The crab card refers to the Realtek network card. Its icon looks like a crab, so it is called the crab card network card. A network card is a piece of computer hardware designed to allow computers to communicate on a computer network, allowing users to connect to each other via cables or wirelessly. Realtek uses the crab as its corporate logo and hopes that it can imitate the symbolism of the crab's tenacity, fearlessness, and courage to challenge in nature.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
The crab card network card is a Realtek network card. Its icon looks like a crab, so it is called a crab card network card.
A network card is a piece of computer hardware designed to allow computers to communicate on a computer network. It allows users to connect to each other via cable or wirelessly.
Each network card has a unique 48-bit serial number called a MAC address, which is written in a ROM on the card. Every computer on the network must have a unique MAC address. No two network cards produced have the same address.
No two network cards produced have the same address. This is because the Institute of Electrical and Electronics Engineers (IEEE) is responsible for assigning unique MAC addresses to network interface controller (network card) vendors.
The main functions of the network card
1. Data encapsulation and decapsulation
Put the previous data when sending The data passed by the Ethernet layer is added with a header and a trailer to become an Ethernet frame. When receiving, the header and tail of the Ethernet frame are stripped off, and then sent to the upper layer
2. Link management
Mainly through CSMA/CD (Carrier Sense Multiple Access with Collision Detection , Carrier Sense Multiple Access with Collision Detection) protocol to implement
3. Data encoding and decoding
is Manchester encoding and decoding. Among them, Manchester code, also known as digital bidirectional code and phase encoding (PE), is one of the commonly used binary code line encoding methods. It is used by the physical layer to encode the clock and data of a synchronous bit stream. In communications technology, a code used to represent the combination of data and timing signals in the bit stream to be sent. Commonly used in Ethernet communications, train bus control, industrial buses and other fields.
Extended information:
Realtek (yù) Semiconductor was founded in 1987 and is located in the Hsinchu Science Park in Taiwan's "Silicon Valley". The crab is the company's logo. I hope that I can imitate the symbolism of the crab in nature with its tenacious vitality, fearlessness, and courage to challenge. This kind of competition that is not afraid of hardships and dangers and faces excellence is the best portrayal of our self-improvement and becoming more courageous with each setback. We are just like a vibrant crab in the technological torrent, thriving and growing.
Realtek positions itself with the R&D and design of integrated circuit products. It has successfully developed application integrated circuits in a variety of fields. Its product lines span communication networks, computer peripherals, multimedia and other technologies, and are closely related to the world's advanced industries. The mainstream goes hand in hand.
Research and development direction and vision:
Adhere to providing customers with overall solutions based on a system concept, including software and hardware products and design services.
Strengthen the in-depth development of core technologies, including Embedded Processors (such as reduced instruction set microprocessors RISC CPU, digital signal processor DSP, etc.), Embedded Memories, analog and digital mixed mode (Mixed-Mode) integrated circuit design, Radio frequency (RF) chip design, system design and advanced process technology, etc.
Starting from the application side and gradually integrating image/sound/communication system on a chip (System on a Chip).
Develop high-speed/broadband/wireless transmission network products, and use this as a platform to develop high-speed, high-resolution multimedia products, provide a full range of network and multimedia solutions, and build ubiquitous audio-visual information, sound and light Convenient digital life for entertainment.
For more related knowledge, please visit the FAQ column!
The above is the detailed content of What kind of network card is Crab card?. For more information, please follow other related articles on the PHP Chinese website!