Objective 1.12 Explain How Zone Transfers Work [multi Master, Master/slave, DNSExpress, Incremental/full, Updates (notify/expire)] 302 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   In a multi-master DNS configuration, what is a key implication for zone consistency?

   • AZone transfers are disabled because all servers already have the same data
   • BOnly one master is authoritative; the others are backups that never serve queries
   • CAll masters must be updated simultaneously to avoid serving conflicting data
   • DSlaves automatically merge changes from all masters without conflict
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   What must a master server maintain to support IXFR?

   • AA backup of the zone on a separate server
   • BA list of all client queries for auditing
   • CAn encrypted connection to every slave
   • DA history of zone versions and the changes between them
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A zone has a moderate number of records, and the administrator wants to reduce the bandwidth used by zone transfers. The slave already has a recent copy of the zone. Which configuration will achieve this?

   • AIncrease the SOA refresh timer
   • BEnable IXFR on the master and slave
   • CEnable DNSExpress on the master only
   • DDisable NOTIFY on the master
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   An administrator is troubleshooting why a slave server is not receiving zone updates. The master is sending NOTIFY messages, but the slave is not responding. The slave's SOA refresh timer is set to 3600 seconds. What is the most likely reason the slave is not initiating a transfer?

   • AThe slave is using DNSExpress
   • BThe master's SOA serial is lower than the slave's
   • CThe refresh timer is too low
   • DThe slave is not configured to accept NOTIFY from the master
   Reveal Solution Discussion Select an answer first
6. 15expert · hard

   An organization has two BIG-IP DNS systems configured as masters for the same zone. Both masters are accepting dynamic updates. The administrator notices that slaves are getting different data depending on which master they query. What is the most effective way to resolve this issue?

   • AEnable DNSExpress on both masters
   • BRestrict dynamic updates to a single master and have the other master act as a slave
   • CIncrease the SOA refresh timer on the slaves
   • DConfigure the slaves to use IXFR
   Reveal Solution Discussion Select an answer first