network elements in Ethernet networking?路由器（Router）?RouterInterfacePortAroutercanhavemanydifferenttypesofinterfaceports.?aserialportwhichisaWANconnection.?theconsole（控制台）portconnectionwhichallowsdirectconnectiontotheroutertobeabletoconfigureit（exRS-232,Etherent,etc.）?anEthernetportwhichisaLANconnection.?AUI(AttachmentUnitInterface)connectorfortheEthernetconnection.2013-7-23Dr. ZhanqiXU,National Key Lab on ISN, Xidian University45network elements in Ethernet networking?路由器（Router）Connecting separate networks together2013-7-23Dr. ZhanqiXU,National Key Lab on ISN, Xidian University46network elements in Ethernet networking?网关（Gateway）实现两个不同的网络在第三层（或）及其以上层PDU的转换和/或交换（用户PDU、信令PDU）。2013-7-23Dr. ZhanqiXU,National Key Lab on ISN, Xidian University47七、以太组网－Virtual LAN?Vendor-specific solution and implementation strategies?Roughly equated to a broadcast domain?A group of end-stations, on multiple physical LAN segmentsthat are not constrained by their physical location and can communicate as if they were on a common LAN?VLAN Membership by MAC Address?Layer 2 VLAN: MAC Address VLAN1212354145121 12389234873743 23045834758445 25483573475843 12013-7-23Dr. ZhanqiXU,National Key Lab on ISN, Xidian University48
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