URL: is a type of URI that identifies an Internet resource and specifies how to operate on or retrieve that resource. It can be identified either through the description of the primary access method or through its “location” on the network. Most URLs follow a standard format that consists of three parts: First part: scheme, … Read more
This article mainly introduces some improvements and new features of HTTP2 compared to HTTP1.1. 1. Shortcomings of HTTP1.1 The HTTP protocol adopts a “request-response” model. When using the normal mode, i.e., non-KeepAlive mode, a new connection must be established for each request/response between the client and server, and the connection is immediately closed after completion … Read more
Click the blue text above to follow us 1xx: Informational This class of status codes indicates a temporary response. The client should be prepared to receive one or more 1xx responses before receiving a regular response. HTTP Status Code Description 100 Continue. 101 Switching Protocols. 2xx: Success This class of status codes indicates that the … Read more
What Is USB? USB is a universal serial bus interface standard used to connect computer systems and external devices for data transmission and power supply. Advantages: High-Speed Transmission: The USB interface provides high-speed data transfer rates, suitable for quickly transferring large volumes of data. Hot Swappable: USB devices can be plugged and unplugged while the … Read more
1. What is MQTT? MQTT, short for Message Queuing Telemetry Transport, is a lightweight protocol designed specifically for devices with unstable networks and limited bandwidth. For example, in Northeast China, there are times when the signal is poor, making it difficult to access the internet on mobile phones. This is when MQTT comes into play. … Read more
To pass the time, I will provide a detailed explanation of the MQTT protocol code implementation I wrote earlier; the main content will analyze and implement the MQTT network communication protocol, specifically involving the processing of network data stream segmentation. Therefore, much of the content will involve specific code functionalities. If you are interested in … Read more
1. What Is MQTT Protocol The full name of MQTT protocol is Message Queuing Telemetry Transport, translated as Message Queue Telemetry Transport. It is a message protocol based on the publish-subscribe model under ISO standards, based on the TCP/IP protocol suite, designed to improve the performance of network device hardware and the network itself. MQTT … Read more
Background Having been in a long-distance relationship with my girlfriend for over a year, I suggested that we video chat every night to maintain our feelings. Since we started dating, we have managed to keep this up for over a year. Problem Sometimes during our chats, either my network or hers might be unstable, causing … Read more
This article is reprinted from WeChat public account: Linwan Village Chinchilla 1. Introduction TCP is a connection-oriented protocol. Before either party sends data in any direction, a connection must be established between the two parties. The state transition diagram for connection creation and termination is as follows: 2. Three-Way Handshake to Establish Connection The process … Read more
The establishment of a TCP connection can be simply referred to as a three-way handshake, while the termination of the connection can be called a four-way handshake. TCP is a connection-oriented protocol, so both parties need to establish a connection before sending data. This is completely different from the protocols discussed earlier. All the previous … Read more