多项选择题

Which two statements are correct regarding units in JUNOS?（）

A.Units in JUNOS are always required for any interface configured with logical addresses such as IP and IPv6.
B.Units in JUNOS are only required when you are configuring sub-interfaces for inter-VLAN routing.
C.Unit numbers must match the DLCI or VCI numbers configured on the interface.
D.Unit 0 is the only value allowed on interfaces running HDLC, PPP, or for Ethernet interfaces not doing VLAN-tagging.

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单项选择题

Which option is correct to configure the maximum transmit packet size of a Fast Ethernet interface?（）

A.set interfaces fe-0/0/0 unit 0 ethernet-options mtu 1200
B.set interfaces fe-0/0/0 mtu 1200
C.set interfaces fe-0/0/0 unit 0 mtu 1200
D.set interfaces fe-0/0/0.0 mtu 1200

单项选择题

After issuing the show interfaces terse command, you notice that the status of one interface is "up down". What does this indicate?"（）

A.Layer 1 on the interface is up but Layer 2 is down.
B.Layer 2 on the interface is up but Layer 3 has not been configured.
C.The interface is administratively up but the link status is down.
D.The interface is up but has been administratively turned off.

单项选择题

Which statement is correct about logical units on Juniper Router interfaces?（）

A.Logical units are used only when a Layer 2 identifier is present such as a VLAN
B.A logical unit of 0 is required when using a frame-relay DLCI
C.A logical unit is always required
D.Logical units are not required unless ATM or 802.1Q VLAN tagging is configured.