单项选择题
A.The dsl operating-mode auto command is required if the default mode has been changed
B.The ip mtu 1496 command must be applied on the dialer interface
C.The encapsulation ppp command is required
D.The ip mtu 1492 command must be applied on the dialer interface
单项选择题 As a network engineer， study the exhibit carefully. Router Net is unable to establish an ADSLconnection with its provider. Which action would correct this problem？（）
单项选择题 Router NetworkTut is configured as shown below： Given the above configuration， which statement is true？（）
多项选择题 Whichtwoencapsulationmethodsrequirethatan827ADSLrouterbeconfiguredwithaPPPusernameandCHAPpassword？（）