Objective 1.14 Given a Scenario with a Specific Query Source IP Address and Various Pool and Wide IP Loading Balancing Methods and Topology Rules/regions Determine the Response That Will Be Given 302 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A company has a Wide IP with two pools: PoolA (US) and PoolB (Europe). A topology record matches source IPs in the 192.168.0.0/16 range to PoolB. A query arrives from source IP 192.168.1.1. The Wide IP method is 'Global Availability'. What pool is selected?

   • ANeither pool, because Global Availability requires a topology record
   • BPoolA, because Global Availability always picks the first available pool
   • CPoolB, because the topology record matches the source IP
   • DPoolA, because the source IP is in the US range
   Reveal Solution Discussion Select an answer first
2. 12expert · hard

   A Wide IP has two pools: PoolA and PoolB. A topology record matches 10.0.0.0/8 to PoolA. The Wide IP method is 'Round Robin'. A query arrives from source IP 10.1.1.1. PoolA is down. What is the response?

   • ANo response, because the topology record points to a down pool
   • BPoolB, because PoolA is down and the topology record is ignored
   • CPoolA, because topology takes precedence even if the pool is down
   • DPoolB, because the source IP is not in the topology range
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   A BIG-IP DNS administrator defines a topology record that matches source IP 192.0.2.0/24 to Pool A. A query arrives from source IP 192.0.2.10. What will BIG-IP DNS do with this query?

   • AIt will select Pool A because the source IP matches the topology record.
   • BIt will select the pool with the fewest connections because topology records only apply to virtual servers, not pools.
   • CIt will apply the Wide IP load balancing method to select a pool, ignoring the topology record.
   • DIt will return a 'no response' because topology records require an exact IP match, not a subnet.
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A Wide IP uses 'Round Robin' as the Wide IP method. PoolA has a pool load balancing method of 'Least Connections' and PoolB has 'Packet Rate'. A query arrives from a source IP that does not match any topology record. How does BIG-IP DNS select the pool?

   • AIt selects the pool with the lowest packet rate
   • BIt selects the pool with the fewest connections
   • CIt selects the pool with the highest availability
   • DIt alternates between PoolA and PoolB based on round robin, ignoring the pool methods
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A DNS query arrives at a BIG-IP DNS system via a forwarder. The original client IP is 203.0.113.5, but the forwarder's IP is 198.51.100.1. The BIG-IP DNS system is configured to use the forwarder's IP as the source. Which IP address is used for topology matching?

   • A198.51.100.1, because the system is configured to use the forwarder's IP
   • BNeither IP, because the system cannot determine the source
   • C203.0.113.5, because it is the original client IP
   • DBoth IPs, because the system uses both for matching
   Reveal Solution Discussion Select an answer first