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Cisco 300-820 exam questions online practice test
QUESTION 1
Which two licenses are required for the Expressway B2B feature to work? (Choose two)
A. Traversal Server
B. Advanced Networking
C. Device Provisioning
D. Rich Media Sessions
E. TURN Relays
Correct Answer: AD
QUESTION 2
Which two statements about Mobile and Remote Access certificate are true? (Choose two.)
A. Expressway Core can use private CA signed certificate.
B. You must upload the root certificates in the phone trust store.
C. Expressway must generate certificate signing request.
D. Expressway Edge must use public CA signed certificate.
E. The Jabber client can work with public or private CA signed certificate.
Correct Answer: AC
QUESTION 3
Refer to the exhibit.
Which two outbound connections should an administrator configure on the internal firewall? (Choose two.)
A. XMPP: TCP 7400
B. SIP: TCP 7001
C. SIP TCP 5061
D. Media: UDP 36012 to 59999
E. HTTPS: TCP 8443
Correct Answer: AB
Reference: https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-5/CiscoExpressway-IP-Port-Usage-for-Firewall-Traversal-Deployment-Guide-X12-5.pdf
QUESTION 4
Which configuration is required when implementing Mobile and Remote Access on Cisco Expressway?
A. IPS
B. SAML authentication
C. Cisco Unified CM publisher address
D. SSO
Correct Answer: C
QUESTION 5
Refer to the exhibit. Which two numbers match the regular expression? (Choose two.)
A. d20d16d20d22
B. 2091652010224
C. 209165200225
D. d209d165d200d224
E. 209165200224
Correct Answer: CE
QUESTION 6
When an Expressway-E is configured for static NAT, which Session Description Protocol attribute is modified to reflect
the NAT address?
A. SDP b-line
B. SIP record route
C. SDP c-line
D. SDP m-line
Correct Answer: C
QUESTION 7
Which role does Call Policy play when preventing toll fraud on Expressways?
A. It controls which calls are allowed, which calls are rejected, and which calls are redirected to a different destination.
B. It changes the calling and called number on a call.
C. It changes the audio protocol used by a call through Expressways.
D. It changes the audio codec used in a call through Expressways.
Correct Answer: A
QUESTION 8
When designing the call control on a Cisco Expressway Core, which is the sequence of dial plan functions?
A. transforms, CPL, user policy, search rules
B. search rules, zones, local zones
C. DNS zone, local zone, search rules
D. search rules, transforms
Correct Answer: A
QUESTION 9
Which step is taken when configuring a Cisco Expressway solution?
A. Configure the Expressway-E by using a non-traversal server zone.
B. Enable static NAT on the Expressway-E only.
C. Disable H.323 mode on the Expressway-E.
D. Enable H.323 H.460.19 demultiplexing mode on the Expressway-C.
Correct Answer: B
QUESTION 10
What is a key configuration requirement for Hybrid Message Service High Availability deployment with multiple IM and
Presence clusters?
A. You must have the Intercluster Sync Agent working across your IM and Presence clusters.
B. You must have the Intercluster Lookup Service working across all of your IM and Presence clusters.
C. Your IM and Presence Service clusters must have Multiple Device Messaging disabled.
D. AXL service should be activated only on the publisher of each IM and Presence cluster.
Correct Answer: A
QUESTION 11
How does an administrator configure an Expressway to make sure an external caller cannot reach a specific internal
address?
A. add the specific URI in the firewall section of the Expressway and block it
B. block the call with a call policy rule in the Expressway-E
C. add a search rule route all calls to the Cisco UCM
D. configure FAC for the destination alias on the Expressway
Correct Answer: B
QUESTION 12
Cisco Collaboration endpoints are exchanging encrypted signaling messages.
What is one major complication in implementing NAT ALG for voice and video devices?
A. Internal endpoints cannot use addresses from the private address space.
B. The NAT ALG cannot inspect the contents of encrypted signaling messages.
C. NAT ALG introduces jitter in the voice path.
D. Source addresses cannot provide the destination addresses that remote endpoints should use for return packets.
Correct Answer: B
QUESTION 13
What is the purpose of a transform in the Expressway server?
A. A transform has the function as a neighbor zone in the Expressway. It creates a connection with another server.
B. A transform changes the audio codec when the call goes through the Expressway.
C. A transform is used to route calls to a destination.
D. A transform changes an alias that matches certain criteria into another alias.
Correct Answer: D
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