Informatics Publishing Limited

Mandeep Kaur ¹, Abhinav Bhandari ¹

Affiliations
1 Department of Computer Engineering, Punjabi University, Patiala, Punjab, IN

Abstract

In today's modern era of high-speed multimedia transmissions congestion on the network is eminent. By the need of time a lot of variants have been proposed by the researchers to cope with the problem of congestion. Every variant being proposed have their pros and corns for one or the other scenario. In our study we have considered the three scenarios that are Access-link, Dial-up and Geo satellite Scenario. We have taken up some parameters of TCP Variants to be compared for these scenarios in order to provide a comparison for the use of a particular variant in a specified scenario. The purpose of this paper is to analyze and compare the performance parameters of TCP variants for three different scenarios.

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Parneet Kaur ¹, Abhinav Bhandari ¹

Affiliations
1 Department of Computer Engineering, Punjabi University, Patiala, Punjab, IN

Abstract

In recent years, the online services and web applications offered by the Internet have become very popular. But Distributed Denial of Service (DDoS) attacks is atrocious threat to the application amenities. DDoS attacks are typically carried out at the network-layer and are easily defeated by the current defence mechanisms. Nowadays, DDoS attacks launched against the application-layer are most devastating in nature and are not detected by the network-layer defence methods. Therefore, detecting DDoS attacks at the application-layer has become a serious problem for the availability of application services. In this paper, a current scenario of the application-layer DDoS (ALDDoS) attacks has been presented along with its defence mechanisms. Defence mechanisms can be effective only if the attack signatures are represented in irregular user behavior.

Keywords

DDoS Attacks, ALDDoS Attacks, Defence Mechanisms.

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