1. Architecture The TCP/IP protocol suite is a four-layer protocol system. Figure 1 TCP/IP Architecture Data Link Layer: Implements the network driver for the network interface card, handling the transmission of data over physical media (Ethernet, Token Ring). The network driver abstracts the electrical characteristics of different physical networks. The data link layer uses ARP … Read more
Static IP Routing A Simple Routing Table Routing is one of the most important functions at the IP layer. The previous sections have briefly discussed how routers select routes based on the IP addresses of IP packets. We will not repeat that here. First, let’s take a look at a simple system routing table. Destination … Read more
Introduction This article covers the basics of the TCP/IP protocol, focusing on the content, functions of the TCP/IP protocol suite, and foundational knowledge related to the three common network protocols: TCP, UDP, and IP. Content The TCP/IP protocol suite is developed from the OSI seven-layer model. The existence of the OSI reference model has the … Read more
Click on the “Five-Minute Algorithm Learning” above to select the “Star” public account Heavyweight content delivered first-hand From: Juejin, Author: Ruheng Link: https://juejin.im/post/6844903490595061767 1. TCP/IP Model The TCP/IP protocol model (Transmission Control Protocol/Internet Protocol) includes a series of network protocols that form the foundation of the internet and is the core protocol of the Internet. … Read more
Click the “Five-Minute Algorithm Learning” above and select the “Star” public account Heavyweight content delivered first time When it comes to the protocols we encounter most in computer networks, we cannot ignore the TCP/IP protocol, which is also the most famous protocol on the Internet. Let’s talk about the TCP/IP protocol together. Historical Background of … Read more
What Are TCP Segmentation and IP Fragmentation We know that a network is like a pipe, and pipes can have different diameters. When a data packet wants to travel from one end of the pipe to the other, it must pass through this pipe. (Obvious, right?) However, the size of data packets can be varied, … Read more
Open the RT809H operation interface, click [Smart Identification], select TYPE as EMMC, and Volt as 3.3V. Click settings, check EMMC Area in front of User/boot1/boot2/EXT_CSD, select VCCQ as 3.3V, then click write, choose the backup file, and select any one to start writing. RT809H Programmer Taobao Link: https://item.taobao.com/item.htm?id=551805435687 eMMC Programming Socket Taobao Link: https://item.taobao.com/item.htm?id=560967621649 Copy … Read more
Zuosi Automotive Research has released the 2023 Automotive Power Management Chip Industry Research Report. Automotive power management chips (PMIC) are widely used in scenarios such as automotive intelligent cockpits, autonomous driving, body electronics, instrument and entertainment systems, lighting systems, and battery management systems (BMS). By product, PMIC can be mainly divided into AC/DC, DC/DC, LDO, … Read more
In the era of mobile internet, devices such as smartphones, Bluetooth headsets, and smartwatches have become essential in people’s daily work and life. However, these smart products often face issues of loss or theft, and their high prices can lead to significant financial losses for the owners. Moreover, the loss of important data stored within … Read more
1. What is PMIC Power Management Integrated Circuit (PMIC) is the Chinese term for 电源管理集成电路, which is characterized by high integration, encapsulating traditional multi-output power supplies into a single chip, making multi-power applications more efficient and compact. PMIC is an indispensable key component in today’s electronic devices, providing power for various devices from mobile phones … Read more