emitting power is very high, and the emitted light is very concentrated, while the light emitted by the LED is usually scattered and the power is low. Compared with LEDs, a laser can send high-speed pulses, which
With the increasing number of wireless applications in the world, the irony is that it is increasingly necessary to use wires and cables in high-speed environments. A senior system engineer named Carroll Wontrop from Danaher Motion in wooddell, Illinois, said: "wireless is a competitor, but in a habit, it may be difficult for users to perform conversions ".
People are worried that wireless communication will be vulnerable to interference from other wi
Many people doubt that the length of the network cable will affect the speed of the Internet, in fact, transmission speed is very fast, if the network cable is no problem, not blocking, the speed is no impact
But if the network cable
correlation. The third step, because there is no such problem on the first level switch and S5500 , all can be located in the first and two levels between the network cable, because the cable distance is longer, about 100m , and the field can not be replaced. Therefore consider can reduce the negotiation speed of the port to reduce the requirements of the networ
The following is the 3 machine in the same time period of network bandwidth usage, from the following three figures can be seen, machine a bandwidth usage is very unstable, suddenly high and low, the bandwidth used in the previous second 1M, the next second may reach 20M, machine B and machine C bandwidth usage is obviously more stable, first look at the following:Machine-AMachine-BMachine-CAbout machine A This situation, I started to think hard disk problems, hard disk for two years, there may
Symptom descriptionA certain Bureau adopts the MA5200 + 2403F networking mode. Due to the small amount of upstream optical resources, the 2403F cascade mode is adopted in the residential area, and the cascade mode adopts five category of twisted pair wires, you can use PPPOE to access the Internet. Some second-level switch users report that the Internet access speed is slow.Alarm informationThere are many CRC verification errors on the upstream port o
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