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单选题
For which network anomaly does Junos provide a SCREEN?（）
A
a telnet to port 80
B
a TCP packet with the SYN and ACK flags set
C
an SNMP getnext request
D
an ICMP packet larger than 1024 bytes
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考题
Which parameters are valid SCREEN options for combating operating system probes?()
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Regarding fast path processing, when does the system perform the policy check?()
A. The policy is determined after the SCREEN options check.B. The policy is determined only during the first packet path, not during fast path.C. The policy is determined after the zone check.D. The policy is determined after the SYN TCP flag.
考题
For which network anomaly does Junos provide a SCREEN?()
A. a telnet to port 80B. a TCP packet with the SYN and ACK flags setC. an SNMP getnext requestD. an ICMP packet larger than 1024 bytes
考题
How does an IPv6 router deal with a packet that is larger than the outgoing interface MTU？（）A、It will fragment the packet at Layer 2.B、It will fragment the packet at Layer 3.C、It will drop the packet and send an ICMPv6 message "packet too big" back to the source.D、It will drop the packet.
考题
Which two statements are correct when you use the reject parameter as the next-hop value for a static route?（）A、The packet is dropped and the packet's source is marked with the no-readvertise parameter.B、The system sends the packet back to the source.C、The packet is dropped from the network.D、The system sends an ICMP message back to the source of the packet.
考题
A router receives an IPv6 packet which is 2000 bytes in length. The MTU of the outgoing interface is 1500 bytes. What action will the router take？（）A、forwards the packetB、fragments the packetC、drops the packet silentlyD、drops the packet and sends an ICMP message
考题
For which network anomaly does Junos provide a SCREEN?（）A、a telnet to port 80B、a TCP packet with the SYN and ACK flags setC、an SNMP getnext requestD、an ICMP packet larger than 1024 bytes
考题
A traditional router is better suited than a firewall device for which function？（）A、VPN establishmentB、packet-based forwardingC、stateful packet processingD、Network Address Translation
考题
Which two statements describe the difference between JUNOS Software for securityplatforms and a traditional router？（）A、JUNOS Software for security platforms supports NAT and PAT； a traditional router does not support NAT or PAT.B、JUNOS Software for security platforms does not forward traffic by default； a traditional router forwards traffic by default.C、JUNOS Software for security platforms uses session-based forwarding； a traditional router uses packet-based forwarding.D、JUNOS Software for security platforms performs route lookup for every packet； a traditional router performs route lookup only for the first packet.
考题
A router receives an IPv6 packet which is 2000 bytes in length. The MTU of the outgoing interface is 1500 bytes. Which action will the router take?（）A、Forward the packet.B、Fragment the packet.C、Drop the packet silently.D、Drop the packet and send an ICMPv6 message.
考题
给了两段documentation里的描述，问这个时候发哪种类型的ICMP包。 The interface on which the packet comes into the router is the same interface on which the packet gets routed out. The subnet or network of the source IP address is on the same subnet or network of the next-hop IP address of the routed packet.
考题
Which two statements are true about network voice traffic？ （Choose two.）（）A、 Voice traffic is affected more by link speed than FTP traffic is.B、 Voice traffic is affected more by packet delays than FTP traffic is.C、 Voice streams involve larger packet sizes than most TCP network traffic involves.D、 Voice traffic is more sensitive to packet loss than TCP network traffic is.E、 Voice traffic requires QOS mechanisms only in heavily loaded network segments.
考题
In JUNOS Software， which three packet elements can be inspected to determine if asession already exists？（）A、IP protocolB、IP time-to-liveC、source and destination IP addressD、source and destination MAC addressE、source and destination TCP/UDP port
考题
Which parameters must you select when configuring operating system probes SCREEN options?（）A、syn-fin, syn-flood, and tcp-no-fragB、syn-fin, port-scan, and tcp-no-flagC、syn-fin, fin-no-ack, and tcp-no-fragD、syn-fin, syn-ack-ack-proxy, and tcp-no-frag
考题
Which parameters are valid SCREEN options for combating operating system probes？（）A、syn-fin， syn-flood， and tcp-no-fragB、syn-fin， port-scan， and tcp-no-flagC、syn-fin， fin-no-ack， and tcp-no-fragD、syn-fin， syn-ack-ack-proxy， and tcp-no-frag
考题
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.
考题
In JUNOS software with enhanced services, which three packet elements are inspected to determineif a session already exists? （）(Choose three.)A、IP protocolB、IP time-to-liveC、source and destination IP addressD、source and destination MAC addressE、source and destination TCP/UDP port
考题
多选题In JUNOS Software， which three packet elements can be inspected to determine if asession already exists？（）AIP protocolBIP time-to-liveCsource and destination IP addressDsource and destination MAC addressEsource and destination TCP/UDP port
考题
多选题Which two statements are correct when you use the reject parameter as the next-hop value for a static route?（）AThe packet is dropped and the packet's source is marked with the no-readvertise parameter.BThe system sends the packet back to the source.CThe packet is dropped from the network.DThe system sends an ICMP message back to the source of the packet.
考题
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.
考题
单选题A router receives an IPv6 packet which is 2000 bytes in length. The MTU of the outgoing interface is 1500 bytes. What action will the router take？（）A
forwards the packetB
fragments the packetC
drops the packet silentlyD
drops the packet and sends an ICMP message
考题
多选题In JUNOS software with enhanced services, which three packet elements are inspected to determineif a session already exists? （）(Choose three.)AIP protocolBIP time-to-liveCsource and destination IP addressDsource and destination MAC addressEsource and destination TCP/UDP port
考题
问答题给了两段documentation里的描述，问这个时候发哪种类型的ICMP包。 The interface on which the packet comes into the router is the same interface on which the packet gets routed out. The subnet or network of the source IP address is on the same subnet or network of the next-hop IP address of the routed packet.
考题
单选题A router receives an IPv6 packet which is 2000 bytes in length. The MTU of the outgoing interface is 1500 bytes. Which action will the router take?（）A
Forward the packet.B
Fragment the packet.C
Drop the packet silently.D
Drop the packet and send an ICMPv6 message.
考题
单选题For which network anomaly does Junos provide a SCREEN?（）A
a telnet to port 80B
a TCP packet with the SYN and ACK flags setC
an SNMP getnext requestD
an ICMP packet larger than 1024 bytes
考题
单选题Which parameters are valid SCREEN options for combating operating system probes?（）A
syn-fin, syn-flood, and tcp-no-fragB
syn-fin, port-scan, and tcp-no-flagC
syn-fin, fin-no-ack, and tcp-no-fragD
syn-fin, syn-ack-ack-proxy, and tcp-no-frag
考题
单选题How does an IPv6 router deal with a packet that is larger than the outgoing interface MTU？（）A
It will fragment the packet at Layer 2.B
It will fragment the packet at Layer 3.C
It will drop the packet and send an ICMPv6 message packet too big back to the source.D
It will drop the packet.
考题
单选题Which parameters must you select when configuring operating system probes SCREEN options?（）A
syn-fin, syn-flood, and tcp-no-fragB
syn-fin, port-scan, and tcp-no-flagC
syn-fin, fin-no-ack, and tcp-no-fragD
syn-fin, syn-ack-ack-proxy, and tcp-no-frag
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