A collaboration engineer is designing a secure B2B video communication solution using a Cisco Expressway-C/E pair. The security policy mandates that all media streams between the organization and its partners must be encrypted. However, one key partner uses a legacy H.323 system that does not support SRTP. Which SIP media encryption mode on the traversal zone connecting to the Expressway-E would best balance the security policy with the need for interoperability with this specific partner?
A network administrator is troubleshooting a new Mobile and Remote Access (MRA) deployment. Jabber clients outside the network can successfully register with CUCM and see presence status, but they experience no audio or video when placing calls. Internal Jabber clients function correctly. The following diagram shows the network topology: ```ascii Jabber Client | (Internet) | [Firewall-EXT] | (DMZ) | [Expressway-E] | [Firewall-INT] | (Internal LAN) | [Expressway-C] --- [CUCM] ``` Given this scenario, which is the most likely cause of the one-way media issue?
An organization is migrating its legacy H.323 video conferencing network to SIP. During the transition, they need their new Cisco Expressway to route calls between the two environments. Which two Expressway components are essential for enabling this H.323-to-SIP interworking? (Select TWO)
A junior administrator is configuring a search rule on a Cisco Expressway to route calls starting with the digit '9' followed by a 7-digit number to a specific SIP trunk zone. Which regular expression correctly matches this dialing pattern?
True or False: When using Cisco SMART licenses for an Expressway cluster, a separate Rich Media Session license is consumed for each active MRA registration on every node in the cluster.
A financial services firm is implementing a high-availability Expressway-C cluster. To meet compliance requirements, all configuration changes must be logged and a disaster recovery plan must be in place. When performing a backup on a clustered Expressway, what is the correct procedure?
A collaboration engineer is setting up a new Expressway-E server in a DMZ. The server will be used for both MRA and B2B traffic. According to Cisco best practices, which network interface configuration is recommended for this deployment?
Case Study: GlobalPharma Inc. GlobalPharma Inc. is a multinational pharmaceutical company with a central headquarters in New York and major research hubs in London and Tokyo. They have an existing on-premises Cisco Unified Communications Manager (CUCM) cluster at version 12.5, which handles all internal voice and video calls. They are now planning a major B2B collaboration rollout to connect securely with dozens of research partners and regulatory agencies worldwide. The network team has deployed a new Cisco Expressway-C and Expressway-E pair. The primary requirement is to prevent any unauthorized calls from traversing their Expressway infrastructure, specifically targeting the prevention of toll fraud. The Chief Information Security Officer (CISO) has explicitly forbidden the use of any custom Call Processing Language (CPL) scripts due to maintenance overhead. The goal is to create a default routing policy that blocks all calls to external numbers unless they are explicitly allowed. Specifically, they want to route calls destined for known partner domains (e.g., partner.com) to a 'B2B_Partners' neighbor zone, while rejecting all other call attempts to unknown domains or E.164 numbers. Which configuration on the Expressway-C would most effectively meet these toll fraud prevention requirements without using custom CPL scripts?
An administrator is configuring a SIP trunk from a Cisco Expressway-C to a Cisco UCM cluster for a B2B solution. The UCM requires that all incoming SIP traffic on this trunk be encrypted. Which three settings are required to establish this secure connection? (Select THREE)
A user reports that they are unable to connect to their company's collaboration services via MRA from their home office. The administrator suspects a DNS issue. Which command should the administrator ask the user to run from their home computer's command prompt to verify the crucial SRV record for MRA service discovery?