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Cisco 300-830 CLCCE practice questions

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Question 1Cisco Collaboration Cloud and Edge Solutions

In a Cisco Unified Communications Manager cloud deployment, which component is responsible for call admission control between sites when no gatekeeper is used?

  1. Location-based call admission control Correct answer.
  2. Survivable Remote Site Telephony
  3. Region-based codec policy
  4. Device pool failover priority

Explanation

Locations define the bandwidth budget available between sites, and Unified CM uses those budgets to permit or reject calls that would exceed the configured limits. Regions, by contrast, only decide which codec is selected between groups of devices.

Question 2Cisco Collaboration Cloud and Edge Solutions

Which Cisco collaboration edge component allows a remote endpoint to register to on-premises Unified CM without a full VPN client?

  1. Cisco Meeting Server
  2. Cisco Prime Collaboration Assurance
  3. Cisco Expressway with Mobile and Remote Access Correct answer.
  4. Cisco Unified Border Element

Explanation

Mobile and Remote Access on Expressway-C and Expressway-E uses a traversal zone to let off-premises endpoints register and place calls without a VPN tunnel. The Expressway-E sits in the DMZ while Expressway-C faces the internal network.

Question 3Cisco Collaboration Cloud and Edge Solutions

A company wants to send PSTN calls from its on-premises Unified CM cluster to a Cisco Webex Calling cloud service. Which edge element is required to normalize and secure the SIP signaling between the enterprise and the cloud?

  1. Cisco IM and Presence Service
  2. Cisco Emergency Responder
  3. Cisco Unified Border Element Correct answer.
  4. Cisco Unity Connection

Explanation

The Unified Border Element acts as a session border controller, terminating and re-originating SIP to handle topology hiding, normalization, and security between the enterprise and the service provider or cloud. Unified CM alone does not provide that demarcation function.

Question 4Cisco Collaboration Cloud and Edge Solutions

Which certificate must be trusted on the Expressway-E for Mobile and Remote Access to work with endpoints that validate the server identity?

  1. The Unified CM Tomcat certificate
  2. A self-signed certificate generated on Expressway-C
  3. A certificate issued by a publicly trusted CA whose subject matches the traversal domain Correct answer.
  4. The endpoint LSC certificate

Explanation

Off-net endpoints reach Expressway-E over the internet and validate its identity, so the certificate must chain to a public CA and include the traversal domain in the subject or SAN. Internal certificates such as Tomcat are not trusted by external clients.

Question 5Cisco Collaboration Cloud and Edge Solutions

What is the primary purpose of a traversal zone between Expressway-C and Expressway-E?

  1. To translate SCCP to SIP for legacy endpoints
  2. To carry signaling and media for firewall traversal between the internal and DMZ networks Correct answer.
  3. To load balance registrations across multiple Unified CM subscribers
  4. To replicate database changes between clusters

Explanation

A traversal zone connects the internal Expressway-C to the DMZ Expressway-E so that signaling and media can pass through the firewall using outbound connections. It is the core mechanism that makes Mobile and Remote Access possible.

Question 6Cisco Collaboration Cloud and Edge Solutions

Which DNS record type is used to let remote endpoints discover the Expressway-E traversal address for Mobile and Remote Access?

  1. PTR record for the gateway
  2. A record for the Unified CM publisher
  3. MX record for the messaging domain
  4. SRV record for _collab-edge._tls Correct answer.

Explanation

Endpoints query the _collab-edge._tls SRV record to locate the Expressway-E over TLS for Mobile and Remote Access. The _cisco-uds SRV record is used internally to find Unified CM services.

Question 7Cisco Collaboration Cloud and Edge Solutions

In a Webex hybrid deployment, which service connects on-premises Unified CM to the Webex cloud for call routing between the two environments?

  1. Cisco Unified Communications Manager Cloud Connected PSTN
  2. Cisco Webex Edge Audio Correct answer.
  3. Cisco Smart Software Manager
  4. Cisco Hosted Collaboration Solution

Explanation

Webex Edge Audio links an on-premises Unified CM environment to Webex meetings so that audio can be routed locally instead of through the cloud. It uses a connector on-premises to establish the connection to Webex.

Question 8Cisco Collaboration Cloud and Edge Solutions

Which deployment model places the call control servers in the Cisco cloud while endpoints register over the internet?

  1. Cisco Unified CM on-premises
  2. Cisco Hosted Collaboration Solution
  3. Webex Calling Correct answer.
  4. Cisco Unified CM Session Management Edition

Explanation

Webex Calling is a cloud-delivered call control service where endpoints register to the Webex cloud rather than to a local cluster. Customers do not operate the call control servers themselves.

Question 9Cisco Collaboration Cloud and Edge Solutions

A branch site loses its WAN link to the centralized Unified CM cluster. Which feature keeps basic calls working locally using an integrated router gateway?

  1. Cisco Emergency Responder
  2. Survivable Remote Site Telephony Correct answer.
  3. Cisco Expressway MRA
  4. Cisco Unified Border Element

Explanation

SRST runs on a branch router and takes over call control for registered endpoints when they lose connectivity to Unified CM. The endpoints fall back to the SRST reference configured in their device pool.

Question 10Cisco Collaboration Cloud and Edge Solutions

Which statement describes the role of the Expressway-C in a Mobile and Remote Access deployment?

  1. It hosts the voicemail application for remote users.
  2. It sits in the DMZ and terminates internet-facing TLS from endpoints.
  3. It provides PSTN gateway functions for the cluster.
  4. It sits on the internal network and connects to Unified CM and the traversal zone. Correct answer.

Explanation

Expressway-C is deployed inside the enterprise firewall and connects to Unified CM, IM and Presence, and the traversal zone toward Expressway-E. It does not directly face the internet.

Question 11Cisco Collaboration Cloud and Edge Solutions

When configuring a SIP trunk between Unified CM and a Cisco Webex Calling cloud service, which setting ensures that calls use the correct codec across the internet edge?

  1. Enterprise parameter for cluster MTU
  2. Device mobility profile
  3. Service profile for endpoint provisioning
  4. Region and location configuration to select G.711 or G.729 per site Correct answer.

Explanation

Regions determine which codec is negotiated between device groups, and locations enforce the bandwidth budget between sites. Together they control how calls to the cloud edge are encoded and admitted.

Question 12Cisco Collaboration Cloud and Edge Solutions

Which protocol does Expressway use between Expressway-C and Expressway-E to traverse firewalls?

  1. TLS over outbound connections from Expressway-C to Expressway-E Correct answer.
  2. GRE tunnels initiated by Expressway-E
  3. SSH port forwarding
  4. IPsec with static peer addresses

Explanation

Traversal uses outbound TLS connections from the internal Expressway-C to the DMZ Expressway-E, which avoids opening inbound pinholes in the firewall. Media is multiplexed over these connections using the Assent protocol.

Question 13Cisco Collaboration Cloud and Edge Solutions

What is the function of a Unified CM SIP trunk to a Cisco Unified Border Element?

  1. To provide voicemail storage
  2. To synchronize user data with the directory
  3. To register endpoints to the cluster
  4. To hand off calls between Unified CM and external networks through the UBE Correct answer.

Explanation

A SIP trunk from Unified CM to the UBE lets calls egress and ingress between the enterprise and external networks. The UBE then applies normalization, security, and interworking before handing calls to the provider.

Question 14Cisco Collaboration Cloud and Edge Solutions

Which consideration applies when deploying Expressway-E in a DMZ with dual network interfaces?

  1. The internal interface must be publicly routable for endpoint registration.
  2. The internal interface must not be reachable from the internet and static NAT should be configured for the external interface. Correct answer.
  3. The external interface should be disabled when MRA is enabled.
  4. Both interfaces must share the same IP address.

Explanation

Expressway-E uses a dual-homed design where the external interface faces the internet behind static NAT and the internal interface faces the DMZ toward Expressway-C. The internal interface must never be exposed to the internet.

Question 15Cisco Collaboration Cloud and Edge Solutions

Which Cisco product provides directory synchronization and user provisioning for a Webex cloud deployment?

  1. Cisco Emergency Responder
  2. Cisco Directory Connector Correct answer.
  3. Cisco Unified Border Element
  4. Cisco Prime Collaboration Provisioning

Explanation

Directory Connector synchronizes users from an on-premises directory such as Active Directory into the Webex cloud. This enables consistent identity and provisioning across the cloud services.

Question 16Cisco Collaboration Cloud and Edge Solutions

A remote user reports that registration to Unified CM works but calls fail with no audio. Which Expressway configuration should be verified first?

  1. Media traversal and the firewall rules for the media port range Correct answer.
  2. The NTP source on the cluster
  3. The Unified CM database replication status
  4. The endpoint firmware version

Explanation

When signaling succeeds but media fails, the likely cause is blocked media traversal between the endpoints and the Expressway-E. Verifying the media port range and firewall rules between Expressway-C and Expressway-E is the first step.

Question 17Cisco Collaboration Cloud and Edge Solutions

Which statement best describes the relationship between a region and a location in Unified CM?

  1. A region enforces bandwidth, and a location selects the codec.
  2. Both regions and locations enforce bandwidth budgets.
  3. A region selects the codec between device groups, and a location enforces the bandwidth budget between sites. Correct answer.
  4. Both regions and locations select codecs.

Explanation

Regions are used for codec selection between groups of devices, while locations define the available bandwidth for calls between sites. They serve complementary purposes in call admission and media planning.

Question 18Cisco Collaboration Cloud and Edge Solutions

Which feature allows a Webex Calling user to place and receive PSTN calls through a service provider while keeping the call control in the cloud?

  1. Cisco Expressway MRA
  2. Cisco Unified CM Session Management Edition
  3. Cisco Unified Border Element
  4. Cloud Connected PSTN Correct answer.

Explanation

Cloud Connected PSTN provides PSTN connectivity for Webex Calling through a certified provider while call control remains in the Webex cloud. It removes the need for an on-premises gateway for PSTN access.

Question 19Cisco Collaboration Cloud and Edge Solutions

Which protocol is used by Expressway to multiplex media over the traversal connection?

  1. Assent Correct answer.
  2. H.323
  3. MGCP
  4. SCCP

Explanation

Assent is the protocol Expressway uses to multiplex media over the traversal connection between Expressway-C and Expressway-E. It allows multiple media streams to share the outbound TLS connection.

Question 20Cisco Collaboration Cloud and Edge Solutions

What is the purpose of the _cisco-uds SRV record in a collaboration deployment?

  1. To resolve the gateway address for PSTN calls
  2. To let internal endpoints discover Unified CM services for registration Correct answer.
  3. To route email for the messaging domain
  4. To let remote endpoints find Expressway-E over the internet

Explanation

The _cisco-uds SRV record points internal endpoints to the Unified CM service for registration and provisioning. It is distinct from _collab-edge, which is used for external traversal discovery.

Question 21Cisco Collaboration Cloud and Edge Solutions

Which component in a Webex hybrid architecture establishes a secure connection from on-premises Unified CM to Webex meetings for Edge Audio?

  1. Unified CM publisher
  2. Expressway-C with the Webex Edge Audio connector Correct answer.
  3. Unity Connection
  4. Expressway-E in the DMZ

Explanation

The Webex Edge Audio connector runs on Expressway-C and establishes the secure connection from on-premises Unified CM to Webex meetings. This allows local routing of meeting audio for on-net participants.

Question 22Cisco Collaboration Cloud and Edge Solutions

Which statement accurately describes a potential risk of using a self-signed certificate on Expressway-E for Mobile and Remote Access?

  1. The certificate cannot include a subject alternative name.
  2. The certificate blocks signaling but allows media.
  3. Remote endpoints may reject the certificate because it is not chained to a trusted public CA. Correct answer.
  4. The certificate expires too quickly to be usable.

Explanation

Remote endpoints validate the Expressway-E identity against trusted public CAs, so a self-signed certificate will typically be rejected. This prevents registration for off-net endpoints.

Question 23Cisco Collaboration Cloud and Edge Solutions

Which capability does Cisco Unified CM Session Management Edition provide in a large collaboration deployment?

  1. Cloud call control for remote endpoints
  2. Aggregation of multiple Unified CM clusters and trunks behind a single dial plan Correct answer.
  3. Local branch survivability
  4. Voicemail and messaging services

Explanation

Session Management Edition is a Unified CM variant used to aggregate many clusters and trunks behind a centralized dial plan without registering endpoints. It simplifies large multi-cluster environments.

Question 24Cisco Collaboration Cloud and Edge Solutions

Which configuration item on Unified CM determines which SRST reference an endpoint uses when it loses WAN connectivity?

  1. Service profile
  2. Device pool Correct answer.
  3. Location
  4. Region

Explanation

The SRST reference is configured in the device pool assigned to the endpoint, so when connectivity to Unified CM is lost, the endpoint falls back to that reference. Regions and locations do not control SRST fallback.

Question 25Cisco Collaboration Cloud and Edge Solutions

Which statement describes how Expressway handles call signaling for Mobile and Remote Access when the endpoint is off-premises?

  1. Signaling is handled locally by SRST on the branch router.
  2. Signaling goes directly from the endpoint to Unified CM over the internet.
  3. Signaling is proxied through Expressway-E and Expressway-C to Unified CM. Correct answer.
  4. Signaling is routed through the UBE to the PSTN.

Explanation

For Mobile and Remote Access, signaling from off-premises endpoints is proxied through Expressway-E and Expressway-C before reaching Unified CM. The traversal zone carries this signaling across the firewall.

Question 26Cisco Collaboration Cloud and Edge Solutions

In a Cisco Webex hybrid deployment, which on-premises component is registered to the Webex cloud to enable directory-based call routing between Unified CM and Webex services?

  1. Cisco Prime Collaboration Provisioning
  2. Cisco Meeting Server in the data center
  3. Cisco Expressway-C registered as a hybrid connector Correct answer.
  4. Cisco Unified Border Element in the DMZ

Explanation

Hybrid call and directory services rely on an Expressway-C registered to the Webex cloud, which acts as the connector between on-premises Unified CM and cloud services. The connector maintains an outbound secure connection so no inbound firewall ports are required.

Question 27Cisco Collaboration Cloud and Edge Solutions

Which Expressway-E deployment characteristic is required for Mobile and Remote Access to work with internet-based endpoints?

  1. It must be reachable from the public internet and hold a certificate trusted by the endpoints Correct answer.
  2. It must run only the call control discovery service
  3. It must be deployed inside the corporate LAN with no DMZ interface
  4. It must be clustered with the Expressway-C in the same subnet

Explanation

Expressway-E terminates traversal connections from remote endpoints, so it needs a publicly resolvable address and a certificate that endpoints trust. Without either, endpoints cannot establish the secure traversal session.

Question 28Cisco Collaboration Cloud and Edge Solutions

Which Unified CM configuration object defines the codec preference list applied between devices within the same cluster?

  1. Region Correct answer.
  2. Device Pool
  3. SIP Profile
  4. Location

Explanation

Regions define the maximum codec and bandwidth allowed between groups of devices, controlling which codecs are negotiated. Locations then govern the bandwidth budget for calls between those regions.

Question 29Cisco Collaboration Cloud and Edge Solutions

Which Cisco component centralizes SIP trunk normalization and demarcation between a Unified CM cluster and an external service provider network?

  1. Cisco Expressway-C
  2. Cisco Emergency Responder
  3. Cisco Unified Border Element Correct answer.
  4. Cisco Unified Communications Manager IM and Presence

Explanation

Unified Border Element provides a SIP demarcation point that performs normalization, security, and interworking between enterprise and provider networks. It isolates Unified CM from provider-specific SIP behavior.

Question 30Cisco Collaboration Cloud and Edge Solutions

Which protocol does Expressway use to establish the secure traversal channel that carries media between Expressway-C and Expressway-E?

  1. SNMP over UDP 161
  2. H.323 RAS over UDP 1719
  3. MGCP over UDP 2427
  4. Assigned traversal media ports over TLS-signaled connections Correct answer.

Explanation

Expressway traversal uses a signaling channel over TLS and negotiates dedicated media ports for the traversal traffic. The media ports are allocated dynamically and must be permitted between the two appliances.

Question 31Cisco Collaboration Cloud and Edge Solutions

Which DNS record allows remote endpoints to locate the Unified CM registration service when using Mobile and Remote Access?

  1. A CNAME for the Expressway-E public address
  2. An MX record
  3. A _cisco-uds SRV record Correct answer.
  4. A PTR record

Explanation

The _cisco-uds SRV record points endpoints to the Unified CM service for service discovery. Expressway-E then uses this information to route registration requests to the correct cluster.

Question 32Cisco Collaboration Cloud and Edge Solutions

Which capability does Cisco Unified CM Session Management Edition provide in a large multi-cluster deployment?

  1. It provides PSTN gateway media termination for all calls
  2. It hosts the Webex cloud directory connector
  3. It replaces Expressway for remote endpoint registration
  4. It aggregates multiple leaf Unified CM clusters behind a single SIP trunking interface Correct answer.

Explanation

Session Management Edition acts as a trunking-only aggregation layer that presents many leaf clusters to the PSTN or to other networks through a simplified interface. It does not register endpoints itself.

Question 33Cisco Collaboration Cloud and Edge Solutions

A branch loses its WAN link to the centralized Unified CM cluster. Which mechanism keeps basic calls working at the branch?

  1. Unified CM Session Management Edition
  2. Expressway-E traversal
  3. Survivable Remote Site Telephony configured on the branch router Correct answer.
  4. A second SIP trunk to the provider

Explanation

Survivable Remote Site Telephony runs on the branch router and takes over call control when the phones lose their WAN connection to Unified CM. Endpoints fall back to the SRST reference configured in their device pool.

Question 34Cisco Collaboration Cloud and Edge Solutions

A remote endpoint registers through Mobile and Remote Access but receives one-way audio on external calls. Which Expressway configuration should be verified first?

  1. The device pool SRST reference
  2. The _cisco-uds SRV record priority
  3. The Unified CM region codec settings
  4. The media traversal port range is permitted between Expressway-C and Expressway-E Correct answer.

Explanation

One-way audio in MRA commonly indicates that the negotiated media ports are blocked between Expressway-C and Expressway-E. The traversal port range must be open in both directions across the firewall separating them.

Question 35Cisco Collaboration Cloud and Edge Solutions

Which statement describes the role of Expressway-C in a Mobile and Remote Access deployment?

  1. It stores the endpoint configuration database for Unified CM
  2. It proxies registration and signaling from the internal network toward Expressway-E Correct answer.
  3. It provides PSTN gateway services for remote users
  4. It terminates public internet connections directly from endpoints

Explanation

Expressway-C sits on the internal network and acts as the trusted proxy toward Unified CM, forwarding registration and call signaling to Expressway-E. It never receives direct connections from the public internet.

Question 36Cisco Collaboration Cloud and Edge Solutions

When configuring a SIP trunk between Unified CM and a Webex Calling cloud service, which setting ensures calls are routed to the correct cloud tenant?

  1. The device pool region assignment
  2. The cluster-wide enterprise parameter for CDR
  3. The SRST reference on the trunk
  4. The destination address and associated route group pointing to the cloud edge Correct answer.

Explanation

The trunk must point to the cloud edge address and be referenced by a route group and route list so calls reach the correct tenant. Without correct destination routing, calls fail or land on the wrong service.

Question 37Cisco Collaboration Cloud and Edge Solutions

Which consideration applies when placing Expressway-E with dual network interfaces in a DMZ?

  1. Both interfaces must share the same public IP address
  2. Traversal must be disabled on the internal interface
  3. The internal interface must not be routable from the public internet and static NAT must be configured Correct answer.
  4. The external interface must be on the internal VLAN

Explanation

Expressway-E uses a dual-homed design where the external interface faces the internet behind static NAT and the internal interface faces the corporate network. Keeping the internal interface unreachable from outside preserves the security model.

Question 38Cisco Collaboration Cloud and Edge Solutions

Which statement accurately describes the risk of using a self-signed certificate on Expressway-E for Mobile and Remote Access?

  1. Traversal media is sent unencrypted
  2. The Expressway-C loses its cluster configuration
  3. Unified CM refuses to register any endpoints
  4. Remote endpoints do not trust the certificate and traversal connections fail certificate validation Correct answer.

Explanation

Endpoints validate the Expressway-E certificate during traversal setup, so a self-signed certificate that is not in their trust store causes the connection to fail. A certificate from a trusted public CA avoids this problem.

Question 39Cisco Collaboration Cloud and Edge Solutions

Which feature allows a Webex Calling user to place and receive PSTN calls through a service provider while keeping the cloud call control?

  1. Unified CM Session Management Edition
  2. Local gateway or cloud-connected PSTN service Correct answer.
  3. Expressway-E traversal for PSTN
  4. A second Unified CM cluster at the branch

Explanation

Webex Calling supports PSTN connectivity through a cloud-connected provider or an on-premises local gateway registered to the cloud. Call control remains in the cloud while PSTN traffic is handed off at the chosen egress point.

Question 40Cisco Collaboration Cloud and Edge Solutions

Which component in a Webex hybrid architecture establishes a secure connection from on-premises Unified CM to Webex meetings?

  1. Cisco Unified Border Element
  2. Cisco Meeting Server
  3. Cisco Prime Collaboration Assurance
  4. Expressway-C registered to the Webex cloud as a hybrid connector Correct answer.

Explanation

The hybrid connector on Expressway-C maintains an outbound secure connection that links on-premises call control to Webex meeting services. It enables features such as calendaring and one-button-to-push meeting joins.

Question 41Cisco Collaboration Cloud and Edge Solutions

An administrator must ensure that a remote endpoint's registration survives a WAN failure between the branch and the centralized cluster. Which configuration item determines the fallback reference the endpoint uses?

  1. The enterprise parameter for cluster discovery
  2. The SRST reference assigned in the device pool Correct answer.
  3. The region assigned to the endpoint
  4. The SIP profile attached to the trunk

Explanation

The SRST reference is assigned through the device pool, and endpoints use it when they lose contact with Unified CM. The branch router must also be configured to serve those endpoints.

Question 42Cisco Collaboration Cloud and Edge Solutions

A design requires that remote endpoints use a trusted public certificate on Expressway-E while internal endpoints continue to register directly to Unified CM. Which design choice satisfies both requirements?

  1. Deploy two Expressway-C nodes and no Expressway-E
  2. Deploy Expressway-E in the DMZ with a CA-signed certificate and Expressway-C internally, leaving internal registration on Unified CM Correct answer.
  3. Deploy Unified Border Element in the DMZ with a CA-signed certificate
  4. Deploy a single Expressway-E inside the LAN with a self-signed certificate

Explanation

The standard split places Expressway-E in the DMZ with a publicly trusted certificate and Expressway-C on the internal network, while internal endpoints keep registering directly to Unified CM. This preserves certificate trust for remote users without changing internal registration.

Question 43Cisco Collaboration Cloud and Edge Solutions

An organization wants on-premises Unified CM users to join Webex meetings with one button from their desk phones. Which hybrid service must be enabled and what does it depend on?

  1. Hybrid messaging, which depends on IM and Presence only
  2. Hybrid calendaring, which depends on the Expressway-C connector and directory synchronization Correct answer.
  3. Hybrid media, which depends on the border element only
  4. Hybrid call, which depends on a provider SIP trunk only

Explanation

One-button-to-push meeting joins rely on hybrid calendaring, which uses the Expressway-C connector to reach Webex and directory data to match users. Without synchronization the service cannot associate endpoints with cloud identities.

Question 44Cisco Collaboration Cloud and Edge Solutions

A company plans to connect 40 branch clusters to a single provider SIP trunk while keeping dial plans independent. Which architecture best meets this requirement?

  1. Replace all leaf clusters with Expressway-C nodes
  2. Connect each leaf cluster directly to the provider with its own trunk
  3. Route all calls through a single branch SRST router
  4. Aggregate the leaf clusters behind Unified CM Session Management Edition and present one trunk interface to the provider Correct answer.

Explanation

Session Management Edition aggregates leaf clusters and presents a consolidated trunking interface while each leaf keeps its own dial plan. This reduces trunk count and simplifies provider interconnection.

Question 45Cisco Collaboration Cloud and Edge Solutions

Which design consideration applies when sizing traversal bandwidth for Mobile and Remote Access?

  1. Rely on Unified CM locations to police traversal bandwidth automatically
  2. Assume all remote endpoints use G.729 exclusively
  3. Account for the maximum concurrent remote calls and their negotiated codecs across the traversal link Correct answer.
  4. Size only for signaling traffic because media bypasses Expressway

Explanation

Traversal links carry remote media, so capacity planning must consider peak concurrent calls and the codecs in use. Unified CM locations do not police bandwidth on the traversal path itself.

Question 46Cisco Collaboration Cloud and Edge Solutions

Which statement correctly distinguishes the Expressway traversal solution from a traditional VPN for remote collaboration endpoints?

  1. Traversal exposes only collaboration services through a proxied connection rather than granting full network access Correct answer.
  2. Traversal encrypts only signaling and leaves media in clear text
  3. Traversal provides full IP-layer access to the corporate network
  4. Traversal requires endpoints to install a VPN client before registering

Explanation

Expressway traversal proxies collaboration protocols so remote endpoints reach only the services they need, unlike a VPN that grants broad network-level access. This limits exposure while supporting registration and calls.

Question 47Cisco Collaboration Cloud and Edge Solutions

Which statement describes the purpose of the _collab-edge SRV record in a collaboration deployment?

  1. It registers gateways with the Session Management Edition
  2. It lets remote endpoints discover the Expressway-E traversal address for Mobile and Remote Access Correct answer.
  3. It routes email for the collaboration domain
  4. It lets internal endpoints locate the Unified CM TFTP server

Explanation

The _collab-edge SRV record publishes the Expressway-E address so remote endpoints can find the traversal entry point. Endpoints query it when they are outside the corporate network.

Question 48Cisco Collaboration Cloud and Edge Solutions

In a Cisco Webex hybrid architecture, which service enables users registered to on-premises Unified CM to join Webex meetings from a desk phone with a single button press, without requiring a separate gateway per site?

  1. Cisco Webex Hybrid Call Service Connect Correct answer.
  2. Cisco Webex Hybrid Directory Service
  3. Cisco Webex Hybrid Message Service
  4. Cisco Webex Hybrid Calendar Service

Explanation

Hybrid Call Service Connect links on-premises Unified CM to the Webex cloud so that users retain their on-premises endpoints while gaining cloud calling and one-button meeting join from those devices. Calendar Service only surfaces meeting prompts on endpoints, and Message and Directory services synchronize messaging and user data rather than call routing.

Question 49Cisco Collaboration Cloud and Edge Solutions

An engineer must connect an on-premises Unified CM cluster to Webex Calling using a SIP trunk. Which configuration element on Unified CM is required so that calls are accepted by the Webex Calling cloud rather than rejected for identity mismatch?

  1. A SIP trunk security profile using TLS with a certificate trusted by the Webex cloud Correct answer.
  2. A device pool whose region uses the G.722 codec as the only allowed codec
  3. A SIP profile with the 'Allow Presentation Sharing using BFCP' option enabled
  4. A route group configured with the 'Pilot Point' option enabled for the trunk

Explanation

Webex Calling cloud peering requires a secure SIP trunk; Unified CM presents a certificate that the cloud trusts, so the SIP trunk security profile must use TLS with a certificate signed by a trusted CA. Identity and trust are established at the transport layer before call admission, so codec or presentation settings do not determine acceptance.

Question 50Cisco Collaboration Cloud and Edge Solutions

A company deploys Expressway-C and Expressway-E for Mobile and Remote Access. Internal endpoints must keep working if the Expressway pair becomes unreachable, and the security team asks why the internal DNS SRV record for _cisco-uds must resolve for internal clients. Which explanation is most accurate?

  1. It lets internal endpoints discover the Unified CM service directly so they register to Unified CM without traversing Expressway. Correct answer.
  2. It allows internal endpoints to reach Webex cloud services when the on-premises cluster is offline.
  3. It provides the certificate authority path used by internal endpoints to validate Expressway-E.
  4. It forces internal endpoints to register through Expressway-E so that all signaling is inspected in the DMZ.

Explanation

Internal endpoints query _cisco-uds and, when it resolves, register directly with Unified CM, keeping them independent of the Expressway pair. The _collab-edge SRV record is what directs external endpoints to Expressway-E for traversal, so the two records serve opposite client populations.