300-820 Question #171: Real Exam Question with Answer & Explanation

The correct answer is B: Expressway servers route calls based on SIP URI.. DNS is essential for SIP URI routing as it allows Expressway servers to resolve domain names to IP addresses, facilitating call routing. Using DNS eliminates the need to manually configure IP addresses for neighbor zones, allowing for dynamic resolution based on hostname, which s

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Question

Which two scenarios need a proper DNS configuration on Expressway servers? (Choose two.)

Options

AExpressway servers verify the common name attribute in server certificates.
BExpressway servers route calls based on SIP URI.
CAdmins avoid IP address configuration for neighbor zone peers.
DExpressway servers use NTP peer authentication for secure time updates.
EAdmins download software updates from the Cisco website via WebUI.

Explanation

DNS is essential for SIP URI routing as it allows Expressway servers to resolve domain names to IP addresses, facilitating call routing. Using DNS eliminates the need to manually configure IP addresses for neighbor zones, allowing for dynamic resolution based on hostname, which simplifies configuration and management.

Topics

#DNS Configuration#Expressway#SIP URI Routing#Neighbor Zones

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