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单选题
Which element occurs first during the first-packet-path processing?（）
A
destination NAT
B
forwarding lookup
C
route lookup
D
SCREEN options
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Which element occurs first during the first－packet－path processing?()
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Which two statements about the use of SCREEN options are correct? ()(Choose two.)
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Regarding fast path processing, when does the system perform the policy check?()
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Which two statements about the use of SCREEN options are correct？（）A、SCREEN options are deployed at the ingress and egress sides of a packet flow.B、Although SCREEN options are very useful， their use can result in more session creation.C、SCREEN options offer protection against various attacks at the ingress zone of a packet flow.D、SCREEN options examine traffic prior to policy processing， thereby resulting in fewer resouces used formalicious packet processing.
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Which two statements about JUNOS Software packet handling are correct？（）A、JUNOS Software applies service ALGs only for the first packet of a flow.B、JUNOS Software uses fast-path processing only for the first packet of a flow.C、JUNOS Software performs route and policy lookup only for the first packet of a flow.D、JUNOS Software applies SCREEN options for both first and consecutive packets of a flow.
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Which action occurs when the BGP route 20.1.0.0/16 is evaluated by the policy expression？（） [editpolicy-options] policy-statementmy-filter { term-first{ from{ route-filter192.168.0.0/16orlongeraccept； route-filter 192.168.1.0/24 exact accept； route-filter 192.168.2.0/24 exact； } then{ metric10； accept； } termsecond { then{ metric20； accept； }} policy-statementmain { termchange-attributes from{ policymy-filter； } thenaccept； } termdefault { thenreject； }} [editprotocols] bgp{ exportmain； }A、The route is not advertised into BGPB、The route is advertised into BGP with metric 10.C、The route is advertised into BGP with metric 20.D、The route is advertised into BGP with default metric.
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单选题Regarding fast path processing, when does the system perform the policy check?（）A
The policy is determined after the SCREEN options check.B
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The policy is determined after the zone check.D
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多选题Which two statements about Junos software packet handling are correct?（）(Choose two.)AThe Junos OS applies service ALGs only for the first packet of a flow.BThe Junos OS uses fast-path processing only for the first packet of a flow.CThe Junos OS performs policy lookup only for the first packet of a flow.DThe Junos OS applies SCREEN options for both first and consecutive packets of a flow.
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单选题Which ERX Edge Router component is responsible for all packet processing and packet forwarding？（）A
I/O adapterB
line moduleC
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多选题Which two statements about the use of SCREEN options are correct? （）(Choose two.)ASCREEN options offer protection against various attacksBSCREEN options are deployed prior to route and policy processing in first path packet processingCSCREEN options are deployed at the ingress and egress sides of a packet flowDSCREEN options, you must take special care to protect OSPF
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单选题Which action occurs when the BGP route 20.1.0.0/16 is evaluated by the policy expression？（） [editpolicy-options] policy-statementmy-filter { term-first{ from{ route-filter192.168.0.0/16orlongeraccept； route-filter 192.168.1.0/24 exact accept； route-filter 192.168.2.0/24 exact； } then{ metric10； accept； } termsecond { then{ metric20； accept； }} policy-statementmain { termchange-attributes from{ policymy-filter； } thenaccept； } termdefault { thenreject； }} [editprotocols] bgp{ exportmain； }A
The route is not advertised into BGPB
The route is advertised into BGP with metric 10.C
The route is advertised into BGP with metric 20.D
The route is advertised into BGP with default metric.
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单选题Which command displays the egress interfaces selected on the PFE for destination prefixes?（）A
show route forwarding-tableB
show route tableC
show route table extensiveD
show pfefwdd
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单选题Which tool allows a LAN client to determine which router should be the first hop to a particular remote destination, allowing simplified client configuration and processing without creating a single point of failure?（）A
Proxy ARPB
IRDPC
Dynamic Routing ProtocolD
VRRP
考题
多选题Which two statements about the use of SCREEN options are correct？（）ASCREEN options are deployed at the ingress and egress sides of a packet flow.BAlthough SCREEN options are very useful， their use can result in more session creation.CSCREEN options offer protection against various attacks at the ingress zone of a packet flow.DSCREEN options examine traffic prior to policy processing， thereby resulting in fewer resouces used formalicious packet processing.
考题
单选题Which element occurs first during the first-packet-path processing?（）A
destination NATB
forwarding lookupC
route lookupD
SCREEN options
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