Practice 300-820 Exam Online

Question 1

An Expressway Server has both network protocols (IPv4 and IPv6) enabled. Which two behaviors are correct? (Choose two.)

A :

If the calling endpoint is on an IPv4-Only network and the called endpoint is on an IPV6-Only network, a NAT64 device must convert the IPv4 addresses to IPv6 addresses.

B :

Endpoints register with either IPv4 or IPv6 addresses, but dual-stack endpoints choose IPv6 protocol by default.

C :

If the calling endpoint is on an IPv4-Only network and the called endpoint is on an IPv6-Only network, the Expressway Server act as a gateway and convert the two protocol versions.

D :

Endpoints register only with IPv6 addresses on an Expressway Server with IPv6 protocol enabled regardless of the state of IPv4 protocol.

E :

Endpoints register with either IPv4 or IPv6 addresses, and endpoints decide which protocol to use by the format of the configured Expressway Server IP address.

Answer: C,E

Question 2

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

Answer: A,D

Question 3

Refer to the exhibit. An engineer is deploying mobile and remote access in an environment that already had functioning Business to Business calling. Mobile and remote access SIP registrations are failing. To troubleshoot, SIP logs were collected. How is this issue resolved?

A :

Change the SIP profile on the SIP trunk for the Expressway-E to Standard SIP Profile for TelePresence Endpoint

B :

Change the “Incoming Port” in the SIP Trunk Security Profile for the Expressway-C to not match SIP line registrations

C :

Enable autoregistration for the appropriate DN range on the Cisco UCM servers running the CallManager service

D :

Write a custom normalization script since the “vcs-interop” normalization script does not allow registrations

Answer: B

Question 4

When deploying an Expressway Core and Expressway Edge cluster for mobile and remote access, which TLS verify subject name must be configured on the Expressway-E UC traversal zone?

A : Webex CUSP Cluster Name

B : Expressway-E Cluster Name

C : Cisco Unified Communications Manager Publisher FQDN

D : Expressway-C Cluster Name

Answer: D

Question 5

An administrator is configuring a new Cisco Webex Hybrid Message Service deployment, and the Expressway-C Message Connector is successfully registered in the Control Hub. After the server information of the IM and Presence server is added to the Expressway-C, an error “Connectivity to IM and Presence AXL Service could not be established” is displayed in the Control Hub. The Cisco AXL Web Service is enabled on the IM and Presence Service publisher, and the main administrator account enabled for AXL API permission is being used. Which configuration change must be made to resolve this error?

A : Enable the Cisco AXL Web Service on the Control Hub

B : Enable the Cisco AXL Web Service on the Expresswav-C Message Connector

C : Enable an End User account for AXLAPI permissions on the IM and Presence Service publisher

D :

Enable a second administrator account for AXL API permissions on the IM and Presence Service publisher

Answer: D

Name:	Implementing Cisco Collaboration Hybrid and Cloud Technologies v2.0 (CLHCT)
Exam Code:	300-820
Certification:	CCNP Collaboration
Vendor:	Cisco
Total Questions:	205
Last Updated:	May 06, 2026

Cisco 300-820 Answers