connection between two or more people residing in separate locations for the purpose of communication. At its simplest, video conferencing provides transmission of static images and text between two locations. It provides transmission of full-motion video images and high-quality audio between multiple locations. For example, a point-to-point (two- person) video conferencing system works much like a video telephone.
Each participant has a video camera, microphone and speakers mounted on his or her computer. As the two participants speak to one another, their voices are carried over the network and delivered to the other's speakers and whatever images appear in front of the video camera appear in a window on the other participant's monitor. Multipoint videoconferencing allows three or more participants to sit in a virtual conference room and communicate as if they were sitting right next to each other. .
. Network Security Concepts . . .Cyber Law Cyber law is the part of the overall legal system that deals with the Internet, cyberspace, and their respective legal issues.
Cyber law covers a fairly broad area including freedom of expression, access to and usage of the Internet and online privacy. Cyber law has been referred to as the Law of the Internet. Figure . Cisco Hardware Firewall A firewall is a network security system, either hardware- or software-based, that uses rules to control incoming and outgoing network traffic.
A firewall acts as a barrier between a trusted network and an untrusted network. Cookies Cookies are small files which are stored on a user's computer. They are designed to hold a modest amount of data specific to a particular client and website, and can be accessed either by the web server or the client computer. Hacking Computer hacking refers to the practice of modifying or altering computer software and hardware to accomplish a goal that is considered to be outside of the creator's original objective.
Those individuals who engage in computer hacking activities are typically referred to as “hackers.” Crackers A cracker is someone who breaks into someone else's computer system, often on a network; bypasses passwords or licenses in computer programs; or