Technological enhancement in the communication industry has brought about rapid increase in the usage of mobile phones and other wireless devices. Mobile computing has contributed to an increase in productivity and efficiency on individuals and businesses. Millions of people across the globe use phones over radio links for communication purposes. The changing time witnessed greatest revolution in different generations of telecommunication system. The global system for mobile communication (GSM)...
1.1 Overview Network pioneers attempted to build multi-protocol networks in the early 1990s were faced with a lot of problems. Most of the protocols are running in enterprise network had no scalable routing protocols that enabled the network engineer to build reliable large networks. The grown-up and established routing protocols like RIP (Routing Information Protocol) or IGRP (Interior Gateway Routing Protocol) were reliable, slow and the newer up-and-coming routing protocol, like...
The IP layer provides a connectionless and unreliable delivery system. It considers each datagram independently of the others. Any association between datagram must be supplied by the higher layers. The IP layer supplies a checksum that includes its own header. The header includes the source and destination addresses. The IP layer handles routing through an Internet. It is also responsible for breaking up large datagram into smaller ones for transmission and reassembling them at the other...
Recent researches and advancement in the wireless communication and electronics field have led to the development of low-cost, low power sensor nodes which are small in size and can communicate with each other even at short distances. These small size sensor nodes, which consist of sensing, communicating and data processing capabilities, give the idea of sensor networks. Wireless sensor networks represent great improvement over traditional networks. A sensor network is composed of large number...
The software engineers and designers always try to develop reliable and consistent software but the behavior of software is often a surprise for them. Mostly software systems fail and can not fulfill the requirements, there are many reasons of their failure but most of them fail due to incomplete and ambiguous requirement specification, which are hardly difficult to handle by using traditional software development process. Formal methods are used as an emerging technology which handles these...
Introduction The Unified Modeling Language (UML) is a graphical language for visualizing, specifying, constructing and documenting the artifacts of a software-intensive system. The UML gives us a standard way to write a system's blue prints like classes written in a specific programming language, database schemas, and reusable software components. In the Unified Modeling Language, a component diagram depicts how a software system is split up into components and shows the dependencies...
Social Engineering it can be defined as a collection of techniques used to manipulate people into performing actions or revealing confidential information or Access to the system is not authorized to enter or to obtain information through deception or snooping on the network or to spy on the production line or impersonate or disable the system or network. it similar to confidence trick the term typically applies to trickery for information gathering or computer system access . Introduction :...
Abstract: Many people depend on websites to perform their daily work. In spite of the rigorous testing of the websites for security flaws, some flaws still exist that prevent the secured usage. Many have discussed on infected websites and how to maintain user's privacy. The prevalence of user visible security design flaws will be examined, by observing several websites. After examining the flaws, steps to overcome security flaws will be developed in this paper. The results will give a brief...
Welcome to the chapter, Safeguarding a Computer and Recovering from Disaster. This chapter describes methods to protect a computer and take preventive measures in case of a disaster. In this chapter, you will learn to: Describe various recovery techniques in Windows XP Professional Explain Windows XP Professional boot process Configure advanced startup options Describe the backup utility Explain Automated System Recovery (ASR)14.1 IntroductionImagine a situation where a computer that does not...
This weakness may be caused by software bugs and flaws in the design of the system , The reason some weaknesses to the wrong data entry , Where that often allows direct execution of commands or language SQL statements , Often allows Weaknesses an attacker to circumvent the program to bypass screening access . There are a number of weaknesses that your computer or your network vulnerable : 1 . Validation error such as data entry errors resulting from code format text codes . 2 . Deal wrong with...