You can ping others, but don’t ping yourself and you can’t access the Internet.

This phenomenon is caused by three reasons: 1. Responsibility of the operator (failure of transmission and switching network): The operator must ensure the signal quality (bandwidth, bit error rate, signal quality) to the user. Hybrid ratio, transmission rate, signal level, input and output impedance, signal stability, input and output impedance stability) comply with national standards); specific phone number: Telecom 10000 China Netcom 10060 Tietong 10050 2: Website problems: 1: Website server Unstable; 2: The software of the website is unstable; 3: The quality of website operation and maintenance is low; faults cannot be eliminated in time; for example: access to other websites is good, but a certain website is particularly poor. This is a problem with the website itself and has nothing to do with the operation. There is no relationship between merchants and users. ★Copyright Statement: This answer is the original work of Harmony and no one may steal it! ★3: User (Responsibility) The following factors will lead to your current status. If it is tested that there is no problem with the above operators, then it is your own problem as a user. ; If you do not have the following problems, you can call the operator directly and ask the operator to handle the operator's own related matters for you. ★Copyright Statement: This answer is the original work of Harmony and no one may misappropriate it! ★The reasons and solutions for this phenomenon are based on the premise that the user's equipment settings must be correct: 1: Power supply 1.1 Use a multimeter to check whether the power supply is stable? 1.2 Is the AC voltage fluctuation within the allowable range? Does it exceed 5% of the rated voltage? 1.3 Is the ripple coefficient of the A/D power supply qualified (checked with a millivolt meter)? 1.4 Is the temperature rise of the power supply abnormal? 1.5 Do the voltage stabilization characteristics meet the technical specifications? 1.6 Do the voltage stabilization characteristics and ripple coefficient meet the technical specifications under 1.5 rated load? 1.7 When replacing a larger fan, does your power supply capacity meet the requirements? 1.8 The power supplies of general auxiliary equipment (routers, network switches, modems, etc.) are rectified power supplies without voltage stabilization function. The ripple coefficient is large (may be caused by drying up of the filter capacitor) and the load capacity is also poor; heat causes the equipment to fail. work, special attention should be paid to monitoring during operation. 1.9 Due to equipment overvoltage (just like feeding a child, if you feed a child too much, you will die), low voltage (like feeding a child, if you feed a child too little, you will be malnourished), and excessive voltage fluctuations (just like feeding a child, one meal when hungry and one meal when full). (indeterminate amount of pauses), overcurrent, and heat, causing the overheating protection action to cut out a fault and remove the equipment from operation (i.e., slow, delayed, repeated starts, delays, dropped calls, interruptions, disconnections, automatic shutdowns, crashes, etc.) Display image), etc.; 1.10 Does the overcurrent protection and overheating protection of the power supply operate correctly? Is the action sensitive? Does it refuse to move or move by mistake? ★Copyright Statement: This answer is original to Harmony and no one may steal it! ★2: Check the network cable and crystal head (R45): 2.1 Are the crystal head and socket plugged in properly (are they loose)? 2.2 Is the contact good? What is the contact resistance? 2.3 Is there any dust accumulation? Is it oxidized? 2.4 Is the mechanical lock between the crystal head and the base locked? 2.5 Is the locking firm? 2.6 Are the network cable and crystal head pressed tightly and in good contact? 2.7 The line-to-line insulation resistance of the network cable (using a 100V megger) should be greater than 20 megohms. ★Copyright Statement: This answer is the original work of Harmony and no one may misappropriate it! ★3: Lightning protection and grounding: Grounding is mainly to ensure the safety of people and equipment! Lightning strikes will burn the network card; in severe cases, it can cause fires and casualties! The principles are multi-point grounding, repeated grounding, and nearby grounding; grounding is divided into protective grounding, shielding grounding, working grounding, etc.; Static electricity is the culprit causing a blue screen of crash! I used a noise meter to test that the noise voltage when not grounded was more than 6,000 times greater than the signal. If you are not grounded, can your equipment work with such high noise? Grounding is the most basic requirement for IT. This is true for analog equipment and even more so for digital circuits. Interference from all aspects can be reduced or eliminated through grounding, including external interference and inter-line coupling of local and local wiring. Reduce and eliminate, and do a good job of grounding and shielding the equipment. Many interferences come from poor shielding and poor grounding. Many people only work on software. Many interferences are caused by poor or no grounding. This kind of Faults are very easy to occur and are easily ignored by many people. Many equipment damages are directly related to grounding. No grounding or poor grounding will lead to inter-code interference, bit errors, delays, packet loss, intermittent, and disconnection (disconnection, interruption). ), crashes, stuck, automatic shutdown, repeated startup, repeated startup, frequent restart (or repeated connection) and other phenomena. There must be more than two grounding poles, with a minimum distance of more than 10 meters between each grounding pole. The grounding wires from the grounding poles to the computer room must not have any joints. They must be introduced into the computer room with soft copper wires with a cross-section of not less than 25 square millimeters. Bus bar (no joints are allowed in the middle), the ground wire is symmetrically connected to the Faraday net to facilitate the distribution of current. The connection point with the bus bar must be coated with silver powder conductive paste. The cross section of the ground wire from each device to the bus bar (independent) must not be Less than 4 square meters of multi-stranded soft copper wire, the ground resistance of the busbar to each ground electrode is less than 5 ohms (the smaller, the better).

Use a grounding meter (a grounding meter measuring level 2.5 or above, and the meter is within the inspection qualification period) to check at least twice a year. When checking the grounding electrode, it is strictly prohibited to do it in thunderstorm weather. It is strictly forbidden to use the N neutral line of water pipes and power lines as grounding; that is, an independent grounding device. The wires of each device are independently connected to the bus in the computer room. It is strictly prohibited to connect them in series and then connect to the bus. I can say very subjectively: No matter you are an individual user or a collective user in a large computer room, you have no grounding at all (or the grounding is unqualified). ★Copyright Statement: This answer is an original work of Harmony and no one may steal it! ★4: Bandwidth: The bandwidth from the operator to the user is very important. Without enough bandwidth, sufficient data flow cannot be guaranteed; computer Internet access cannot be smooth; The bandwidth mentioned above refers to the bandwidth of the whole process. Just like on a highway, with such a wide bandwidth, there should be no fluctuations in the whole process; a slight fluctuation in the whole process will affect the network speed; users have the right to request the operator (use a frequency scanner) Test) is guaranteed; ★Copyright statement: This answer is a harmonious original and no one may steal it! ★5: Signal-to-noise ratio: (The ratio of signal to noise, which can be understood as the purity of the signal) When it is small, the useful signal is noisy Covered by spurious signals (especially inter-symbol interference between symbols), the receiving path cannot correctly extract useful signals from the noisy signals, and the judgment circuit cannot correctly judge the symbols, which will The occurrence of bit errors and severe bit errors is packet loss. Severe packet loss is the cause of delay. Severe delay is the cause of disconnection (slowness, delay, repeated startup, disconnection, delay, disconnection, interruption, etc.). disconnection, automatic shutdown, crash, etc.), use a noise meter or level meter to measure whether the noise level is within the allowable range, or use an oscilloscope to observe whether there are spurious signals? Is there inter-symbol interference between codes? Take measures to eliminate it. The signal-to-noise ratio should also be greater than 60dB. Test (observe) with a scanner and oscilloscope. This indicator is to ensure smooth and barrier-free roads. With such a wide road, it must be barrier-free throughout. ★Copyright Statement: This answer is the original work of Harmony and no one may steal it! ★6: Matching: Matching includes level matching and impedance matching (tested with a level meter and signal generator) 6.1 Level matching: The received signal cannot be too low , when it is too low, it cannot reach the threshold level amplitude required by the receiving circuit, and the equipment cannot work normally; when the level is too high, the receiving circuit pre-circuit will be saturated or burned out. If the reception level fluctuates near the reception threshold, the computer will restart frequently and repeatedly; therefore, reception level adjustment is very important. During operation, always use a level meter or oscilloscope to monitor and adjust the reception level at the connection within a suitable amplitude range. Monitor adjustments with a level meter according to the instructions. 6.2: Impedance matching: The connection points must achieve relative impedance matching. Mismatching of input and output impedance will lead to reflection loss, and the signal will not work properly no matter how strong it is. ★Copyright Statement: This answer is a harmonious original and no one may steal it! ★7: Optimize the network structure. When people turn on the computer and surf the Internet, garbage will be generated. Just like eating, not clearing the table, washing the tableware, and cleaning the stove will also produce computer garbage. Computers It will gradually manifest itself as slow, stuck, delayed, repeated startup, disconnection and other faults; therefore, I personally recommend using some small tools: such as Super Rabbit, Optimization Master, Master Lu or 360, etc.; develop the habit of cleaning up garbage before going offline. Good habits. 7.1: Clear the garbage fragments and IE cache generated by surfing the Internet in a timely manner: As long as you use the computer, garbage will be generated. If you don’t clean it up in time, it will accumulate more and more. If you don’t clean it up for a long time, the running C drive space will become smaller and more cluttered. , and finally gradually slows down until it crashes; therefore, regular cleaning and running of the C drive can maintain the computer's running speed.

7.2: Synchronize the ADSL device first: power off the device and then restart it. ★Copyright statement: This answer is the original work of Harmony and no one may misappropriate it! ★8: Software settings and configuration 8.1: Download commonly used software from large official websites as much as possible, and do not install 3, informal software, P2P ( Do not install software that takes up resources) and do not install rarely used software. Turn off all unnecessary network connections and startup items, such as Thunder, BT, Donkey, etc.; do not put non-running software in the running c drive; update patches in real time. Game software should be downloaded from regular large-scale websites, and pay attention to whether the software is stable. Immature and unstable software will cause slowdowns, freezes, crashes and other failures, especially for some popular game software. Some netizens have strong reactions to this, so Pay special attention to the software or delete it immediately; when downloading software, pay attention to rogue software that takes the opportunity to insert and endanger the security of the computer, and remove it at any time. Many acceleration software contain viruses or adware plug-ins, which occupy your disk resources. After some game software is started, the game will be shut down directly, and after it comes up, it will experience infinite disconnection, restart and other failures. Protocol: The protocol in the network must also match it. Mismatching may also cause some device failures. Software conflicts can also cause problems such as delays, lags, slowdowns, crashes, disconnections, and interruptions. 8.2: Anti-virus software and firewall: At least one effective and genuine anti-virus software and frequently upgrade the virus database: appropriate firewall settings (not too many, too high, too low) will cause some web pages to be unable to be opened; viruses can slow down the computer, Crash, disconnection, stuck, repeated startup and power on/off failure.

★Copyright statement: This answer is original to Harmony and no one may steal it! ★9: Temperature, humidity, and temperature rise. As the boot time increases, the temperature of the main device and its auxiliary devices (modem, router, network switch, etc.) will change. It will gradually increase. If it cannot be dissipated quickly, it will be delayed---slow---dropped---crash. 9.1: Humidity: In rainy seasons or rainy days and in high-humidity areas, the insulation between lines and devices decreases, and the signal level drops, resulting in computer code-to-code interference, bit errors, delays, packet loss, intermittent, and dropped calls (short lines or interruption), crash, automatic shutdown, repeated startup (repeated connection) and other phenomena, or unstable operation. Humidity accelerates oxidation, causing transmission interruptions. 9.2: Temperature (with the arrival of Beginning of Autumn, the faults caused by high temperature will gradually decrease): From the beginning of startup, the temperature will gradually increase. When the temperature rises to a certain level, it will stabilize at this value. This value is consistent with The difference in ambient temperature should not be greater than 25 degrees; since computers are semiconductor devices, the actual temperature of the device must not be higher than 85 degrees; when the chip temperature approaches 80 degrees, measures must be taken to reduce the working environment temperature of modems, routers, network switches and computer equipment . If the computer exceeds this range, it will cause inter-code interference, bit errors, delays, packet loss, intermittent, disconnection (disconnection or interruption), crash, automatic shutdown, repeated startup (frequent connections) and other phenomena. ★Copyright Statement: This answer is original to Harmony and no one may steal it! ★9.3: Temperature rise (the difference between the actual temperature of the device and the ambient temperature is called temperature rise) is less than 25 degrees Celsius, which has a great impact on the normal operation of the device, especially the network When the temperature rise of switches, routers, computer motherboard chips, network cards, etc. is large, the equipment will not be able to operate; especially portable (also called notebook) computers, which have difficulty in dissipating the temperature rise due to the design priority given to size, and are most prone to temperature rise. The resulting phenomena include inter-code interference, bit errors, delays, packet loss, intermittent, dropped calls (short lines or interruptions), crashes, automatic shutdowns, repeated startups (repeated connections), etc. The measures are as follows: a: Place the equipment (referring to: Hubble, modem, router or network switch, computer, etc.) in a place that is safer for people. First disconnect the power supply, then open the cover of the equipment, and use air convection to enhance the connection with the air. Contact for natural heat dissipation;

b: Install a micro fan on the device to increase air convection and force heat dissipation;

c: If you are in IT, I recommend You: After disconnecting the power supply, install heat sinks on the heating components of the device.

d: After the device is disconnected from the power supply, use a 3mm drill bit to drill multiple holes up and down the device to enhance air convection and improve heat dissipation conditions; e: Place the device in a ventilated and dry place, preferably in a (There are also insulating heat dissipation brackets on the market for notebooks.) Use the insulating heat dissipation bracket to support the device and dissipate heat naturally; f: After the computer is used for a long time, when the silica gel between the CPU and the heat sink dries up, the CPU will seriously heat up and produce Packet loss, delay, slowness, repeated startup, disconnection, interruption, disconnection, automatic shutdown, crash, etc. Reapply silicone and resume normal use.

g: Clear the garbage fragments and IE cache generated by surfing the Internet in a timely manner: As long as you use the computer, garbage will be generated. If you don’t clean it up in time, it will accumulate more and more. If you don’t clean it for a long time, it will cause the C drive to run. The space becomes smaller and smaller and disorganized, and eventually slows down gradually until it crashes; therefore, regular cleaning and running of the C drive can maintain the computer's speed.

h: Let the ADSL device synchronize first: power off the device and then restart it. Users who frequently surf the Internet should open the device's shell after powering off for up to half a year (by the way, check whether the internal connections of the device are good, whether the memory module is loose, and whether the memory module is in good contact with the card slot? Are the plug-ins loose? Are they plugged in tightly? Are the connections Check whether the points are firm and in good contact), and clean the dust inside the equipment. 10: Wiring: The wiring process is based on the principle of minimum interference; the wiring is required to be neat and beautiful, with strong and weak signals separated, and high and low frequency signals separated. Unreasonable wiring will cause interference caused by coupling and crosstalk between lines, and lines cannot be entangled with each other. , it is best to use shielded (shielding layer is reliable and grounded) wires. These parasitic interference will reduce the signal-to-noise ratio of the computer and make it unable to identify useful signals, causing inter-code interference, bit errors, delays, packet loss, intermittent, and dropouts. Line (short line or interruption), crash, automatic shutdown, repeated startup (repeated connection) and other phenomena. ★Copyright statement: This answer is the original work of Harmony and no one may steal it! ★11: The motherboard’s button battery If the battery capacity is insufficient or there is no power, the computer may not be turned on or other malfunctions may occur. 12: ADSL users: multiplex computer signals with telephone lines, pay attention to the impact on the computer in the three states of picking up the phone, hanging up, and ringing; since both computer and telephone signals are transmitted on the telephone line (multiplexed), both A certain degree of isolation (greater than 60dB) must be provided between them, and the degree of defense must be greater than 60dbB (the bigger the better), especially some informal phones that will affect the use of the computer. 13: Timing failure: When the equipment fails at a fixed time, be careful to see if there are large factories or fixed-time electrical equipment starting, welding and other starting equipment around it and between its transmission paths. 14: A better solution to the slow speed of win7 should be this: enter the Windows 7 control panel, find and open color management. In the color management dialog box that opens, switch to the Advanced tab and click Change system defaults in the lower left corner.

Subsequently, the system will pop up a dialog box Color Management-System Default again. In this dialog box, also switch to the advanced options, and then uncheck the system default checkbox Use Windows Monitor Calibration? After modification, save the settings and exit. Theoretically, it is very slim to use any software to improve your network speed. It is difficult for us to observe that using any software can improve the network speed. This kind of software just installs some advertising junk plug-ins in your system. It is relatively slim that the software can improve the network speed. All of them Software acceleration, in fact, you can't feel it, it is usually a tool to add advertising. Not only does it not make you faster, but it will slow you down without you realizing it; it is not too much to say that it is a virus! ★Copyright Statement: This answer is the original creation of Harmony and no one may steal it! ★15: Users who use wireless transmission (mobile phones or wireless network cards, wireless routers, etc.) to access the Internet are more affected by the field strength of the receiving point (location). Large, it is also limited by the transmission bandwidth and the receiving geographical environment: your location and the standing wave coefficient of the antenna (preferably 1.2) have a great impact on the reception level, and you cannot rely solely on signal instructions (which may be reflected signals) The superposition value, rather than the main lobe wave speed of the wireless signal) determines the receiving field strength. Spatial obstruction is the main cause of attenuation. Try to avoid "getting to the point" between the receiving and the base station. The greater the antenna gain, the larger the size of the antenna and the stronger the directivity. Users should always pay attention. ★Copyright statement: This answer is a harmonious original and no one may misappropriate it!★ 16: Multi-machine (protocol interface) *** Internet access problem: In order to protect the security of the Internet; the operator is based on the "On Protecting the Security of the Internet" issued by the Ministry of Public Security Relevant Regulations": One account has one terminal to facilitate the security monitoring of the Internet; when one account has multiple terminals: the relevant certificates of the relevant terminal users must be issued and strictly registered and filed; in order to prepare for the network security department to monitor and supervise network security , Supervise and monitor; prevent criminals from using the Internet to carry out criminal activities or carry out sabotage activities on the Internet! Fight against criminal activities using the Internet at any time! It is the user's obligation to cooperate with this work! ★Copyright Statement: This answer is original to "Harmony" and no one may steal it! ★From a technical perspective: Using other technical measures such as routers, dual network cards, and network switches, one account can be used to access the Internet on multiple machines. There is absolutely no technology. Question: For the sake of Internet security, we must still be law-abiding citizens and surf the Internet reasonably, reasonably and legally; and contribute to maintaining a harmonious society! If you need to use one account to access the Internet on multiple computers, you should go to the relevant departments to register and file in detail; for those who have not registered: the operator will use network monitoring software to implement real-time detection in accordance with the law; and take corresponding measures in accordance with the law (page notification, forced disconnection, etc. Multiple restrictive measures) to implement warning measures for users, Xiehe requires users to go through corresponding procedures (one terminal, one account); multiple terminals with one account must go through corresponding procedures and register carefully in accordance with the law. However, some operators enforce this regulation for financial gain, and some operators implement it less strictly in order to retain customers. Please consult your local operator for details, okay? ★Copyright statement: This answer is original to "Harmony" and no one may steal it! ★As long as you carefully follow the above and keep doing it regularly, you will be able to play mid-range games smoothly with a normal configuration; otherwise: No matter how high-configuration the computer is, it will still have frequent failures; the key depends on who uses it; if a person with high quality uses it, it will still run smoothly with a lower configuration; for a person with low quality, no matter how high-configuration it is, it will still have frequent failures; like a person wearing a computer Clothes (Short sketch: Chen Peisi in Good Guys and Bad Guys: No matter how good you give him the best clothes, he won’t be of a higher grade!) are the same. Clothes don’t have to be high or low, as long as they are clean and neat, they are good.

Only those who are not afraid of hardships and dangers can hope to reach the other side of their ideals! Thank you for accepting my answer!

Thank you: friend! ;'.,-'.;