The document discusses five essentials for implementing bring your own device (BYOD) in a business: unified network access, security and remote access, identity and policy management, applications management, and devices. It provides an overview of Cisco products and services that can help deliver flexibility and control in a BYOD environment, including tools for network access, security, identity management, and mobility applications. The document also outlines strategies for onboarding user devices and maintaining control over resource access on personal and corporate-owned devices.