Week 5 Notes 2 13 17 What is TCP IP Back in the days o TV was able to pick up a signal that emanated fm a station somewhere that broadcasted the signal on a bubble that anyone in the range can watch Internet traffic o Has to be directly routed to the correct place o Online data has to know where it s going TCP IP o Transmission control protocol and internet protocol o Think of it as a cake or club sandwich Conceptualized in layers made up of computer code Top layer application layer o Progs like web browser directly interact w it HTTP or SMTP for emails Next layer transport layer o Where TCP UDP is UDP faster useful for low latency apps like games o After the app gets data fm prog it talks to the transport thru a PORT Ea port can be assigned to a diff protocol in the app layer so that TCP knows where the data is coming fm Ex in browser most goes to port 80 Once TCP gets data it chops it up in packets so that they can be disposed of it so no one can find it so they can indiv take the quickest route over the internet to where they re going To make sure receiving comp can put the packets back together properly TCP slaps a header onto ea packet that contains instructions on what order to reassemble the packets into as well as they were checking info so that the receiving comp knows the packet data arrives w o any mishaps After packets are pushed onto internet layer which uses IP to attach both the origin destine IP addresses so packet knows where it s going Data is sent thru the final network layer that handles the packets so that they go to the right phys machine converting the data into electrical impulses that will pass thru the proverbial series of tubes Packet switching makes the internet faster o Allows ea packet to indiv avoid congestion that would occur if all data traveled along the same route o Streamlines things further bc it can deal w packets fm all comp apps so that the browser game doesn t have to do it by itself o Didn t save us from blocky vids Modems o Telling the sites we visit where we re visiting them from and tunnel bear VPN lets you hide that data Up to 20 countries Tales of the Old Wild Web by Michael Socolow First interaction w the web o surfing Music movies games and vids flowed across our screens Occasional unobtrusive ads All we need was a comp decent cnxn curiosity o The web in the future Place they are permanently logged in under their real names Sphere of retail Webs anonymity wont matter much Wont understand ppl lose jobs by posing inanities on f Appropriate boundaries of behavior on social media will be taught to them by schools and parents o a pivotal moment in the Web s evolution Over the past yr many websites blogs and providers have started to meter and restrict content to enhance revenue Slow growth of online ads rev enhancement is now critical to survival Web starting to feel constricted and channeled as ea New gate and tollbooth appears Ex Blogs launched pay models venerable pop sites consider new ways of monetizing content Everyone views the transition as inevitable whether they believe it s progressive regressive o Every communication tech herds channels networks packages and manipulates its users Audiences are unaware of the process as they are narcotized by dazzling content Miss machinations behind the curtain In exchange for free stuff f acct agree to allow their consciousness and identities be packaged and sold by media corporations Basis of the Am system of commercialized communications o Alert us to the pattern of restriction structuring the historical trajectory of all Am mass communications Restrictions o May involve govt l regs or result fm the operations of commercial entities o Am audiences generally accept when corporate titans sold them on the benefits of restriction o Innovative efficiencies are always promised when channeling freedom Every generation recalls the media of its youth o No golden age of the web any more than there was a golden age for TV TV s celebrate 3 black and white channels w little audience empowerment or interactivity Today it s far more visually stimulating and writing far more complex and engaging o Media envmt is always improving and deteriorating at the same time o Purity of either decline or progress ignores the nuances of transition Future gens cant experience what we did Early days of the wild web o Web offered unlimited creativity vitriolic outbursts mystery intrigue o Accessed only on a desk work or home o Much was crap primitive graphics stilted animation vied for attention house racist kooks and conspiracy theorist o Volume of uncollected unorganized and unverified info could both dazzle overwhelm o Big prob was TRUST Credibility and reliability were rare difficult to establish o Relative freedom was a prob Early web visionaries understood how overwhelmed the uninitiated would be Timothy Berners Lee said so much data on web pages that a market for tolls that reverse engineer that process Problem he said was REVERSE ENGINEERING ran directly counter to Web s purpose o Universality and Freedom Came at a price Users traded republished copywrited materials Some created forums Pornography Govt req d more surveillance to curb lawlessness Corporations became more vigilant bc piracy identity theft How China is Changing Your Internet by The NY Times China has become a guide to the future o Internet is more like an intranet walled off fm the western world bc filters blocks the great firewall blocks anything the communist party doesn t want no f twitter or google o Chinese copycats Different but similar apps for china Things have started to shift o Some features are so amazing that western apps are trying to copy it o EX WECHAT It does everything for you SUPER APP All apps in one Even have services that we don t have apps for Not the variety of things that makes it powerful it s the fact that it s all in one app WHY does it matter Do all these things on an app but never leaves it None of them HAVE LEFT THE APP Virality the tendency of an image video or piece of info to be circulated rapidly and widely fm 1 internet user to another the quality or fact of being viral o o All sorts of company and prods can go viral In china over 700 mill People on network Collect a lot of information about YOU For advertisers it s a miracle Problem all data is info Chinese comps are forced to share w the Chinese govt which have a long history about abuse human rights MATTERS BC starting to see western tech comps trying to