Exam 300-820 topic 1 question 99 discussion

Actual exam question from Cisco's 300-820

Question #: 99
Topic #: 1

An organization wants to be able to call IP addresses and URI addresses. An engineer must configure Cisco Expressways to manage this request from the endpoints in the organization. How would the engineer configure the Expressways to allow these calls to be completed to external IP addresses?

A. Set calls to unknown IP addresses to direct on the Cisco Expressways, and add a search rule on the Expressway-E
B. Set calls to unknown IP addresses to indirect on the Cisco Expressways, and add a search rule on the Expressway-E
C. Use search rules to manage calls to IP addresses, and the direct/indirect setting on the Expressway is used as a fallback only if the search rules do not exist
D. Set calls to unknown IP addresses to indirect on the Expressway-C and direct on the Expressway-E, and add a search rule on the Expressway-E

Show Suggested Answer

Suggested Answer: D 🗳️

by Ol_Mykhailiuk at Dec. 9, 2022, 12:55 p.m.

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Ol_Mykhailiuk

Highly Voted 1 year, 1 month ago

Selected Answer: D

Recommended configuration for firewall traversal https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/admin_guide/X14-0/exwy_b_cisco-expressway-administrator-guide/exwy_m_dial-plan-and-call-processing.html

upvoted 8 times

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Collabinski

Most Recent 1 year ago

Selected Answer: A

Expressway always attempts to place calls to known IP addresses (provided there is a search rule for Any IP Address against the Local Zone). All other IP addresses are considered to be "unknown" and are handled by the Expressway according to the Calls to Unknown IP addresses setting: • Direct: The Expressway attempts to place the call directly to the unknown IP address without querying any neighbors. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/admin_guide/X14-0/exwy_b_cisco-expressway-administrator-guide/exwy_m_dial-plan-and-call-processing.html

upvoted 1 times

Collabinski

1 year ago

Disregard. Reading further into the Recommended configuration for firewall traversal section, I think Ol_Mykhailiuk is correct. The answer is D

upvoted 1 times

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