Tus nqi ntawm cov nyiaj 1) Kev sib xyaw ua ke: paub txog cov khoom siv hauv chav computer, ua kom tiav kev sib tw, tag nrho kev sib haum xeeb, thiab tus nqi siab.2) Cov khoom lag luam: Nws tuaj yeem ua raws li daim ntawv jack thiab lub zog tsis muaj zog nrog kev muag khoom xws li servers, routers, keyboards, thiab lwm yam, thiab ...
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