eth info

①What do eth0 and eth1 do in linux configuration

It is a fiber-optic Ethernet interface card, which transmits signals according to the Ethernet communication protocol. It is generally connected to a fiber optic Ethernet switch through a fiber optic cable.

Eth0 and eth1 are used to distinguish network card names. They have the same meaning as Windows Local Area Connection 1 and Local Area Connection 2.

The subnet card here is not a practical network interface, but it can be flashed in the system as a collective interface, such as eth0:1, eth1:2.

(1) eth information extended reading:

Linux operating system embeds the TCP/IP protocol stack, and the protocol software has the function of routing and forwarding. Routing and forwarding relies on having multiple network cards installed in the host as routers.

When a network card receives a packet, the system kernel will query the routing table according to the destination IP address of the packet, and then send the packet to another network card according to the query result, and finally send the packet through the network card. Bag. The host process is the core function of the router.

The routing function is implemented by modifying the Linux kernel parameters. The sysctl command is used to configure and display kernel parameters in the /proc/sys directory.

For security reasons, the Linux kernel disables packet routing and forwarding by default. In Linux systems, there are two ways to enable forwarding, temporary and permanent.

② What do the three currencies BTC, ETH, and USDT mean on Bit Blue Whale

BTC is Bitcoin, ETH is Ethereum, and USDT is A token issued by the American Tether company for the equivalent of the US dollar

③ What is the ETH interface

ETH interface refers to the interface, which is currently the most widely used. A wide range of local area network communication methods, but also a protocol. The Ethernet interface is the port for the network data connection.

Each version of Ethernet has a limit on the maximum length of the cable (that is, the length without amplification), the signal within this range can propagate normally, and the signal beyond this range will not be able to propagate.

To allow for the construction of larger networks, repeaters can be used to connect multiple cables together. A repeater is a physical layer device that receives, amplifies and retransmits signals in both directions.

(3)Extended reading of eth information

Several common types of Ethernet interfaces.

1, SC fiber interface

SC fiber interface has been applied in the era of 100Base-TX Ethernet, so it was called 100Base-FX at that time (F is the abbreviation of fiber word fiber ), but at that time, because the performance was not better than twisted pair, but the cost was high, it was not popularized, and now the industry is vigorously promoting the gigabit network, and the SC fiber interface has received renewed attention.

2, RJ-45 interface

This interface is our most common network equipment interface, commonly known as “crystal head”, the professional term is RJ-45 connector, which belongs to dual Twisted Ethernet interface type. The RJ-45 plug can only be inserted in a fixed direction, and there is a plastic shrapnel that is stuck with the RJ-45 slot to prevent it from falling off.

3. FDDI interface

FDDI is one of the most mature LAN technologies with the highest transmission rate. It has the characteristics of timing token protocol and supports multiple topologies. The transmission medium is optical fiber. Fiber Distributed Data Interface (FDDI) is a set of protocols developed by the American National Standards Organization (ANSI) for sending digital signals over fiber optic cables.

Reference source: Network-Ethernet Interface

④ What is eth0?

eth0 is a fiber-optic Ethernet interface card. Scientific name Fiber Ethernet Adapter0. It follows the Ethernet communication protocol for signal transmission, and is generally connected to a fiber-optic Ethernet switch through a fiber-optic cable. According to the transmission rate, it can be divided into 100Mbps, 1Gbps, 10Gbps, according to the motherboard socket type, it can be divided into PCI, PCI-X, PCI-E (x1/x4/x8/x16), etc. ST et al.

(4) eth information extended reading:

The optical fiber Ethernet interface card is mainly used in the optical fiber Ethernet communication technology, which can provide users with fast Ethernet Computers on the network provide reliable optical fiber connections, which are suitable for places where the distance to access information points exceeds the access distance of Category 5 lines. It can completely replace the network structure that generally adopts RJ45 interface Ethernet external photoelectric converter, and provide users with reliable fiber-to-the-home and fiber-to-desktop solutions.

The optical fiber Ethernet interface card is plug and play compatible with IEEE 802.3z1000Base-SX/1000Base-LX Ethernet standard for 100Mbps or 1000Mbps Ethernet fiber access, and can work in full/half Duplex mode, full-duplex mode can provide 200Mbps or 2000Mbps bandwidth.

⑤ linux eth0 is determining ip information… how to solve it if it fails, please help me to see it.

You are dhcp to get the ip address

You are sure that your router is normal and the dhcp service is normal. Try again.

If it still doesn’t work, try setting it manually.

⑥ eth price���What does �� mean

Ether (ETH) is a digital token of Ethereum (Ethereum), regarded as “Bitcoin 2.0”, using a different blockchain technology from Bitcoin “Ethereum”, an open source public blockchain platform with smart contract achievements, is a resonance network composed of thousands of computers around the world. Developers need to pay ether (ETH) to support the operation of the application. Like other digital currencies, ether can be bought and sold on exchanges.

Reminder: ①The above information is for reference only and does not make any suggestions. This information does not constitute any investment advice, and investors should not use such information to replace their independent judgment or make decisions only based on such information, and do not constitute any trading operations.
②Investors should fully understand the investment risks, invest prudently, fully understand and clearly understand the risks contained in this product, participate in the transaction independently through their own judgment, and voluntarily assume the relevant risks.

Response time: 2020-08-13, please refer to the official website of Ping An Bank for the latest business changes.

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⑦ What does bitcoin ETH mean

Bitcoin is BTC, and ETH is Ethereum.
The concept of Bitcoin (Bitcoin) was originally proposed by Satoshi Nakamoto on November 1, 2008, and was officially born on January 3, 2009 [1]. The open source software designed and released according to the ideas of Satoshi Nakamoto and the P2P network built on it. Bitcoin is a virtual encrypted digital currency in the form of P2P. Peer-to-peer transmission means a decentralized payment system.
Ethereum (English) is an open source public blockchain platform with smart contract functions, which provides a decentralized Ethereum Virtual Machine (Ethereum Virtual Machine) through its dedicated cryptocurrency Ether (Ether, referred to as “ETH”). ) to handle peer-to-peer contracts.

Warm reminder:
1. The above information is for reference only and does not make any suggestions;
2. According to the “Announcement on Preventing Token Issuance Financing Risks”, there is no approval in my country digital currency trading platform. According to my country’s digital currency regulations, investors have the freedom to participate in digital currency transactions at their own risk.
Response time: 2021-02-01, please refer to the official website of Ping An Bank for the latest business changes.
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⑧ Get eth0 network card Packet information on port 80

[[email protected] ~]# tcpmp -i eth0 port 80
This book is very suitable for novices to learn Linux.

⑨ What network protocol is ETH

Local Area Network Protocol
Full name: ethnet Ethernet

Definition of Ethernet :

⑩ Running ifconfig command under Linux does not display eth0 information What’s the matter with only displaying the lo information

1. The eth0 setting is incorrect, causing it to fail to start normally
It is good to modify the eth0 configuration file
2. eth0 is closed.
ifconfig eth0 up
This should see it


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