单选题Which attribute uniquely identifies the L2TP connection between the router and the L2TP network server?（）A Tunnel IDB Tunnel tagC Tunne ltypeD Tunnel medium
题目
单选题
Which attribute uniquely identifies the L2TP connection between the router and the L2TP network server?（）
A
Tunnel ID
B
Tunnel tag
C
Tunne ltype
D
Tunnel medium