500-325 Sample Questions & Answers

In a 'Specs-based' third-party server deployment, the customer assumes full responsibility for the hardware and the hypervisor layer. Cisco's support responsibility (via TAC) is limited to the Cisco Unified Communications applications themselves. The customer must work with their hardware vendor for any server-related issues and with VMware for any hypervisor-related issues.

Cisco Business Edition 6000/7000 appliances are purpose-built and tested for Cisco Collaboration applications only. Installing third-party applications on the same ESXi host (co-residency) is not a supported configuration and can void the support agreement. All virtual machines on a BE6000/7000 must be approved Cisco applications.

The best practice for security and reliability is to connect the CIMC to a dedicated out-of-band (OOB) management network. This isolates the critical hardware management interface from the production data and ESXi management networks, preventing potential security breaches and ensuring management access even if the production network is down.

Installing VMware Tools is a critical step after the guest OS installation. VMware Tools provides essential drivers for video, networking (VMXNET3), and memory management (balloon driver), which significantly improve the performance and manageability of the virtual machine. Without VMware Tools, the VM will have poor performance and limited functionality.

The main advantage of a Tested Reference Configuration (TRC) or Cisco Validated Design (CVD) is that the entire stack—hardware, firmware, hypervisor version, and application versions—has been tested and validated by Cisco. This ensures compatibility and performance, reduces deployment risks, and provides a clear path for support from Cisco TAC.

The core function of the Expressway-C (Core) and Expressway-E (Edge) pair is to provide secure firewall and NAT traversal for collaboration traffic. Expressway-E sits in the DMZ and Expressway-C sits on the internal network, creating a secure link for services like Mobile and Remote Access (MRA) and Webex Hybrid Services (Calendar, Call, etc.) to connect on-premises resources to the Webex cloud.

When using the KVM console's virtual media feature, the server's boot order is often temporarily set to boot from the virtual CD/DVD drive. If the ISO file is not unmapped after installation, the server will attempt to boot from the installation media again on every reboot instead of booting from the local disk where ESXi was installed.

NFS is a file-level storage protocol that works over standard IP networks. ESXi hosts can mount an NFS share as a datastore, allowing multiple hosts to access the same file system simultaneously. In contrast, Fibre Channel and iSCSI are block-level protocols that present a LUN to the host, which must then be formatted with a file system like VMFS.

The Cisco Meeting Server (CMS) acts as a highly scalable and flexible Multipoint Control Unit (MCU), or conference bridge. Its primary function is to host audio and video meetings, allowing multiple participants using various endpoints (SIP, H.323, WebRTC) to join a single conference. Call control is typically handled by a CUCM.

The organization wants to use its existing third-party (HPE) servers and NetApp storage. The only Cisco-supported model that allows this is the 'UC on UCS Specs-based' model, which extends its rules to third-party hardware on the VMware HCL. This allows them to leverage their existing infrastructure while maintaining support for the Cisco UC applications. The BE7000H and TRC models require Cisco UCS hardware.