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300-820 Implementing Cisco Collaboration Cloud and Edge Solutions (300-820 CLCEI) Question and Answers

Question # 4

Which complication does a NAT introduce in SDP for a SIP call?

A.

Additional headers due to NAT encapsulation can cause the packet size to exceed the MTU.

B.

When the client is behind a NAT they may be unable to determine the appropriate offset due to time zones.

C.

The IP address specified in the connection data field may be an unrouteable internal address.

D.

The encryption keys advertised in the SDP are only valid for clients not behind a NAT.

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Question # 5

When deploying an Expressway Core and Expressway Edge cluster for mobile and remote access, which TLS verify subject name must be configured on the Expressway-E UC traversal zone?

A.

Webex CUSP Cluster Name

B.

Expressway-E Cluster Name

C.

Cisco Unified Communications Manager Publisher FQDN

D.

Expressway-C Cluster Name

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Question # 6

A company has enabled ICE to optimize call flows and improve video quality between their Cisco Collaboration endpoints internally and externally.

For which reason would you see activity on the TURN server when a call is established between two external endpoints?

A.

The video call is using encryption, which is not supported by ICE with CUCM 12.5

B.

ICE cannot reduce the packet loss on the link

C.

A STUN cannot punch holes in the firewall

D.

The video call is using 4K resolution, which is not supported by ICE with CUCM 12.5

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Question # 7

An organization with a domain name of example.com.

Which two SRV records are valid for a SIP and H.323 communication? (Choose two.)

A.

_sips._tcp.example.com

B.

_sips._udp.example.com

C.

_h323ls._udp.example com

D.

_h323ls._tcp.example.com

E.

_collab-edge._tls.example.com

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Question # 8

Which DNS record and port combination must be resolved externally for Mobile and Remote Access to be used?

A.

_collab-edge on port 8443

B.

_cisco-uds-edge on port 5061

C.

_collab-edge on port 5061

D.

_cisco-uds on port 8443

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Question # 9

Which entry in the public (external) DNS is valid to configure DNS SRV records for a Cisco Mobile and Remote Access solution?

A.

_cisco-uds._tcp.

B.

_cisco-mra._tls.

C.

_collab-edge._tls.

D.

_cisco-expwy._tls.

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Question # 10

Refer to the exhibit.

Which two numbers match the regular expression? (Choose two.)

A.

d20d16d20d22

B.

2091652010224

C.

209165200225

D.

d209d165d200d224

E.

209165200224

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Question # 11

In a Mobile and Remote Access deployment, where must communications be encrypted with TLS?

A.

Cisco Expressway-E and endpoints outside the enterprise

B.

Cisco Expressway-C, Cisco Unified Communications Manager, and IM&P

C.

Cisco Expressway-C, Cisco Expressway-E, and Cisco Unified Communications Manager

D.

Cisco Expressway-C, Cisco Expressway-E, and endpoints outside the enterprise

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Question # 12

Refer to the exhibit.

Which description of the transformation is true?

A.

It converts 4123@exp-name.exp.domain: to 4123@exp.domain

B.

It changes all patterns that begin with 4123@exp-name.exp.domain: to 1@exp.domain

C.

It changes 413@exp-name.exp.domain: to 413@exp.domain

D.

It converts 4.3@exp-name.exp.domain: to 1@exp.domain

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Question # 13

Which statement about scheduling Expressway backups is true?

A.

It is not supported on the application.

B.

It is allowed from the application CLI of the Expressway only.

C.

It is allowed from the application CLI and GUI of the Expressway.

D.

It is allowed from the application GUI of the Expressway only.

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Question # 14

Which two statements about Expressway media traversal are true? (Choose two.)

A.

Expressway Control is the traversal server installed in the DMZ.

B.

The Expressway Edge must be put in a firewall DMZ segment.

C.

Cisco Unified Communications Manager zone can be either traversal server or client.

D.

The Unified Communications traversal zone can be used for Mobile and Remote Access.

E.

Both Expressway Edge interfaces can be NATed.

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