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

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.

单项选择题Which command configures an address of 192.168.1.1 with a mask of 255.255.255.0 on interface ge-0 0 0?（）

A.set ip interface ge-0/0/0 address 192.168.1.1 255.255.255.0
B.set ip interface ge-0/0/0 address 192.168.1.1/24
C.set interface ge-0/0/0 ip4 address 192.168.1.1 mask 255.255.255.0
D.set interfaces ge-0/0/0 unit 0 family inet address 192.168.1.1/24

单项选择题Which protocol family is required prior to assigning an IP address to an interface?（）

A.family ip
B.family ip6
C.family inet
D.family inet4

单项选择题Which command will save the current active configuration as the rescue configuration?（）

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