Question 1

An engineer attempts to upload a server certificate to an Expressway-C server but receives an error when they click the upload button that says that the file is invalid. The engineer is advised that this happens because the certificate was signed incorrectly and is missing an attribute. What must the engineer do to upload the certificate?

Options :

A : Create a certificate request via Certificate Services Web Page and ensure that the certificate validity period is five years because the Expressway server validates this during certificate import.

B : Create a certificate request via the Certificate Services Web Page and ensure that the Subject Common Name field contains the server FQDN and all Cisco Unified CM phone security profile names.

C : Create a new certificate template with "Server authentication” and "Client authentication" enabled and use this template when signing the Expressway server certificate.

D : Create a new certificate template with the certificate attribute "Allow private key to be exported" enabled and use this template when signing the Expressway server certificate.

Answer: B

Question 2

Which two internal SIP endpoints behind a firewall place calls to external devices? (Choose two.)

Options :

A : An Expressway-C communicates with the internal endpoint and forwards the media to and from an Expressway-E.

B : A Cisco Endpoint is configured with a publicly routable static NAT SIP address to advertise instead of is private IP address.

C : An Expressway-C communicates directly with the remote party using the ICE protocol

D : An Expressway-E is used as a VPN server to allow remote SIP edge servers to connect calls

E : An Expressway-C rewrites the SIP SDP to advertise its own IP address to the external party.

Answer: A,D

Question 3

Which attribute in the SDP for a call is affected by the static NAT address configuration in an ExpresswayE?

Options :

A : connection

B : name

C : version

D : bandwidth

Answer: B

Question 4

An Expressway pairs deployed for Mobile and Remote Access. An administrator installs a new server certificate on the Expressway-E. After installing the new certificate, the UC Traversal zone between Expressway-C and Expressway-E is active. Still, Jabber Mobile and Remote Access clients cannot log in over the Expressway. The certificate Common Name is the FQDN of Expressway-E, “expe01 example.com”, and the certificate contains no additional names. Which Subject Alternate Name must be added to the certificate to allow Jabber Mobile and Remote Access clients to log in successfully?

Options :

A : FQDN of the Expressway-C, “expc01.example.local”

B : registration domain, “example.com” or “collab-edge.example.com”

C : Cisco UCM cluster FQDN, “cucmcluster.example.local”

D : FQDN of the Expressway-E, “expe01.example.com”

Answer: B

Question 5

300-820-page39-image23

Refer to the exhibit. If the Webex Teams device cannot connect to Video Mesh Cluster-1 because it is

busy, which media node does the Webex Teams device connect to next?

Options :

A : Both Cloud Node US-EAST and US-WEST

B : Video Mesh Cluster-2

C : Cloud Node US-EAST

D : Cloud Node US-WEST

Answer: B

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