On a Juniper Router， where is the JUNOS software located？（）

单项选择题IfthePFEdoesnothavearoutetothedestinationaddressofapacket，whichactionwillbetaken？（）

A.The PFE floods the packet out of all interfaces.
B.The PFE drops the packet and sends a destination unreachable notification back to source device.
C.The PFE forwards the packet to the routing engine for further processing.
D.The PFE queues the packet and sends a request for a layer 3 lookup to the routing engine.

单项选择题Inwhichmodeareusersallowedtoconfigurethedevice，includinginterfaces，protocols，useraccess，andsystemhardwareproperties？（）

A.priviledged mode
B.configuration mode
C.monitoring mode
D.operational mode

单项选择题Whatrepresentsthedecimalequivalenceof11000000101010001010110011110001？（）

A.192.168.184.201
B.192.168.172.241
C.192.170.172.237
D.192.170.184.221

单项选择题WhichstatementiscorrectaboutthevalidateoptionwhenupgradingJUNOSsoftware？（）

A.It will check the MD5 checksum of the install package.
B.It will check if the device meets the memory requirements for the install package.
C.It will check the compatibility of the configuration with the install package.
D.It will check if the device meets the storage requirement for the install package.