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Networks are at the core of global communication. The impact network changes have on network performance has been of concern to researchers. In various configurations, network performance has been evaluated using many methods. The paper presents findings of a network performance evaluation where multiple hardware routers were implemented on a test-bed and performance difference between the two versions...
Wireless internet has become popular in recent years due to the tremendous growth in the number of mobile computing devices and high demand for continuous network connectivity regardless of physical locations. In this paper, we investigate the effects of routing protocols on the performance of Transmission Control Protocol (TCP) variants in multi-hop wireless networks. Through simulations we study...
In this paper, we study the performance of active queue management algorithms for packet queueing in Internet routers in the presence of new versions of the TCP congestion control mechanism. In particular, we compare the performance of tail drop, adaptive RED, AVQ, PI, REM and AN-AQM queueing in four TCP cases: (i) the classic New Reno protocol, (ii) the Sack protocol, (iii) the Fack protocol, (iv)...
Last few decades has brought many fundamental changes to data communications and the Internet. Internet has its roots in a networking project started by ARPA which consisted of four computers. Now the Internet spans the globe, and has become the default communication mechanism for businesses and individuals. IPv4 addresses will soon be exhausted, which has initiated development of IPv6. The new IP...
TCP is an important communication protocol as more and more multimedia technologies are deployed in the Internet nowadays. However, existing TCP control mechanism has some shortcomings in supporting real-time streaming traffic. Although UDP can be used as an alternative to transmit real-time application data, it lacks congestion control. Introducing a new TCP-friendly protocol that supports the multimedia...
At present, the number of Internet subscribers accessing Internet through mobility terminal equipment and other new types is gradually increasing, which shows it's important to develop mobility management protocols in order to provide mobility support for the subscribers. Several protocols were proposed to support IP mobility in the IETF, such as MIPv6, HMIPv6, FMIPv6 and F-HMIPv6. Some performance...
The active queue management in Internet routers exploits the idea that an incoming packet can be dropped by the router even if there is some available buffering space in the router. Therefore, the router can send congestion signals to TCP before the actual congestion occurs, preventing queues and delays from growing too high. Many active queue management algorithms has been proposed till now. Unfortunately,...
TCP constitutes the principal protocol of the TCP/IP model transport stack. Today, TCP-Reno is the mainly deployed transport protocol on Internet. It defines a method of controlling congestion in networks with packet switching and particularly the Internet. In spite of the efforts made to resolve the congestion problem, this protocol continues to meet numerous of troubles in particular in networks...
Over the last decade, many fundamental changes have occurred in data communications and network infrastructure that will be shaping the future of information technology for years to come. This global network infrastructure, the Internet, is now at the core of communications for worldwide economy and individuals. Internet protocol (IP) v4 is the standard for the design and interconnection of networks...
A small network of computing devices that started as ARPANET project in early 1980s is now a worldwide network of devices for billions of users. This global network, the Internet, has become an integral part of worldwide economy and life of individuals. Internet Protocol (IP) v4 is the basic building block of the Internet and has served well, but it has limitations that hinder its growth. The solution...
Fundamental changes have occurred in data communications and network infrastructure that will be shaping the future of information technology for years to come. The global network infrastructure, the Internet, is now at the core of communications for worldwide economy and individuals. Internet Protocol (IP) v4 is the standard for the design and interconnection of networks today; however it has limitations...
Mobility of user devices connecting to the Internet is of major interest in today's research in networking. For users as well as for applications, network mobility should be transparent. Reliable transport protocols like TCP has served well the wired Internet where the packet losses are mainly due to congestion, but is not ready for mobile IP wired-cum-wireless environments where the significant packet...
Network mobility (NEMO) protocols can be used to manage aggregate mobility of multiple IP-enabled devices on-board a Low Earth Orbit satellite (a mobile network on-board). NEMO protocols enjoy several performance advantages, such as reduced signaling, increased manageability and conservation of satellite link bandwidth as compared to host mobility protocols for individual devices. In addition, NEMO...
TCP-based applications account for a majority of data traffic in the Internet; thus understanding and improving the performance of TCP over OBS network is critical. In this paper, we identify the ill-effects of implementing TCP over a hybrid network (IP-access and OBS-core). We purpose a Split- TCP approach for a hybrid IP-OBS network to improve TCP performance. We propose two Split-TCP approaches,...
TCP is the widely used transport protocol and is responsible for the transmission of around 90% of the Internet traffic. Algorithms like Slow Start, Congestion Avoidance, Fast Retransmit and Fast Recovery are the basis for different TCP versions. Tahoe and Reno are the TCP versions that use these algorithms. In this paper, we have compared the effect of random loss on TCP performances with different...
Ensuring that IP Security (IPSec) gateway meets its performance expectations is one of the most important objectives that IPSec gateway development team must face with. Only suitable validation approach may prove that IPSec gateway throughput is correct, Security Associationspsila adding/removing time is acceptable, IPSec gateway is capable of processing huge number of flows and IPSec rekeying works...
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