[单项选择题] Which parameter is usedby GPRST unnelling protocol between GSNs to identify a PDP context?()
A.NSAPI
B.TLLI
C.SAPI
D.TEID
正确答案:D

[单项选择题] Which parameter is usedby GPRST unnelling protocol between GSNs to identify a PDP context?()
A.NSAPI
B.TLLI
C.SAPI
D.TEID
正确答案:D