Shaping and Rewrite Rules JN0-650 Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   Which statement correctly describes how traffic shaping affects outbound traffic on a Junos device?

   • AIt re-marks packets to a lower priority to reduce their impact
   • BIt increases the interface speed to accommodate bursts
   • CIt drops all packets that exceed the configured rate
   • DIt buffers excess packets and transmits them at a controlled rate
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A company has a Junos router that receives traffic from a service provider. The provider expects all traffic to be marked with DSCP EF for VoIP. The router's internal classification uses forwarding classes and loss priorities. The engineer needs to ensure that VoIP traffic leaving the router toward the provider is marked with DSCP EF. What should be configured?

   • AA firewall filter that sets DSCP EF on all incoming VoIP traffic.
   • BA classifier that maps DSCP EF to the expedited-forwarding forwarding class.
   • CA rewrite rule that maps the expedited-forwarding forwarding class to DSCP EF.
   • DA policer that re-marks DSCP EF on the input interface.
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   What is the key difference between shaping and policing in Junos CoS?

   • AShaping is applied inbound, while policing is applied outbound
   • BShaping drops excess traffic, while policing buffers excess traffic
   • CShaping modifies packet headers, while policing does not
   • DShaping buffers excess traffic, while policing drops excess traffic
   Reveal Solution Discussion Select an answer first
5. 9foundation · easy

   Which packet header fields can be modified by a rewrite rule in Junos CoS?

   • ASource and destination IP addresses
   • BDSCP and 802.1p fields
   • CTCP and UDP port numbers
   • DMAC addresses
   Reveal Solution Discussion Select an answer first
6. 10application · medium

   A network engineer has created a rewrite rule named 'mark-ef' that maps the expedited-forwarding forwarding class to DSCP EF. The rule is defined globally but has not been applied to any interface. Traffic on the router's ge-0/0/1 interface is not being marked with DSCP EF. What is the most likely reason?

   • AThe classifier must be applied before the rewrite rule can work.
   • BThe DSCP EF value is not supported on the interface's physical media.
   • CThe router's forwarding table is not refreshing the rule.
   • DThe rewrite rule must be applied to the output side of the interface.
   Reveal Solution Discussion Select an answer first