单选题Which type of traffic will cause Policed Discards errors on an interface on a JUNOS device?（）A Traffic that does not match any route in the forwarding table.B Traffic that exceeds the bandwidth of the interface.C Traffic of unsupported protocols on tha

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第2题：

Which three statements about bidirectional PIM are true？（）

• A、Traffic for a bidirectional group flows along the one shared tree and simultaneously utilizes multiple paths in a redundant network topology
• B、It does not require any traffic signaling in the protocol
• C、Membership to a bidirectional group is signaled using explicit Join messages
• D、It maintains source-specific forwarding state
• E、It reduces memory， bandwidth， and CPU requirements

第3题：

Which two of these are characteristics of an IPS device？（）

• A、 passively listens to network traffic
• B、 is an active device in the traffic path
• C、 has a permissive interface that is used to monitor networks
• D、 traffic arrives on one IPS interface and exits on another

第4题：

What does the interface subcommand switchport voice vlan 222 indicate？（）

• A、The port is configured for both data and voice traffic.
• B、The port is fully dedicated to forwarding voice traffic.
• C、The port will operate as an FXS telephony port.
• D、Voice traffic will be redirected to VLAN 222.

第5题：

Which statement describes transit traffic?（）

• A、Traffic addressed to the chassis that requires some form of special handling by the RE before it can be forwarded out an egress port.
• B、Traffic that enters an ingress port, is compared against the forwarding table, and is forwarded out an egress port.
• C、Any traffic that requires the generation of an ICMP message.
• D、Traffic that requires some form of special attention and does not pass through the device.

第6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.

第7题：

In JUNOS software， which command is used to configure TED support for OSPF？（）

• A、set protocols rsvp cspf-enable
• B、set protocols mpls cspf-enable
• C、set protocols rsvp traffic-engineering
• D、set protocols ospf traffic-engineering

第8题：

Which type of traffic will cause Policed Discards errors on an interface on a JUNOS device?（）

• A、Traffic that does not match any route in the forwarding table.
• B、Traffic that exceeds the bandwidth of the interface.
• C、Traffic of unsupported protocols on that interface.
• D、Traffic arriving on unknown virtual-circuits on that interface.

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第13题：

Which two statements are true about traffic shaping and traffic policing？（）

• A、both traffic shaping and traffic policing cause retransmissions of connection-oriented protocols such as TCP
• B、both traffic shaping and traffic policing support the marking and re-marking of traffic
• C、the effects of traffic shaping and traffic policing when configured on a router are applied to outgoing traffic
• D、traffic shaping queues excess traffic whereas traffic policing discards excess traffic
• E、traffic shaping allows the traffic to exceed the bit rate whereas traffic policing prevents the traffic from exceeding the bit rate

第14题：

When Cisco SDM is used to generate QoS policy， various QoS classes will be created and assigned a percentage of the interface bandwidth. Which three statements indicate the default bandwidth values that are assigned by SDM for outgoing traffic on a WAN interface？ （）

• A、 Voice traffic will be assigned 47% of the interface bandwidth.
• B、 Voice call signaling will be assigned 33% of the interface bandwidth.
• C、 Telnet， SSH， and other traffic that is generated to manage the router is assigned 5% of the interface bandwidth.
• D、 Best-effort traffic will be assigned 38% of the interface bandwidth.
• E、 Routing protocol traffic will be assigned 5% of the interface bandwidth.
• F、 Transactional traffic will be assigned 5% of the interface bandwidth.

第15题：

Which two statements about WRED are true？ （）

• A、WRED can selectively discard lower priority traffic when the interface becomes congested and can provide differentiated performance characteristics for different classes of service.
• B、Resource Reservation Protocol （RSVP） and WRED cannot be configured on the same interface.
• C、WRED will throttle back voice traffic only as a last resort.
• D、If the average queue length is greater than the minimum threshold but less than the maximum threshold， then based on the drop probability， WRED will either queue the packet or perform a random drop.
• E、WRED statistically drops more packets from low-bandwidth users than high-bandwidth users. Therefore， traffic sources that generate the least traffic are more likely to be slowed down than traffic sources that generate the most traffic.
• F、 WRED treats non-IP traffic as precedence 4.

第16题：

Assume the default-policy has not been configured.Given the configuration shown in the exhibit， which two statements about traffic from host_a inthe HR zone to host_b in the trust zone are true？（） [edit security policies from-zone HR to-zone trust] user@host# show policy one { match { source-address any； destination-address any； application [ junos-http junos-ftp ]； } then { permit； } } policy two { match { source-address host_a； destination-address host_b； application [ junos-http junos-smtp ]； } then { deny； } }

• A、DNS traffic is denied.
• B、HTTP traffic is denied.
• C、FTP traffic is permitted.
• D、SMTP traffic is permitted.

第17题：

Which statement describes the behavior of a security policy？（）

• A、The implicit default security policy permits all traffic.
• B、Traffic destined to the device itself always requires a security policy.
• C、Traffic destined to the device’s incoming interface does not require a security policy.
• D、The factory-default configuration permits all traffic from all interfaces.

第18题：

What are the steps for configuring stateful NBAR for dynamic protocols？（）

• A、Use the command ip nbar protocol-discovery to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interface.
• B、Use the command match protocol rtp to allow identification of real-time audio and video traffic. Use thecommand ip nbar port-map to extend the NBAR functionality for well-known protocols to new port numbers.
• C、Use the command match protocol to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interface.
• D、Configure a traffic class. Configure a traffic policy. Attach the traffic policy to an interface.
• E、Configure video streaming. Configure audio streaming. Attach the codec to an interface.

第19题：

Which two conditions will cause switch-to-wire to occur? （）(Choose two.)

• A、loss of power
• B、QoS congestion
• C、software failure occured
• D、WX device exceeded its license speed
• E、traffic does not match application definiton

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