GPS Beidou synchronous clock (network time source) helps digital government affairs system

GPS Beidou synchronized clock (network time source) assists digital government affairs system GPS Beidou synchronized clock (network time source) assists
digital government affairs system
With the increasing number of servers and servers, these devices have their own clocks, which can be adjusted, so the time of all devices and hosts in the network cannot be guaranteed to be synchronized. After long-term operation, the time difference will become larger and larger. The impact is not too great, but with the continuous development of various network applications, the requirements for time are getting higher and higher, and time out of sync will cause many unexpected problems. Next, we will discuss the role of NTP in combination with the actual network architecture. Solutions in the government affairs network.
What is a network time service?
Clock synchronization is also called "clock synchronization". In the field of communication, the concept of "synchronization" refers to frequency synchronization, that is, the clock frequency and phase synchronization of each node in the network, and its error should meet the requirements of relevant standards. Time synchronization refers to the synchronization of the time and time interval of the clocks of each node in the network and the clocks of each application interface connected through the network with the Coordinated Universal Time (UTC), at least in a local or metropolitan area network to synchronize with Beijing time. The time synchronization network is the basis for ensuring time synchronization. The time synchronization network can be formed in a wired or wireless manner.
In the TCP/IP protocol, the protocol used for network synchronization time is the NTP protocol. It is designed and implemented by a professor at the University of Delaware in the United States. It is a communication protocol that keeps computers on the network time-synchronized. Its own transmission is based on UDP. The port number 123 is reserved. The NTP protocol can estimate the round-trip delay of data packets on the network, and can independently estimate the computer clock deviation, so as to achieve reliable and accurate time synchronization between computers. NTP is a dynamic, stable and fault-tolerant protocol used to ensure The clock accuracy error of all devices in the network is within 1ms. This protocol is defined in RFC958, after which the NTP protocol is constantly modified to add more redundancy and security features. Other RFCs related to time synchronization include RFC1128, RFC1129, RFC1165, RFC1305, and RFC2030.
Some people may think that the computer's clock is a little bit off. In fact, this is very wrong. The time stamps in file storage, file transfer, and e-mail in the computer system are all based on the computer clock. If you want to search for files in the future, For log query, if the system clock is inaccurate, or the computer time in the same network is not synchronized, it will bring a lot of trouble to the follow-up work. Nowadays, many backup software, translation software, and FTP tools are compared based on the file storage time. If the time is not uniform, it will make it difficult for these software to work properly.
In network management, when we check the operation status of various network management software systems in the network, or server logs, we find that the system time on different devices is different, and we want to observe a certain one through LOG information (console output or syslog records). It is very inconvenient for events to affect each device and its sequence. This problem can also be solved by configuring NTP. NTP provides a time synchronization mechanism between routers, switches, and workstations. The time is synchronized, and the relevant time records on multiple network devices can be viewed together, which is more clear and facilitates the analysis of more complex faults and security events. In addition, the authentication, maintenance, management, backup systems and other applications in the government affairs network The time accuracy requirement is relatively high. For example, the switch and billing require the time accuracy to be 1s, and the network management system requires the time accuracy to be 500s.
There are three working modes of NTP service, namely client/server mode, broadcast mode and symmetric module.
In the client/server mode, the client sends NTP data packets periodically, visually checks the working status, event results, etc. according to the marks, and gives timely feedback.
System effect
After a period of operation, there are 24,589 general hidden danger data records in the database, of which 24,077 have been rectified, with a rectification rate of 97.91%; 145 major hidden danger data, of which 144 have been rectified, with a rectification rate of 99.3%. Accurate data on safety hazards have been obtained, and the results of the safety investigation are concentrated on the statistical data of production safety accidents, fires, and traffic accidents. The city's carrying capacity, emergency response capacity, safety prevention and control capacity, and disaster prevention and mitigation capacity have also been greatly improved. A large number of hidden dangers that were not found in the past have been discovered and solved, a large number of unresolved problems discovered in the past have been rectified, and some long-term historical problems have been properly handled. In order to effectively curb the occurrence of hidden dangers and accidents, a safe, stable and harmonious city has been created. The environment played a positive role in promoting.