host candidate:本機(jī)物理網(wǎng)卡或邏輯網(wǎng)卡地址和端口
srflx candidate:全稱Sever Reflexive Candidate,端發(fā)送Binding請(qǐng)求到STUN/TURN Server經(jīng)過NAT時(shí),NAT上分配的地址和端口
prflx candidate:全稱Peer Reflexive Candidate,端發(fā)送Binding請(qǐng)求到對(duì)等端經(jīng)過NAT時(shí),NAT上分配的地址和端口
relay candidate:全稱Relayed Candidate,端發(fā)送Allocate請(qǐng)求到TURN Server,由TURN server用于中繼的地址和端口