user@host> debug interface interface-name
user@host> monitor usage interface-name
user@host> monitor interface interface-name
user@host> traceoptions interface interface-name
单选题 Which statement is true about the internal link between the Routing Engine and the Packet-Forwarding Engine？（）
It is only used for exception traffic.
It is an FE link called fxp2.
It is rate-limited to avoid DDOS attacks.
It is only used to send the forwarding-table from the Routing Engine to the Packet-Forwarding Engine.
多选题 Which two statements about login classes correctly define their usage within the JUNOS software?（）
A different login class must be configured for each user.
Individual commands can be explicitly allowed or denied.
A user must be assigned to one of the default login classes.
Each login class is associated with one or more permissions flags.
show interfaces queue ge-0/0/0
show statistics queue detail
show interfaces ge-0/0/0 statistics extensive
monitor interface ge-0/0/0 queue
单选题 A router has been configured with the settings shown below:  user@host# show system authentication-order authentication-order [ radius tacplus ]; The router also has a local database that contains the user lab with password lab123. What would happen if both the RADIUS and the TACACS servers are not accessible?（）
The user lab will not be able to login.
The user lab will be authenticated against the local database and will be able to login.
The user lab will receive an error message indicating the router is unable to authenticate due to the authentication servers not responding.
The user will be able to login only if tries to login as the root user.
单选题 Which command configures an address of 192.168.1.1 with a mask of 255.255.255.0 on interface ge-0/0/0?（）
set ip interface ge-0/0/0 address 192.168.1.1 255.255.255.0
set ip interface ge-0/0/0 address 192.168.1.1/24
set interface ge-0/0/0 ip4 address 192.168.1.1 mask 255.255.255.0
set interfaces ge-0/0/0 unit 0 family inet address 192.168.1.1/24
单选题 What is correct regarding the configuration shown below?（） （1）static route 0.0.0.0/0 （2）qualified-next-hop 172.30.25.1 preference 7 （3）next-hop 172.30.25.5
The next-hop 172.30.25.1 is selected because the address has the lowest value.
The next-hop 172.30.25.1 is selected because it is listed first.
The next-hop 172.30.25.1 is selected because it is the lowest protocol preference.
The next-hop 172.30.25.5 is selected because it is the lowest protocol preference.
单选题 When troubleshooting ATM, which command would allow you to test reachability from one side of an ATM cloud to the other?（）
ping atm vci 0.100 interface at-0/1/0 end-to-end
ping atm vci 0.100 interface at-0/1/0 circuit
ping atm vci 0.100 interface at-0/1/0 far-end
ping atm vci 0.100 interface at-0/1/0 final-hop
.24 through .48
.24 through .32
.25 through .30
.35 through .31
The likelihood of collisions occurring increases when a switch is used.
The likelihood of collisions occurring increases when a hub is used.
If a hub is used, the collision domain is limited to each device and the hub.
If a switch is used, the collision domain is limited to each device and the switch.