Welcome!

Related Topics: SDN Journal, Java IoT, Microservices Expo, Linux Containers, Containers Expo Blog

SDN Journal: Blog Feed Post

The Evolution of TCP

Like everything about the Internet, TCP keeps on changing

In 1974 a specification was developed that would, eventually, launch what we know of as "The Internet." That specification was TCP and though it is often overshadowed by HTTP as the spark that lit the fire under the Internet, without TCP HTTP wouldn't have a (transport) leg to stand on.

Still, it would take 10 years before the Internet (all 1000 hosts of it) converted en masse to using TCP/IP for its messaging. Once that adoption had occurred, it was a much shorter leap for the development of HTTP to occur and then, well, your refrigerator or toaster can probably tell you the rest at this point.

That makes TCP 40 years old this year. And despite the old adage you can't teach an old dog new tricks, TCP has continued to evolve right along with the needs of the applications that rely so heavily on its reliable transport mechanism.

Consider the additions, modifications, enhancements and changes that have been made just in the past 20 years or so. In total, there are well over 100 different RFCs associated with TCP that offer ways to improve performance, or reliability or support new technology like mobile networks and devices.

evolution of tcp

Like SSL and even HTTP, TCP must continue to evolve. Unlike the Internet in 1984 which boasted a mere 1000 hosts, the ISC domain survey puts the number of hosts in Jan 2013 at well over 1 billion. That means to move to some other transport protocol we'd have to coordinate, well, more than seems humanly possible. Especially given that doesn't count the switch required on the client side - which numbers in the 2.4 billion range according to Internet World Stats, which tracks growth of Internet users world wide.

What this means, practically, is that TCP must evolve because we can't just move to something else. Not without a long term transition plan and we see how well that's working for the move to IPv6, despite the depletion of IPv4 addresses.

So it shouldn't be a surprise when new, TCP-related technologies like MPTCP (Multipath TCP) are introduced to address challenges that continue to crop up as new devices, networks and applications pop up like dandelions in your front yard. Nor should we be surprised when support for such protocols, like SPDY before it, are offered to the market with a transitional approach, i.e. gateways and dual-stack supporting proxies.

The only real way to support the use of what would otherwise be a disruptive technology without disrupting the billions of hosts and users that communicate each and every day is to provide strategic transitional protocol points of control that enable transparent and (one hopes) seamless support as hosts and devices begin to support it.

TCP isn't going anywhere, it's too critical to the entire Internet at this point. But that doesn't mean it's static or inflexible. It is constantly evolving to meet the needs of the next generation of devices, networks and applications that rely upon it.

Read the original blog entry...

More Stories By Lori MacVittie

Lori MacVittie is responsible for education and evangelism of application services available across F5’s entire product suite. Her role includes authorship of technical materials and participation in a number of community-based forums and industry standards organizations, among other efforts. MacVittie has extensive programming experience as an application architect, as well as network and systems development and administration expertise. Prior to joining F5, MacVittie was an award-winning Senior Technology Editor at Network Computing Magazine, where she conducted product research and evaluation focused on integration with application and network architectures, and authored articles on a variety of topics aimed at IT professionals. Her most recent area of focus included SOA-related products and architectures. She holds a B.S. in Information and Computing Science from the University of Wisconsin at Green Bay, and an M.S. in Computer Science from Nova Southeastern University.

Latest Stories
Recognizing the need to identify and validate information security professionals’ competency in securing cloud services, the two leading membership organizations focused on cloud and information security, the Cloud Security Alliance (CSA) and (ISC)^2, joined together to develop an international cloud security credential that reflects the most current and comprehensive best practices for securing and optimizing cloud computing environments.
DevOps is not just last year’s buzzword. Companies with DevOps practices are 2.5x more likely to exceed profitability, market share, and productivity goals. But how do you enable high performance? What can you do right now to start? Find out from DevOps experts including Gene Kim, co-author of "The Phoenix Project," and the Dynatrace Center of Excellence.
Predictive analytics tools monitor, report, and troubleshoot in order to make proactive decisions about the health, performance, and utilization of storage. Most enterprises combine cloud and on-premise storage, resulting in blended environments of physical, virtual, cloud, and other platforms, which justifies more sophisticated storage analytics. In his session at 18th Cloud Expo, Peter McCallum, Vice President of Datacenter Solutions at FalconStor, will discuss using predictive analytics to ...
Silver Spring Networks, Inc. (NYSE: SSNI) extended its Internet of Things technology platform with performance enhancements to Gen5 – its fifth generation critical infrastructure networking platform. Already delivering nearly 23 million devices on five continents as one of the leading networking providers in the market, Silver Spring announced it is doubling the maximum speed of its Gen5 network to up to 2.4 Mbps, increasing computational performance by 10x, supporting simultaneous mesh communic...
Eighty percent of a data scientist’s time is spent gathering and cleaning up data, and 80% of all data is unstructured and almost never analyzed. Cognitive computing, in combination with Big Data, is changing the equation by creating data reservoirs and using natural language processing to enable analysis of unstructured data sources. This is impacting every aspect of the analytics profession from how data is mined (and by whom) to how it is delivered. This is not some futuristic vision: it's ha...
The cloud promises new levels of agility and cost-savings for Big Data, data warehousing and analytics. But it’s challenging to understand all the options – from IaaS and PaaS to newer services like HaaS (Hadoop as a Service) and BDaaS (Big Data as a Service). In her session at @BigDataExpo at @ThingsExpo, Hannah Smalltree, a director at Cazena, will provide an educational overview of emerging “as-a-service” options for Big Data in the cloud. This is critical background for IT and data profes...
Father business cycles and digital consumers are forcing enterprises to respond faster to customer needs and competitive demands. Successful integration of DevOps and Agile development will be key for business success in today’s digital economy. In his session at DevOps Summit, Pradeep Prabhu, Co-Founder & CEO of Cloudmunch, covered the critical practices that enterprises should consider to seamlessly integrate Agile and DevOps processes, barriers to implementing this in the enterprise, and pr...
The principles behind DevOps are not new - for decades people have been automating system administration and decreasing the time to deploy apps and perform other management tasks. However, only recently did we see the tools and the will necessary to share the benefits and power of automation with a wider circle of people. In his session at DevOps Summit, Bernard Sanders, Chief Technology Officer at CloudBolt Software, explored the latest tools including Puppet, Chef, Docker, and CMPs needed to...
Sensors and effectors of IoT are solving problems in new ways, but small businesses have been slow to join the quantified world. They’ll need information from IoT using applications as varied as the businesses themselves. In his session at @ThingsExpo, Roger Meike, Distinguished Engineer, Director of Technology Innovation at Intuit, showed how IoT manufacturers can use open standards, public APIs and custom apps to enable the Quantified Small Business. He used a Raspberry Pi to connect sensors...
Let’s face it, embracing new storage technologies, capabilities and upgrading to new hardware often adds complexity and increases costs. In his session at 18th Cloud Expo, Seth Oxenhorn, Vice President of Business Development & Alliances at FalconStor, will discuss how a truly heterogeneous software-defined storage approach can add value to legacy platforms and heterogeneous environments. The result reduces complexity, significantly lowers cost, and provides IT organizations with improved effi...
It's easy to assume that your app will run on a fast and reliable network. The reality for your app's users, though, is often a slow, unreliable network with spotty coverage. What happens when the network doesn't work, or when the device is in airplane mode? You get unhappy, frustrated users. An offline-first app is an app that works, without error, when there is no network connection.
Data-as-a-Service is the complete package for the transformation of raw data into meaningful data assets and the delivery of those data assets. In her session at 18th Cloud Expo, Lakshmi Randall, an industry expert, analyst and strategist, will address: What is DaaS (Data-as-a-Service)? Challenges addressed by DaaS Vendors that are enabling DaaS Architecture options for DaaS
One of the bewildering things about DevOps is integrating the massive toolchain including the dozens of new tools that seem to crop up every year. Part of DevOps is Continuous Delivery and having a complex toolchain can add additional integration and setup to your developer environment. In his session at @DevOpsSummit at 18th Cloud Expo, Miko Matsumura, Chief Marketing Officer of Gradle Inc., will discuss which tools to use in a developer stack, how to provision the toolchain to minimize onboa...
SYS-CON Events announced today that Catchpoint Systems, Inc., a provider of innovative web and infrastructure monitoring solutions, has been named “Silver Sponsor” of SYS-CON's DevOps Summit at 18th Cloud Expo New York, which will take place June 7-9, 2016, at the Javits Center in New York City, NY. Catchpoint is a leading Digital Performance Analytics company that provides unparalleled insight into customer-critical services to help consistently deliver an amazing customer experience. Designed...
Companies can harness IoT and predictive analytics to sustain business continuity; predict and manage site performance during emergencies; minimize expensive reactive maintenance; and forecast equipment and maintenance budgets and expenditures. Providing cost-effective, uninterrupted service is challenging, particularly for organizations with geographically dispersed operations.