2.1 End-To-End IP Traffic Flow in a Feature-Rich Environment 400-007 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   In a network using MPLS, how does the control plane influence the data plane?

   • AThe data plane builds the routing table for the control plane
   • BThe control plane directly forwards packets based on IP addresses
   • CThe control plane exchanges labels and builds the label forwarding table (LFIB) that the data plane uses to forward packets
   • DThe control plane is not involved in MPLS forwarding
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A network operations team is troubleshooting intermittent application performance issues. They notice that the issues correlate with the timing of their SNMP polling cycles. The network devices are configured with SNMPv2c and have large MIBs. What is the most likely reason that SNMP polling is affecting traffic flow?

   • ASNMP polling consumes CPU cycles on the network devices, which can delay control-plane processing and impact data-plane forwarding.
   • BSNMP polling changes the routing table on the devices, causing traffic to be rerouted.
   • CSNMP polling uses the data plane to send responses, which can congest the forwarding path.
   • DSNMP polling increases the size of the routing table, which slows down forwarding.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Which management plane operation can directly impact traffic flow by altering the forwarding behavior of a router?

   • ASending an SNMP trap to a network management system
   • BViewing the routing table with a show command
   • CApplying a new access control list (ACL) to an interface
   • DLogging system messages to a syslog server
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A network design includes a VRRP gateway for a subnet. The design team wants to ensure that traffic from the subnet to the Internet is not disrupted when the active VRRP router fails. Which additional design element is required to achieve this?

   • AConfigure the VRRP advertisement interval to a lower value to speed up failover.
   • BUse HSRP instead of VRRP for better failover performance.
   • CEnsure that the backup VRRP router has a default route to the Internet.
   • DConfigure VRRP preempt mode to ensure the backup router takes over immediately.
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   A network engineer applies a policy-based routing (PBR) policy on a router. How does this affect the forwarding path of matched traffic?

   • AIt overrides the routing table lookup and forces traffic to a specified next hop
   • BIt has no effect on the forwarding path, only on QoS
   • CIt only affects traffic that is destined to the router itself
   • DIt modifies the routing table to prefer a different path for all traffic
   Reveal Solution Discussion Select an answer first