本部分要点WHATISTCP/IP?WHATISTCP/IP?WHATISTCP/IP?WHATISTCP/IP?Thefollowinglistpointsoutsomeofthemostcommonones:Thefollowinglistpointsoutsomeofthemostcommonones:TCP/IPCOMPONENTSIPaddress:NetworkSolutions:DHCPServerSubnetmaskThesecondcomponentofIPaddressingisthesubnetmask.DefaultgatewayThelastcomponentofIPaddressingisthedefaultgateway.Adefaultgateway,orrouter,istheIPaddressoftherouterthatleadsoutofthesubnet.Youcanthinkofthedefaultgatewayasthe“roadthatleadsout.”举例:本节