A company already has a Cisco Unified Communications Manager for internal audio and video traffic, but it requires video communication with external partners and customers. It is important to ensure security for the deployment and the connectivity.What must be set up to enable this requirement?

Cisco Expressway-C and Cisco Expressway-E

Cisco Unified Border Element and Cisco ASA Firewall

Cisco Unified Border Element and Cisco Firepower Firewall

Cisco Expressway-C and Cisco Expressway-E

Cisco Expressway-C and Cisco Unified Border Element

A company is installing Cisco Collaboration infrastructure and one of the requirements is that they must be able to communicate with many external parties that are using H.323 and SIP. Internally they want to register the endpoints only on SIP.Which functionality would describe the feature that needs to be enabled and where to achieve this?

Transcoding in Cisco Unified Communications Manager

Interworking in Cisco Unified Communications Manager

What is a key configuration requirement for Hybrid Message Service High Availability deployment with multiple IM and Presence clusters?

You must have the Intercluster Sync Agent working across your IM and Presence clusters.

You must have the Intercluster Lookup Service working across all of your IM and Presence clusters.

Your IM and Presence Service clusters must have Multiple Device Messaging disabled.

AXL service should be activated only on the publisher of each IM and Presence cluster.

Cisco Collaboration endpoints are exchanging encrypted signaling messages.What is one major complication in implementing NAT ALG for voice and video devices?

The NAT ALG cannot inspect the contents of encrypted signaling messages.

Internal endpoints cannot use addresses from the private address space.

The NAT ALG cannot inspect the contents of encrypted signaling messages.

NAT ALG introduces jitter in the voice path.

Source addresses cannot provide the destination addresses that remote endpoints should use for return packets.

What are two reasons why port 8443 is unreachable from the Internet to the Expressway-E? (Choose two.)

The SRV record for _cisco-uds is misconfigured.

The firewall is blocking the port.

The MRA license is missing on the Expressway-E.

The Unified Communications zone is down.

Transform is not configured on Expressway-E.

The SRV record for _cisco-uds is misconfigured.

The firewall is blocking the port.

Which media encryption mode can be configured on an Expressway zone?

Triple Data Encryption Standard

What is the purpose of a transform in the Expressway server?

A transform changes an alias that matches certain criteria into another alias.

A transform has the function as a neighbor zone in the Expressway. It creates a connection with another server.

A transform changes the audio codec when the call goes through the Expressway.

A transform is used to route calls to a destination.

A transform changes an alias that matches certain criteria into another alias.

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?

Encrypted IP traffic for collaboration devices always is trusted by the firewall.

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 allowed from the application CLI and GUI of the Expressway.

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.

Which connection does the traversal zone configuration define?

Cisco Expressway-C and Cisco Expressway-E platforms

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

Cisco media traversal technology has enabled a secure environment where internal video endpoints call and receive calls from external video endpoints. How does the Expressway-C and Expressway-E communicate?

Expressway-C establishes an outgoing request to Expressway-E, enabling the Expressway-E in the DMZ to notify the internal Expressway-C of an incoming call from an external endpoint.

Internal endpoints are registered to Expressway-E in the DMZ. Expressway-C, which is also in the DMZ, will receive and make calls on behalf of Expressway- E because they are in the same network.

Expressway-E establishes an outgoing request to Expressway-C, enabling the Expressway-C in the DMZ to notify the internal Expressway-E of an incoming call from an external endpoint.

Internal endpoints are registered to Expressway-C in the DMZ. Expressway-E, which is also in the DMZ, will receive and make calls on behalf of Expressway- C because they are in the same network.

Which describes what could done on the Expressway-E to successfully route calls from Expressway-C on the internal network to the Internet?

The Expressway-E could be enabled for Dual-NIC capability.

Application layer gateway could be enabled to bridge the media traffic.

A static NAT route could be added to the firewall to bridge the two networks.

The Expressway-E could be enabled for Dual-NIC capability.

The Expressway-E could be enabled for interworking.

When configuring a Cisco Expressway solution and need to design the dial plan with various rules for URIs and numbers coming through the device. To do so, it is important that some dial plan rules are applied in a certain order. When configuring the transform section, you must know the range of the priorities.Which range is correct?

any number in the drop-down menu

Which mode should be used when Call Policy is configured on Expressways?

local CPL, policy service, and off

When designing the call control on a Cisco Expressway Core, which is the sequence of dial plan functions?

transforms, CPL, user policy, search rules

search rules, zones, local zones

DNS zone, local zone, search rules

Which two items are configured when deploying a B2B collaboration solution? (Choose two.)

SIP trunk between Cisco Unified Communications Manager and Cisco Expressway-C

search rules in Cisco Expressway-E

SIP trunk between Cisco Unified Communications Manager and Cisco Expressway-C

search rules in Cisco Expressway-E

SIP trunk between Cisco Unified Communications Manager and Cisco Expressway-E

traversal client on a Cisco Expressway-E

DNS zone on a Cisco Expressway-C

Which step is taken when configuring a Cisco Expressway solution?

Enable static NAT on the Expressway-E only.

Configure the Expressway-E by using a non-traversal server zone.

Enable static NAT on the Expressway-E only.

Disable H.323 mode on the Expressway-E.

Enable H.323 H.460.19 demultiplexing mode on the Expressway-C.

Refer to the exhibit. When configuring a search rule that routes calls to a zone, what occurs when 13358 is dialed?

13358 is replaced by 135, and then is sent to the traversal zone.

13358 is replaced by 135, and then is sent to the local zone.

13358 is replaced by 135 and remains in the same zone.

13358 is replaced by 135, and then is sent to the traversal zone.

13358 is sent directly to the traversal zone.

Refer to the exhibit. Which description of the transformation is true?

It converts 4123@exp-name.exp.domain:<port> to 4123@exp.domain

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

It changes 413@exp-name.exp.domain:<port> to 413@exp.domain

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

Refer to the exhibit. In an environment SIP devices are registered to CUCM and H.323 devices to VCS.What would be required to enable these calls to setup correctly?

Change the interworking mode to On.

Change the domain of SIP endpoint A to cisco.com.

Disable SIP in the external zone.

Change the interworking mode to On.

Which step is required when configuring cloud and hybrid deployments for Cisco Jabber?

Add Jabber Users to the Cisco Webex Administration Tool.

Add the Jabber user to Cisco Unity Connection.

Add the Jabber user to Expressway-E.

Add the Jabber user to Expressway-C.

Add Jabber Users to the Cisco Webex Administration Tool.

An Expressway-E is configured using a single NIC with NAT.How must the Expressway-C traversal client zone be configured to connect to the Expressway-E?

The peer address must be the Expressway-E NAT address.

The zone profile must be set to default.

The peer address must be the Expressway-E NAT address.

The peer address must be the Expressway-E LAN 1 IP address.

Cisco 300-820 Practice Test 1 - Free Online Exam Prep & Questions

Question 1 / 40

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

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

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

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

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

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