N 国家重点实到 Name Definition Main features It is a long-distance network the networking Wide connecting computer area is a nation, area communication of LANs and/or across several network( MANs in different a areas.It continents, WAN# usually spans a large physical covering from 广域网) range,covering 1 from tens of hundreds to kilometers to thousands of thousands kilometers. t can connect kilometers. multiple regions, cities and countries, or across several continents via sea optical fibers and provide long-distance communication, forming an international long-distance network. 172020/4/23 Dr. Zhanqi XU, National Key Lab on ISN, Xidian University 17 Name Definition Main features Wide area network( WAN# 广域网) It is a long-distance network connecting computer communication of LANs and/or MANs in different areas. It usually spans a large physical range, covering from tens of kilometers to thousands of kilometers. It can connect multiple regions, cities and countries, or across several continents via sea optical fibers ,and provide long-distance communication, forming an international long-distance network. the networking area is a nation, across several continents, covering from hundreds to thousands kilometers