It is well known that the performance of a TCP flow is affected by its round-trip time (RTT), i.e., the elapsed time between the instant a packet is released by the source to the instant the corresponding ack is received by the source. The distribution of RTTs can dramatically affect not only the data rates realized by individual flows sharing a link but also the utilization of Internet links. ...

The continued growth of the web places ever increasing performance demands on web site front-end appliances. In many cases, these appliances have to forward network traffic to and from web servers at transport and application levels utilizing complete TCP/IP stack processing, which could easily make the front-end appliance a bottleneck for a web site. This paper describes four novel optimizatio...

This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract Recent analysis of potential attacks on core Internet infrastructure indicates an increased vulnerability of TCP connections to spurious resets (RSTs), sent with forged IP source addresses (spoofing). TCP has always been susceptible to...

At the IETF, there has recently been a number of proposals for separating the identifier and locator nature of IP addresses. Furthermore, many of these proposals aim to provide support for multi-addressing by making the fact that a host may have multiple parallel IP addresses invisible to the layers above. In this paper we discuss the potential consequences of such a change to congestion contro...

The present report deals with the modeling of the long-term throughput, a.k.a., send rate, of the Transmission Control Protocol (TCP) under the following assumptions. (i) We consider a single ‘infinite source’ using a network path from sender to receiver. (ii) Each TCP packet is randomly dropped with probability ; independently of previous drops or any other event/parameter. (iii) The – never c...

Most end devices are now equipped with multiple network interfaces. Applications can exploit all available interfaces and benefit from multipath transmission. Recently Multipath TCP (MPTCP) was proposed to implement multipath transmission at the transport layer and has attracted lots of attentions from academia and industry. However, MPTCP only supports TCP based applications and traffic rate a...

Many applications require fast data transfer over high speed and long distance networks. However, standard TCP fails to fully utilize the network capacity in high-speed and long distance networks due to its conservative congestion control (CC) algorithm. Some works have been proposed to improve the connection’s throughput by adopting more aggressive loss-based CC algorithms, which may severely ...

We introduce a novel mechanism for actively measuring available bandwidth along a network path. Instead of adding probe traffic to the network, the new mechanism exploits data packets transmitted in a TCP connection (inline measurement). We first introduce a new bandwidth measurement algorithm that can perform measurement estimates quickly and continuously and is suitable for inline measurement...

This paper presents a new TCP-based packet pair measurement approach for network path capacity estimation. It addresses some drawbacks other approaches still bear. In contrast to these, our approach uses an unmodified TCP sender and utilizes techniques to identify probing packets that were less influenced by cross traffic. These techniques are applied at the receiver side only. The concept is v...

It is well known that TCP experiences performance problems (unfairness and starvation) in multi-hop wireless networks. Such problems are often traced to the misbehavior of dynamic routing protocols in case of link failure. However, in this paper we show, through simulations, that unfairness and starvation of flows also take place with static routing; thus competition between TCP flows in a mult...