單項(xiàng)選擇題

How is a loopback cleared on interface ge-0/0/0?（）

A.Issue the operational command clear interfaces ge-0/0/0 loopback local.
B.No command is necessary, the loopback times-out in 5 minutes.
C.Issue the configuration command clear interfaces ge-0/0/0 loopback, then commit.
D.Issue the configuration command delete interfaces ge-0/0/0 gigether-options loopback , then commit.

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多項(xiàng)選擇題

Which two loopback types are supported for serial interfaces on Juniper devices?（）

A.Local
B.Far End
C.Remote
D.Bidirectional

單項(xiàng)選擇題

When a local loopback is activated on a PPP serial link, what indicates that the local interface is good?（）

A.A ping to the local address succeeds.
B.A ping to the remote address succeeds.
C.A ping to the remote address received a 'TTL expired' message.
D.The interface shows a flag indicating that a loop is detected.