Ethereum E20
Publish: 2021-05-20 23:26:29
1. On November 22, 2014, the price of the special currency hovered between 2100 and 2250, never breaking 2300. A few days ago, there was a big rise in the price of bitcoin. The price of bitcoin once soared to 3000 yuan, but the price of all bitcoin began to fall and stabilized at about 2400 yuan. About 46% of users share in the futures platform of fire coin. Later, some people revealed the inside story of the fire coin network in Babbitt, and the price of bitcoin began to drop sharply to about 2100. Some people believe that the last price rise was e to the entry of hot money. When the hot money left, there was no one to protect it, so the price fell.
2. Ethernet refers to the baseband LAN specification created by Xerox company and jointly developed by Xerox, Intel and DEC company. It is the most common communication protocol standard used in current LAN. Ethernet uses CSMA / CD (carrier sense multiple access and conflict detection) technology, and runs on various types of cables at the rate of 10m / s. Of course, it has developed to 100M / s, 1000m / s, even 10000m / S & lt~~~ Ethernet is similar to IEEE802.3 series standard< In 1980, Dec, lntel and Xerox jointly developed Ethernet as a standard. Ethernet is the most widely used LAN, including standard Ethernet (10 Mbit / s), fast Ethernet (100 Mbit / s) and 10g (10 Gbit / s) Ethernet. CSMA / CD access control method is adopted, and they all conform to IEEE802.3
IEEE802.3 Standard
IEEE802.3 specifies the contents of connection, electrical signal and media access layer protocol including physical layer. Ethernet is the most popular LAN technology, which largely replaces other LAN standards. Such as token ring, FDDI and ARCNET. After the rapid development of 100M Ethernet at the end of last century, Gigabit Ethernet and even 10G Ethernet are constantly expanding their application scope under the promotion of international organizations and leading enterprises
the common 802.3 applications are:
10m: 10Base-T (copper UTP mode)
100m: 100base TX (copper UTP mode)
100base FX (optical fiber line)
1000m: 1000BASE-T (copper UTP mode)
so Ethernet is not a specific network, but a technical specification. That is to say, the whole network we use is called Ethernet. All the settings in it are Ethernet devices, including your network card, modem, router, etc~
IEEE802.3 Standard
IEEE802.3 specifies the contents of connection, electrical signal and media access layer protocol including physical layer. Ethernet is the most popular LAN technology, which largely replaces other LAN standards. Such as token ring, FDDI and ARCNET. After the rapid development of 100M Ethernet at the end of last century, Gigabit Ethernet and even 10G Ethernet are constantly expanding their application scope under the promotion of international organizations and leading enterprises
the common 802.3 applications are:
10m: 10Base-T (copper UTP mode)
100m: 100base TX (copper UTP mode)
100base FX (optical fiber line)
1000m: 1000BASE-T (copper UTP mode)
so Ethernet is not a specific network, but a technical specification. That is to say, the whole network we use is called Ethernet. All the settings in it are Ethernet devices, including your network card, modem, router, etc~
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