Summary of knowledge about the network (2)

IP address: IP address (Internet Protocol Address) refers to Internet Protocol address, which is also translated as Internet Protocol address.
The IP address is a unified address format provided by the IP protocol. It assigns a logical address to each network and each host on the Internet to shield differences in physical addresses. Add link description
MAC address: MAC address (English: Media Access Control Address), literally translated as Media Access Control Address, also known as LAN Address, MAC Address, Ethernet Address or Physical Address (Physical Address), it is an address used to confirm the location of a network device. In the OSI model, the third network layer is responsible for IP addresses, and the second data link layer is responsible for MAC addresses. The MAC address is used to uniquely identify a network card in the network. If a device has one or more network cards, each network card needs and will have a unique MAC address to add link description
Ethernet: add link description