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whitepaper The concepts of detecting and monitoring faults in a self-healing environment are examined. The Nagios faultdetection system is evaluated and its self-healing capabilities researched. This paper outlines possibilities of interconnecting Nagios with...
[06 May 2008]
whitepaper NAT/Firewall systems are very widely utilized in today's network environments, such as intranets and the Internet. Together with many security enhancements, however, the use of NATs/Firewalls has raised a number of new issues and problems.
[11 Apr 2008]
whitepaper Firewalls are one key factor in network performance. If they can't process their rules fast enough then the whole network slows down. Firewalls are also required part in every network so special attention must paid to their packet matching...
[11 Apr 2008]
whitepaper This paper identifies usability challenges presented by internetworking multiple homes, with a special focus on, home network firewall management. The homes nowadays have an internet connection and multiple computers more and more often.
[11 Apr 2008]
News Jari Honko, analyst with eQ Bank in Helsinki, said: "The volume in the high end of the market could be somewhat thinner, but this will not be dramatically visible in the overall market volume. A continuing mobile phone boom in emerging markets in...
[01 Apr 2008]
whitepaper The City Council of the City of Helsinki provides a variety of governmental services for the approximately 500,000 inhabitants of Helsinki, Finland. To protect its network from security threats such as malware and intruders, the City of Helsinki...
[23 Mar 2008]
whitepaper Helsinki-based Rautaruukki Corporation supplies metal-based components and systems to the construction and mechanical-engineering industries. It provides items as various as pipes, beams, rainwater systems, guardrails, and hot-rolled steel for ships.
[19 Feb 2008]
whitepaper The Finnish Mutual Insurance Company Pension Fennia - headquartered in Helsinki ? Pension Fennia had been using a traditional PBX-based telephony switch, but the system's capacity was no longer sufficient for the company's needs.
[08 Feb 2008]
whitepaper Helsinki, Finland - based Veritas was facing a problem all too common for today's businesses. The company was using a range of traditional enterprise telephony systems that no longer addressed their business needs.
[08 Feb 2008]
whitepaper The Transmission Control Protocol (TCP) is a widely used transport layer protocol in the Internet. TCP provides reliable, end-to-end connections over the Internet. Kri04]. TCP is tuned to perform well in traditional networks where packet loss...
[14 Jan 2008]
whitepaper The Transmission Control Protocol (TCP) is efficient on wired networks, but provides poor performance on satellite networks due to the specific characteristics of satellite links. This paper presents the experiments results for a combined approach...
[14 Jan 2008]
whitepaper Delays on Internet paths, especially including wireless links, can be highly variable. On the other hand, a current trend for modern TCPs is to deploy a fine-grain retransmission timer with a lower minimum timeout value than 1 s suggested by RFC2988.
[14 Jan 2008]
whitepaper Wireless networks are a significant part of the Internet. Unfortunately, TCP performance degrades over wireless links where packet error rates are high due to varying wireless channel conditions. TCP interprets a packet loss as a sign of congestion...
[14 Jan 2008]
whitepaper The Transmission Control Protocol (TCP) [POS81] is a key transport protocol in the Internet. Two phases can be distinguished in a TCP connection, called Slow-Start and Congestion Avoidance [RFC2001]. In high speed networks, Standard TCP experiences...
[14 Jan 2008]
whitepaper Spurious TCP Retransmission TimeOuts (RTOs) have been reported to be a problem on network paths involving links that are prone to sudden delays due to various reasons. Especially many wireless network technologies contain such links.
[14 Jan 2008]
whitepaper Processor sharing (PS) models for TCP behavior nicely capture the bandwidth sharing and statistical multiplexing effect of TCP flows on the flow level. However, these 'rough' models do not provide insight into the impact of packet-level parameters...
[14 Jan 2008]
whitepaper This paper studies TCP performance focusing on the mean flow transfer delay and the average number of concurrent flows in the system. This is done for a dynamic population of users, rather than a static number of permanent flows.
[14 Jan 2008]
whitepaper Perhaps the most significant new development in data communication of the time is the TCP/IP protocol, which offers the first worldwide accepted standard of data transmission between computer systems.
[14 Jan 2008]
whitepaper The TCP transport protocol has several well-known problems when used in networks with wireless links. One approach to mitigating these problems is to insert a proxy at the edge of the fixed network between the wireless and regular parts of a...
[14 Jan 2008]
whitepaper Wireless networks widely used in Internet have high error rates. Transmission Control Protocol (TCP) originally designed for wired links needs for improving its performance over wireless links. In other words congestion avoidance approach is not...
[14 Jan 2008]
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