Briefly describe the three technical types of NAT
I am Aixi, today I will briefly talk about the 3 types of NAT technologies
NAT is Network Address Translation, which is a network communication technology. Its main function is to match the internal IP address with the external IP address, and use a group of non-public IP addresses in the private network, so as to realize the interconnection between the internal network and the external network. NAT technology plays an important role in network communication. Below, Aixi will introduce you to the three types of NAT technology.
1. NAT technology based on static mapping
The NAT technology based on static mapping is also called static NAT technology. The implementation of this technology is to map a single internal IP address with a single external IP address one by one, so as to realize the interconnection between the internal network and the external network. This mapping is fixed and will not change as the network changes. Therefore, the entire mapping list is also fixed.
2. NAT technology based on dynamic mapping
The NAT technology based on dynamic mapping is also called dynamic NAT technology. The difference between this technology and the static NAT technology is that its mapping rules are dynamic and can be dynamically adjusted according to the needs of the internal network, thereby ensuring effective communication between the internal network and the external network.
3. NAT technology based on address rewriting
The NAT technology based on address rewriting is also called PAT (Port Address Translation) technology. This technology is based on the dynamic mapping technology and realizes the interconnection between the internal network and the external network through port number mapping. In this way, the internal private IP address can correspond to the external public IP address, and can be identified through different port numbers, so as to realize the function of network communication.
To sum up, different types of NAT technologies can realize the interconnection between the internal network and the external network according to different mapping methods, and play an important role in network communication.
What are the common cluster technologies
Cluster technology is a technology that combines multiple computers or services together to complete specific tasks according to certain rules. Common cluster technologies mainly include the following:
1. Load balancing: Responsible for allocating requests from clients to multiple service nodes, so that tasks can be performed on multiple computers at the same time, thereby improving the processing efficiency and stability of the entire cluster.
2. Data sharing: Provide an efficient and reliable data sharing mechanism, so that data can be shared and accessed on multiple computers, thereby solving the data consistency and reliability problems in distributed computing.
3. High availability: through backup, redundancy and automatic failover, etc., to ensure the high availability and fault tolerance of cluster services, and improve the stability and reliability of the entire cluster.
4. Data processing: including distributed computing, parallel processing, graph computing and other technologies, which can split large-scale data processing tasks into multiple sub-tasks for parallel processing, speed up data processing, and improve the efficiency of the entire cluster.
5. Big data storage: Provide efficient and reliable distributed storage technology, which can store data on multiple computers, realize distributed storage and access of data, and meet the needs of big data storage.
The above are common cluster technologies. Different cluster technologies can be selected and matched according to different needs and scenarios to achieve more efficient and reliable cluster computing.
That's all for today's sharing, I'm Essie, see you next time