350-801 · Question #298
If a phone needs to register with cucm1.cisco.com, which network service assists with the phone registration process?
The correct answer is C. DNS. For an IP phone to register with a Cisco Unified Communications Manager (CUCM) using a hostname, the Domain Name System (DNS) is the network service responsible for resolving that hostname to an IP address.
Question
If a phone needs to register with cucm1.cisco.com, which network service assists with the phone registration process?
Options
- ASMTP
- BICMP
- CDNS
- DSNMP
How the community answered
(54 responses)- A7% (4)
- B2% (1)
- C89% (48)
- D2% (1)
Why each option
For an IP phone to register with a Cisco Unified Communications Manager (CUCM) using a hostname, the Domain Name System (DNS) is the network service responsible for resolving that hostname to an IP address.
SMTP (Simple Mail Transfer Protocol) is used for sending and receiving email.
ICMP (Internet Control Message Protocol) is primarily used for diagnostic and error reporting purposes, such as network reachability.
DNS (Domain Name System) translates human-readable hostnames, such as 'cucm1.cisco.com', into their corresponding IP addresses, which are necessary for the phone to locate and establish communication with the Cisco Unified Communications Manager for registration.
SNMP (Simple Network Management Protocol) is used for managing and monitoring network devices.
Concept tested: DNS role in IP phone registration
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1SU1/systemConfig/cucm_b_system-configuration-guide-1251su1/cucm_b_system-configuration-guide-1251su1_chapter_010.html
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