Cisco 300-820 Practice Test - Questions Answers, Page 2
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What is the Cisco-recommended key length in bits for a Cisco Expressway certificate?
1024
2048
4096
8192
Refer to the exhibit. Which two numbers match the regular expression? (Choose two.)
d20d16d20d22
2091652010224
209165200225
d209d165d200d224
209165200224
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?
The video call is using encryption, which is not supported by ICE with CUCM 12.5
ICE cannot reduce the packet loss on the link
A STUN cannot punch holes in the firewall
The video call is using 4K resolution, which is not supported by ICE with CUCM 12.5
Which role does Call Policy play when preventing toll fraud on Expressways?
It controls which calls are allowed, which calls are rejected, and which calls are redirected to a different destination.
It changes the calling and called number on a call.
It changes the audio protocol used by a call through Expressways.
It changes the audio codec used in a call through Expressways.
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?
The signaling makes it back to the endpoint because the firewall is an application layer gateway and provides address translation.
Encrypted IP traffic for collaboration devices always is trusted by the firewall.
The signaling does not make it back to the endpoint because the firewall cannot inspect encrypted traffic.
The signaling makes it back to the endpoint because the endpoint sent the private address to the external endpoint.
Which statement about scheduling Expressway backups is true?
It is not supported on the application.
It is allowed from the application CLI of the Expressway only.
It is allowed from the application CLI and GUI of the Expressway.
It is allowed from the application GUI of the Expressway only.
Between which two DTMF relay methods does the Expressway support interworking? (Choose two.)
unsolicited notify
RFC 2833
KPML
passthrough
H.245 user input indication
What allows endpoints behind a NAT to discover the paths through which they will pass media?
RTP
TLS
SNMP
ICE
Which two types of information does Cisco Expressway back up? (Choose two.)
call records
log files
IP addresses
current call states
security certificates
Which connection does the traversal zone configuration define?
Expressway-E and Collaboration Endpoints
Cisco UCS E-Series and Cisco UCM
Cisco UC and Cisco Unified Presence Server
Cisco Expressway-C and Cisco Expressway-E platforms
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