300-070 · Question #354
Which two ways can you configure redundancy for Cisco IP Phone services? (Choose two.)
The correct answer is B. Configure redundancy at the DNS server. E. Use Cisco IOS Server Load Balancing. Cisco IP Phone XML services are HTTP-based applications hosted on external servers; CUCM itself does not provide built-in failover for these service URLs. Redundancy is achieved through network-layer mechanisms: (B) DNS server redundancy - the hostname in the service URL…
Question
Which two ways can you configure redundancy for Cisco IP Phone services? (Choose two.)
Options
- AConfigure a primary and a secondary URL.
- BConfigure redundancy at the DNS server.
- CEnable Cisco IP Phone service within two servers in the cluster.
- DUse Cisco IOS as Cisco Survivable Remote Site Telephony.
- EUse Cisco IOS Server Load Balancing.
How the community answered
(48 responses)- A6% (3)
- B75% (36)
- C4% (2)
- D15% (7)
Explanation
Cisco IP Phone XML services are HTTP-based applications hosted on external servers; CUCM itself does not provide built-in failover for these service URLs. Redundancy is achieved through network-layer mechanisms: (B) DNS server redundancy - the hostname in the service URL resolves to multiple A records, so if one server is down the DNS can return an alternate address; (E) Cisco IOS Server Load Balancing (SLB) - IOS SLB acts as a virtual IP front-end and distributes HTTP requests across multiple backend IP Phone service servers. Options A, C, and D do not address redundancy for the external HTTP service itself.
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