Domain Name (Domain Name) is the naσ ≠∞me of a computer or computΩ&₽er group on the Internet composed o€δ∑≤f a series of dot-separ∑Ω"ated names. It is used to identi"♣ §fy the electronic location of the co'φ→λmputer during data transmission→>↕¥ (sometimes also refers to the geogr¥§'aphical location, geogr∏​>→aphical Domain name refers to a<& local area with administrative au>•tonomy). A domain name is an I•ε✔P address with a "mask". The•★δ purpose of a domain ÷≠®γname is to facilitate the≠↕✘® memory and communication of a gλ£≈∑roup of server addresses (websitΩ£∑✔e, email, FTP, etc.).

The network communicates and connects bπ÷ ased on the TCP/IP protocol. E♠φ•©ach host has a unique I¶‍P address with a unique identifierφ£ to distinguish thousandsγ‌♦ of users and computers on the&∑™ network. The network uses a unique an₩←€®d universal address f ‌ ormat when distinguishing all connectεαed networks and hosts, that is, e₽₩ach computer and server coσ≤nnected to the network iγ​¥s assigned a unique address. In ordeδ≈±πr to ensure the uniqueness of the IP aα∞δddress of each comput λer on the network, the user mu₩ st apply for registration with a specif‌‌<ic institution and assign an IP'' address. The address sc&←heme in the network is divided into ↔‍≥↕two sets: IP address system aφ ♦nd domain name address system. Th¥™πe two sets of addres> ≈‌s systems actually have a one-to-on↓β★e correspondence. The IΩ ≤∞P address is represent×∏ed by a binary number. Each IP÷☆ address is 32 bits long and consists¥‌ of 4 digits less than 256, with​™‍ dots between the di§πgits, for example, 100♦•→.10.0.1 represents an IP address. Be‌↑♥&cause the IP address is a dig≤™ital ID, it is difficult to remem≈♥ber and write when it is used. →¶Therefore, a symbolic addres&¥s scheme has been developed base×σd on the IP address γ>↔to replace the digital IP add★ ↕ress. Each symbolized address co¶€rresponds to a specific IP address, Ω™×so that resources on ​∏∞the network are much easier t∑♥←o access. This character addr  ess corresponding to th™£÷÷e digital IP address on ←ε✘→the network is called a dom'₹÷≈ain name.

Domain level and type