Abstract not found

The Internet has evolved greatly from its original incarnation. For instance, the vast majority of current Internet usage is data retrieval and service access, whereas the architecture was designed around host-to-host applications such as telnet and ftp. Moreover, the original Internet was a purely transparent carrier of packets, but now the various network stakeholders use middleboxes to improve security and accelerate applications. To adapt to these changes, we propose the Data-Oriented Network Architecture (DONA), which involves a clean-slate redesign of Internet naming and name resolution. Categories and Subject Descriptors C.2.5 [Computer-Communication Networks]: Local and Wide-

Intermediate network elements, such as network address translators (NATs), firewalls, and transparent caches are now commonplace. The usual reaction in the network architecture community to these so-called middleboxes is a combination of scorn (because they violate important architectural principles) and dismay (because these violations make the Internet less flexible). While we acknowledge these concerns, we also recognize that middleboxes have become an Internet fact of life for important reasons. To retain their functions while eliminating their dangerous side-effects, we propose an extension to the Internet architecture, called the Delegation-Oriented Architecture (DOA), that not only allows, but also facilitates, the deployment of middleboxes. DOA involves two relatively modest changes to the current architecture: (a) a set of references that are carried in packets and serve as persistent host identifiers and (b) a way to resolve these references to delegates chosen by the referenced host. 1

Abstract: The current Internet is at an impasse because new architectures cannot be deployed, or even adequately evaluated. This paper urges the community to confront this impasse, and suggests a way virtualization might be used to overcome it. In the process, we discuss the nature of architecture and the debate between purists and pluralists. 1.

It is accepted wisdom that the current Internet architecture conflates network locations and host identities, but there is no agreement on how a future architecture should distinguish the two. One could sidestep this quandary by routing directly on host identities themselves, and eliminating the need for network-layer protocols to include any mention of network location. The key to achieving this is the ability to route on flat labels. In this paper we take an initial stab at this challenge, proposing and analyzing our ROFL routing algorithm. While its scaling and efficiency properties are far from ideal, our results suggest that the idea of routing on flat labels cannot be immediately dismissed.

Abstract Online services often use IP addresses as client identifierswhen enforcing access-control decisions. The academic community has typically eschewed this approach, how-ever, due to the effect that NATs, proxies, and dynamic addressing have on a server's ability to identify individualclients. Yet, it is unclear to what extent these edge technolo-gies actually impact the utility of using IP addresses as client identifiers. This paper provides some insights intothis phenomenon. We do so by mapping out the size and extent of NATs and proxies, as well as characterizing thebehavior of dynamic addressing.

In today’s Internet, users can choose their local Internet service providers (ISPs), but once their packets have entered the network, they have little control over the overall routes their packets take. Giving a user the ability to choose between provider-level routes has the potential of fostering ISP competition to offer enhanced service and improving end-to-end performance and reliability. This paper presents the design and evaluation of a new Internet routing architecture (NIRA) that gives a user the ability to choose the sequence of providers his packets take. NIRA addresses a broad range of issues, including practical provider compensation, scalable route discovery, efficient route representation, fast route fail-over, and security. NIRA supports user choice without running a global link-state routing protocol. It breaks an end-to-end route into a sender part and a receiver part and uses address assignment to represent each part. A user can specify a route with only a source and a destination address, and switch routes by switching addresses. We evaluate NIRA using a combination of network measurement, simulation, and analysis. Our evaluation shows that NIRA supports user choice with low overhead.

Typically routing is either scalable but inflexible, such as current Internet routing, or flexible but unscalable, such as source routing with with per-flow route discovery. In this paper we argue that to achieve both flexibility and scalability, customized routing should be offered as a service by thirdparty providers. The logical separation of routing from forwarding allows different route selection mechanisms to coexist and to evolve over time as routing requirements change. 1

We present a comparative performance study of a wide selection of optimization techniques to enhance application performance in the context of wide-area wireless networks (WWANs). Unlike in traditional wired and wireless IPbased networks, applications running over WWAN cellular environments are significantly affected by the vagaries of the cellular wireless medium. Prior research has proposed and analyzed optimizations at individual layers of the protocol stack. In contrast, we introduce the first detailed experiment-based evaluation and comparison of all such optimization techniques in a commercial WWAN testbed. This paper, therefore, summarizes our experience in implementing and deploying an infrastructure to improve WWAN performance. The goals of this paper are: (1) to perform an accurate benchmark of application performance over such commercially deployed WWAN environments, (2) to implement and characterize the impact of various optimization techniques across different layers of the protocol stack, and (3) to quantify their interdependencies in realistic scenarios. Additionally, we discuss measurement pitfalls that we experienced and provide guidelines that may be useful for future experimentation in WWAN environments. 1.

The de-facto service architecture of today’s communication networks lacks a well-defined and coherent theoretical foundation. With layering as the only means for functional abstraction, the diversity of current technologies cannot be expressed consistently and analyzed properly. In this paper, we present an axiomatic formulation of fundamental mechanisms in communication networks. In particular, we reconcile the existing but somewhat fuzzy concepts of naming and addressing and present a consistent set of primitives that are sufficient to compose communication services. The long-term goal of this exercise is to better document, verify, evaluate, and eventually implement network services. 1