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 4)

Questions 16–20

1. 16application · medium

   A DNS query arrives at a BIG-IP DNS system directly from a client with IP 198.51.100.50. The system is configured to use the query source IP for topology matching. What IP address is used for topology matching?

   • AThe IP of the Wide IP virtual server
   • BThe IP of the DNS resolver
   • CThe IP of the BIG-IP DNS system itself
   • D198.51.100.50, because it is the direct source of the query
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   A Wide IP has a topology record that maps source IP 203.0.113.0/24 to Pool A. The Wide IP load balancing method is round robin. A query arrives from source IP 203.0.113.5. Which pool will BIG-IP DNS select?

   • APool A, because topology records are evaluated before load balancing methods.
   • BPool A only if round robin also selects Pool A.
   • CNo pool, because topology records and load balancing methods conflict.
   • DThe pool selected by round robin, because load balancing methods override topology records.
   Reveal Solution Discussion Select an answer first
4. 18expert · hard

   A Wide IP has two pools: PoolA (US) and PoolB (Europe). A topology record matches 10.0.0.0/8 to PoolA. Another topology record matches 10.0.0.0/16 to PoolB. A query arrives from source IP 10.0.1.1. Which pool is selected?

   • APoolA, because the /8 record is configured first
   • BPoolB, because the more specific topology record is evaluated first
   • CPoolA, because the more specific topology record is evaluated first
   • DEither pool, because the records overlap
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   A BIG-IP DNS receives a query directly from a client workstation with IP address 192.0.2.50. The client has configured its DNS settings to use the BIG-IP DNS as its DNS server. What source IP address will BIG-IP DNS use for topology and load balancing decisions?

   • AThe self IP address of the BIG-IP DNS that received the query
   • BAn IP address from the client's subnet assigned by DHCP
   • C192.0.2.50
   • DThe IP address of the client's default gateway
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A Wide IP uses 'Round Robin' as the load balancing method. There are three pools: PoolA, PoolB, and PoolC. A query arrives from source IP 192.0.2.1. The last query was answered by PoolA. What pool is selected for this query?

   • APoolB, because round robin cycles to the next pool
   • BAny pool, because round robin is random
   • CPoolC, because it is the last pool in the list
   • DPoolA, because the source IP is the same
   Reveal Solution Discussion Select an answer first