I. What are the core technologies of Ethernet?
The core technology of Ethernet is the CSMA/CD method.
The core technology of Ethernet is the random contention-based media access method.
Ethernet is a computer local area network (LAN) technology. The IEEE 802.3 standard, organized by the IEEE, defines the technical standard for Ethernet, specifying the physical layer wiring, electronic signals, and media access layer protocols. Ethernet is the most widely used LAN technology, replacing other LAN technologies such as Token Ring, FDDI, and ARCNET.
What is Ethernet protocol?
The most commonly used Ethernet communication protocol today is TCP/IP. Compared to the Open Internet Model (ISO), TCP/IP adopts a more open approach. It has been recognized by the U.S. Department of Defense and is widely used in practical engineering. TCP/IP can be used on a wide variety of channels and underlying protocols (such as TCP, X.25, and RS-232 serial interfaces). More precisely, TCP/IP is a protocol suite that includes TCP, IP, UDP (User Datagram Protocol), ICMP (Internet Control Message Protocol), and several other protocols.
Ethernet is one of the most common computer networks in the real world. There are two types of Ethernet: classic Ethernet and switched Ethernet, which uses a device called a switch to connect different computers. Classic Ethernet is the original form of Ethernet, with speeds ranging from 3 to 10 Mbps; while switched Ethernet is the widely used type of Ethernet, capable of operating at high speeds of 100, 1000, and 10000 Mbps, presented as Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet, respectively.
II. What are the differences between Ethernet and broadband?
Ethernet connection: Local Area Connection only appeared in Microsoft Windows XP/7 operating systems. In Windows 8/8.1, Local Area Connection was renamed "Ethernet". Both "Local Area Connection" and "Ethernet" actually refer to the physical network card (network adapter) on the computer.
Ethernet is the most widely used communication protocol standard in current local area networks (LANs), established in the early 1970s. Ethernet is a common LAN standard with a transmission rate of 10 Mbps. In Ethernet, all computers are connected to a single coaxial cable, using Carrier Inductively Coupled Multiple Access with Collision Detection (CSMA/CD) and a contention-based, bus topology. Essentially, Ethernet consists of a shared transmission medium, such as twisted-pair or coaxial cable, and multi-port hubs, bridges, or switches. In star or bus topologies, hubs/switches/bridges connect computers, printers, and workstations to each other via cables.
Broadband, also known as "wideband network" or simply "broadband," refers to internet access. We know that although dial-up internet speeds have increased from 14.4Kbps to 56Kbps in just a few years, 56Kbps is generally the limit for most modems due to limitations in telephone line quality. To achieve faster internet speeds, alternative methods are necessary, leading to the emergence of various broadband access services in recent years. So, what is broadband? There isn't a strict definition. Generally, the current upper limit of dial-up internet speed, 56Kbps, is used as a dividing line. Access speeds of 56Kbps and below are called "narrowband," while those above are classified as "broadband." Broadband also refers to access technology that allows multiple transmissions over the same transmission medium using different channels, with transmission speeds exceeding 1.5 Mbps. Compared to traditional internet access technologies, the biggest advantage of broadband access technology is the significantly expanded bandwidth, typically 30 times that of ordinary dial-up internet.
Broadband access has always been sought after by the entire internet industry and the vast majority of netizens. Currently, the broadband access solutions available to the public include ADSL technology based on existing telephone lines, cable modem technology based on existing cable TV lines, FTTB broadband technology that involves laying new fiber optic cables, broadband satellite technology, and LMDS (Local Multi-Point Distribution System) technology. At present, ADSL and cable modem are the most feasible options, as they do not require rewiring, and the costs of access equipment and usage are relatively low. Broadband access is now similar to Ethernet access. In terms of stability alone, it is much stronger than ADSL, which is asymmetric digital subscriber line; although the access is via a dynamic public IP address, it is still limited by the speed of the operator's public network exit.
The "broadband connection" often seen on Windows computers is essentially a virtual connection line. After installing the Windows operating system, users need to manually create the "broadband connection" icon.
Ethernet is the most widely used communication protocol standard in current local area networks (LANs). This standard defines the cable types and signal processing methods used in LANs. Ethernet transmits packets between interconnected devices at speeds of 10-100 Mbps. Ethernet can operate in two modes: half-duplex and full-duplex.
Broadband doesn't have a strict definition. Generally, the current upper limit of dial-up internet speed, 56Kbps, is used as a dividing line. Access speeds of 56Kbps and below are called "narrowband," while access speeds above that are classified as "broadband." If a definition is necessary, it refers to the bandwidth required for various media to be transmitted over the network in a way that is perceptible to human senses. Therefore, it is a dynamic and evolving concept. Currently, for ordinary home users, broadband refers to network infrastructure and services with transmission speeds exceeding 1Mbps (1Mbps = 1024KB) that enable 24/7 connectivity without dial-up access.
