单选题
Which command configures the router to send SNMP link-related notifications such as up-down transitions and line status changes?（）
set snmp trap-group my-trap-group link-status
set snmp trap-group my-trap-group categories link
set snmp log link-status
set snmp trap link-status
多选题
Which two statements are true regarding an Ethernet collision domain?（）
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.
单选题
What represents the decimal equivalence of 11000000 10101000 10101100 11110001? （）
192.168.184.201
192.168.172.241
192.170.172.237
192.170.184.221
单选题
Which command would you type to see a concise display of which interfaces are up and which are down?（）
show interfaces brief
show interfaces status
show ip interface brief
show interfaces terse
单选题
If the PFE does not have a route to the destination address of a packet， which action will be taken？（）
The PFE floods the packet out of all interfaces.
The PFE drops the packet and sends a destination unreachable notification back to source device.
The PFE forwards the packet to the routing engine for further processing.
The PFE queues the packet and sends a request for a layer 3 lookup to the routing engine.
多选题
Which three SONET network elements are used for troubleshooting?（）
line
path
circuit
section
segment
单选题
Which logical unit number must be configured on an interface using PPP encapsulation?（）
unit 0
unit 1
unit 100
unit 255
单选题
What information does the help topic command provide?（）
router’s version and serial number to help open a case with JTAC
software documentation describing features and configuration tasks within JUNOS
a brief description of commands and their default values
a verification of the current configuration on the router
单选题
Which CLI command displays error statistics for an interface in real-time?（）
monitor traffic
show interfaces
monitor interface
show interfaces extensive
单选题
What is used to view status messages sent to a file named "test" as they are sent?（）
monitor start test
show log test
view log test
show test realtime
