All Types of Competitive Exam Books, Exam Materials, Educational Apps
In IP networks, routing is based on stationary IP addresses, similar to how a postal letter is delivered to the fixed address on the envelope. A device on a network is reachable through normal IP routing by the IP address it is assigned on the network
The problem occurs when a device roams away from its home network and is no longer reachable using normal IP routing. This results in the active sessions of the device being terminated. Mobile IP was created to enable users to keep the same IP address while traveling to a different network (which may even be on a different wireless operator), thus ensuring that a roaming individual could continue communication without sessions or connections being dropped. Because the mobility functions of Mobile IP are performed at the network layer rather than the physical layer, the mobile device can span different types of wireless and wireline networks while maintaining connections and ongoing applications.
The smart card is one of the latest additions to the world of information technology (IT). The size of a credit card, it has an embedded silicon chip that enables it to store data and communicate via a reader with a workstation or network. The chip also contains advanced security features that protect the card’s data.
Smart cards come in two varieties: microprocessor and memory. Memory cards simply store data and can be viewed as small floppy disks with optional security. Memory cards depend on the security of a card reader for their processing. A microprocessor card can add, delete, and manipulate information in its memory on the card. It is like a miniature computer with an input and output port, operating system, and hard disk with built-in security features.
A computer virus is a coded program that is written in Assembly or a system programming language such as ‘C’ to deliberately gain entry into a host system and modify existing programs and/or perform a series of actions, without user consent. we would like to throw light on some of the unturned stones of the world of virus. We would start from the history of the virus i.e. who created the first virus, for what purpose and how it affects the computer.
