Broadly speaking, a computer firewall is a software program that prevents unauthorized access to or from a private network. Firewalls are tools that can be used to enhance the security of computers connected to a network, such as LAN or the Internet. They are an integral part of a comprehensive security framework for your network. Routers and switches are both computer networking devices that allow one or more computers to be connected to other computers, networked devices, or to other networks. ... The term layer 3 switches often is used interchangeably with the router, but the switch is really a general term without a rigorous technical definition. Personalized practice interviews with senior industry professionals from multinationals like Deloitte, Facebook, Google, Capgemini, Schlumberger, Shell, ABB, Mahindra, Walmart, etc. InterviewBuddy Here are some details on the practice interviews: 1. Completely online, you can attend from your dorm or college or your office 2. Video Resume that results in tailoring practice interview sessions 3. Auto recording of the entire interview for self-review & improvement 4. Comprehensive Interview Performance Report with different metrics of your performance and feedback to improve Sign up now at: www.interviewbuddy.in