300-820 practice questions 11–20

1. Question 11 · 177 in bank

   Select 2

   

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

   • Ad20d16d20d22
   • B2091652010224
   • C209165200225
   • Dd209d165d200d224
   • E209165200224

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   Answer: CE

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2. Question 12 · 177 in bank

   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?

   • AThe video call is using encryption, which is not supported by ICE with CUCM 12.5
   • BICE cannot reduce the packet loss on the link
   • CA STUN cannot punch holes in the firewall
   • DThe video call is using 4K resolution, which is not supported by ICE with CUCM 12.5

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   Answer: C

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3. Question 13 · 177 in bank

   Which role does Call Policy play when preventing toll fraud on Expressways?

   • AIt controls which calls are allowed, which calls are rejected, and which calls are redirected to a different destination.
   • BIt changes the calling and called number on a call.
   • CIt changes the audio protocol used by a call through Expressways.
   • DIt changes the audio codec used in a call through Expressways.

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   Answer: A

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4. Question 14 · 177 in bank

   What happens to the encrypted signaling traffic of a collaboration device if you place it inside a firewall with private IP addresses and try to make a call over IP without any collaboration infrastructure?

   • AThe signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.
   • BEncrypted IP traffic for collaboration devices always is trusted by the firewall.
   • CThe signaling does not make it back to the endpoint because the firewall cannot inspect encrypted traffic.
   • DThe signaling makes it back to the endpoint because the endpoint sent the private address to the external endpoint.

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   Answer: C

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5. Question 15 · 177 in bank

   Which statement about scheduling Expressway backups is true?

   • AIt is not supported on the application.
   • BIt is allowed from the application CLI of the Expressway only.
   • CIt is allowed from the application CLI and GUI of the Expressway.
   • DIt is allowed from the application GUI of the Expressway only.

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   Answer: A

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6. Question 16 · 177 in bank

   Select 2

   Between which two DTMF relay methods does the Expressway support interworking? (Choose two.)

   • Aunsolicited notify
   • BRFC 2833
   • CKPML
   • Dpassthrough
   • EH.245 user input indication

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   Answer: BE

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7. Question 17 · 177 in bank

   What allows endpoints behind a NAT to discover the paths through which they will pass media?

   • ARTP
   • BTLS
   • CSNMP
   • DICE

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   Answer: D

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8. Question 18 · 177 in bank

   Which SIP media encryption mode is applied by default for newly created zones in the Cisco Expressway?

   • AOff
   • BBest Effort
   • CAuto
   • DForce Encrypted

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   Answer: C

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9. Question 19 · 177 in bank

   Which dial plan component is configured in Expressway-C to route a call to the Cisco UCM?

   • Acall routing
   • Btraversal subzone
   • Ccall policy
   • Dsearch rule

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   Answer: D

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10. Question 20 · 177 in bank

    Select 2

    Which two types of information does Cisco Expressway back up? (Choose two.)

    • Acall records
    • Blog files
    • CIP addresses
    • Dcurrent call states
    • Esecurity certificates

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    Answer: CE

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300-820 practice, question 11. 177 questions available.