Load Balancing JN0-281 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   What is Equal-Cost Multipath (ECMP) in Junos?

   • AA technique to reduce the number of next hops in the routing table
   • BA feature that automatically creates a backup path for each route
   • CA method to load balance traffic across multiple next hops that have the same route preference and metric
   • DA routing protocol that selects the best path based on bandwidth
   Reveal Solution Discussion Select an answer first
2. 12application · easy

   A data center network uses a pair of Juniper routers in a spine-and-leaf topology. The leaf routers have two equal-cost uplinks to different spine routers. The network team wants to utilize both uplinks for traffic to the spine layer. What is the primary benefit of enabling load balancing in this scenario?

   • AIt provides redundancy by automatically failing over to the other link if one fails.
   • BIt increases the available bandwidth by using both uplinks simultaneously.
   • CIt reduces latency by always choosing the shortest path.
   • DIt simplifies routing configuration by using a single next hop.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Why is the protocol field included in the hash key for load balancing?

   • ATo ensure that all traffic uses the same path
   • BTo reduce the hash computation time
   • CTo differentiate between TCP and UDP flows
   • DTo prioritize certain protocols over others
   Reveal Solution Discussion Select an answer first
5. 14application · easy

   A network administrator is monitoring a Junos router that has per-flow load balancing enabled across two equal-cost paths. They notice that a single TCP flow is consistently using only one path, while other flows are distributed. What is the expected behavior?

   • AThis is a misconfiguration, and the router should be set to per-packet load balancing to use both paths for the flow.
   • BThis is normal because per-flow load balancing ensures that all packets of a flow use the same path to maintain packet ordering.
   • CThis is a sign of a routing loop, and the router should be rebooted.
   • DThis indicates a hash collision, and the router should be reconfigured to use per-packet load balancing.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A company is deploying a pair of Juniper routers in a data center to connect to two different ISPs. They have a BGP session with each ISP, and both ISPs advertise the same prefix (e.g., a public IP block) with the same local preference and AS path length. The company wants to use both ISP links for outbound traffic to the internet. What is the correct approach?

   • AConfigure 'multipath' under BGP and enable per-flow load balancing.
   • BUse a routing policy to set a higher local preference on one route to prefer that ISP.
   • CEnable per-packet load balancing on the router.
   • DConfigure the two ISP links as an aggregated Ethernet interface.
   Reveal Solution Discussion Select an answer first