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 TitleDate AddedCompany
whitepaper Cisco IPv6 Solutions2007-01-01 Cisco Systems
  The continuous growth of the global Internet requires that its overall architecture evolve to accommodate the new technologies that support the growing numbers of users, applications, appliances, and services. Internet Protocol version 6 (IPv6) is designed to meet these requirements and enable a global environment where the addressing rules of the network are again transparent to the applications. This paper describes the Cisco position and details current and future IPv6 support across Cisco strategic product families.

Tags: Web Protocols		   
whitepaper Generating New Revenue With Fixed Mobile Convergence2007-01-01 Cisco Systems
  This paper first defines the concept of FMC with regard to service provider-managed Cisco Unified Wireless Communication service. It then discusses expertise from the Cisco Internet Business Solutions Group (IBSG) - the global strategic consulting arm of Cisco - regarding; the business factors behind the move by business end users and service providers to FMC and; the service provider business case for offering managed wireless IP communication services. In addition, the paper summarizes the Cisco Unified Wireless Network solution and introduces complementary services from Cisco, including strategic consulting as well as technical and marketing resources.

Tags: Mobile - Wireless Communications		   
whitepaper Cost Comparison Between IP-Over-DWDM and Other Core Transport Architectures2007-01-01 Cisco Systems
  Cisco recommends an alternative architecture called IP over DWDM, which eliminates the need for Optical to Electrical to Optical (OEO) conversion equipment between the router and the optical layer (including both transponders and SONET gear) by combining DWDM router interfaces with an optically switched DWDM layer. This streamlined core architecture improves the flexibility, power efficiency, and reliability of the core network, while providing significant operating and capital cost savings.

Tags: DWDM, IP Technologies		   
whitepaper Failures in a Hybrid Content Blocking System2007-01-01 University of Cambridge
  Three main methods of content blocking are used on the Internet: blocking routes to particular IP addresses, blocking specific URLs in a proxy cache or firewall, and providing invalid data for DNS lookups. The mechanisms have different accuracy/cost trade-offs. This paper examines a hybrid, two-stage system that redirects traffic that might need to be blocked to a proxy cache, which then takes the final decision. This promises an accurate system at a relatively low cost. A British ISP has deployed such a system to prevent access to child pornography.

Tags: ISPs, IP Technologies		   
whitepaper TCP Pacing Revisited2007-01-01 California Institute of Technology
  TCP pacing promises to reduce burstiness of TCP traffic and alleviate the impact of under-buffered routers and switches on flow throughput. However, current research literatures have not always agreed on the overall benefits of pacing. This paper re-examines the benefits and drawbacks of TCP pacing in light of new TCP variants, new application requirements, and trends in router technologies. It was found that pacing primarily has three effects: reduced burstiness of traffic, increased synchronization among the rows and fragmented SACK blocks in a flow. The paper analysis how these factors play out for different TCP implementations (Reno, NewReno, SACK, FACK) and new high-speed TCP protocols (BIC-TCP and FAST).

Tags: IP Technologies		   
whitepaper TCP Congestion Control With a Misbehaving Receiver2007-01-01 University of Washington
  This paper explores the operation of TCP congestion control when the receiver can misbehave, as might occur with a greedy Web client. The paper first demonstrates that there are simple attacks that allow a misbehaving receiver to drive a standard TCP sender arbitrarily fast, without losing end-to-end reliability. These attacks are widely applicable because they stem from the sender behavior specified in RFC 2581 rather than implementation bugs. Then it shows that it is possible to modify TCP to eliminate this undesirable behavior entirely, without requiring assumptions of any kind about receiver behavior.

Tags: IP Technologies		   
whitepaper A Model for TCP-Based Video Streaming2007-01-01 University of Massachusetts
  TCP is widely used by commercial video streaming systems. When a packet has not arrived by its playback time, a typical practice in this commercial system is that the client simply stops and waits for this packet, and then resumes playback. This stop-and-wait playout strategy is easy to implement. However, stopping playout due to late packet arrivals renders the viewing experience unsatisfactory. A continuous playout strategy, i.e., continuing playout regardless of late packet arrivals, also leads to unsatisfactory viewing experience, since late packet arrivals cause glitches in the playback. This paper develops discrete-time Markov models to evaluate the performance of live and stored video streaming using TCP.

Tags: IP Technologies, Streaming Media		   
whitepaper Extending the IP Internet Through Address Reuse2007-01-01 Massachusetts Institute of Technology
  The two most compelling problems facing the IP Internet are IP address depletion and scaling in routing. This paper discusses the characteristics of one of the proposed solutions-address reuse. The solution is to place Network Address Translators (Nat) at the borders of stub domains. Each Nat box has a small pool of globally unique IP addresses that are dynamically assigned to IP flows going through Nat. The dynamic assignment is coordinated with Domain Name Server operation. The IP addresses inside the stub domain are not globally unique-they are reused in other domains, thus solving the address depletion problem. The pool of IP addresses in Nat is from a subnet administered by the regional backbone, thus solving the scaling problem.

Tags: IP Technologies		   
whitepaper TCP Meets Mobile Code2007-01-01 University of Washington
  This paper argues that transport protocols such as TCP provide a rare domain in which protocol extensibility by untrusted parties is both valuable and practical. TCP continues to be refined despite more than two decades of progress and the difficulties due to deployment delays and backwards-compatibility are well-known. Remote extensibility, by which a host can ship the transport protocol code and dynamically load it on another node in the network on a per-connection basis, directly tackles both of these problems. At the same time, the unicast transport protocol domain is much narrower than other domains that use mobile code, such as active networking, which helps to make extensibility feasible.

Tags: IP Technologies, Mobile - Wireless Communications		   
whitepaper A Look Back at "Security Problems in the TCP/IP Protocol Suite"2007-01-01 Association for Computing Machinery
  Earlier, the author wrote a paper on security problems in the TCP/IP protocol suite. In particular, he focused on protocol-level issues, rather than implementation flaws. It is instructive to look back at that paper, to see where his focus and predictions were accurate, where he was wrong, and where dangers have yet to happen. This is a reprint of the original paper, with added commentary.

Tags: IP Technologies, Network Security		   


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