Which user authentication methods are available in JUNOS?（）

多项选择题Which two media types support asynchronous transfer mode?（）

A.T3
B.SONET
C.Gigabit-Ethernet
D.EIA/TIA-232 serial

单项选择题Which statement is true about configuring a back-to-back connection frame-relay on Juniper Routers?（）

A.Both DTE and DCE will send keep-alives by default so no special configuration is required.
B.The circuit is negotiated automatically so no special configuration is required.
C.All equipment is by default DTE, one side should be set to DCE
D.All equipment is by default DCE, one side should be set to DTE

单项选择题Which logical unit number must be configured on an interface using PPP encapsulation?（）

A.unit 0
B.unit 1
C.unit 100
D.unit 255

多项选择题Which two are valid configurations of an interface?（）

A.A
B.B
C.C
D.D

单项选择题The interface ge-0 2 3 is located in which flexible PIC concentrator slot?（）

A.0
B.2
C.3
D.4