Ethernet Quotes

Ethernet, the technologies developed by Bob Metcalfe

Bob Metcalfe created a way to use coaxial cable (the type that plugs into cable TV boxes) to create a high-bandwidth system that he named “Ethernet.

I have conducted experiments using techniques that used to be fairly effective—knocking over the French press, unraveling their shoddy knitting, chewing the covers of every book in the library, shitting on pillows, shredding the couch, eating all the Ethernet snakes, and pissing all over bed blanket—but they seem to no longer be concerned. Admittedly, I’m impressed. I respect the negligible number of shits currently being given. Case in point: one of my Mediocre Servants left her arm in the living room, which I believe speaks to their general ineptitude. I played with it momentarily, but found its pungency off-putting and resumed licking my anus.

The fact that we are still sitting on and depending on technical protocols nearly a half century old is a testament to the genius of those who invented everything from such inventions, protocols and standards like Ethernet to personal computers that were more than just circuit boards for geeks, but actually had small GUI interfaces, as well as connected devices such as a mouse and keyboard.

Well, the club is open until three in the morning and she works every day. So, by the time she gets home…” “I get the picture,” I said. Though in fact, it was a little hard to imagine Harry with an attachment that didn’t have an Ethernet cable and a mouse. He was an introverted, socially stunted guy, with no contacts I knew of outside of his day job, which he kept at arm’s length in any event, and me. Conditions that had always made him useful.

Table of Content Chapter 1 - Basic Networking Elements 1) Network Types 2) Network Topologies 3) Network Components A. END DEVICES & MEANS FOR TRANSMISSION B. SWITCH C. ROUTER 4) How can we represent (or “draw”) a network ? 5) How computers communicate over the Internet ? Chapter 2 – Switches, Ethernet and MAC addresses What’s Ethernet ? Chapter 3 – Routers, IPv4 & IPv6 addresses Basic Routing concepts The IPv4 Protocol IPv4 Classes Public IP vs Private IP Configuring an IP address on Windows 7/8/10 The IPv6 Protocol Chapter 4 – TCP, UDP, Ports and Network Applications 1) TCP and UDP 2) Ports 3) Network Applications Chapter 5 - Cisco IOS & Intro to the CLI Introduction to the CLI - Basic Router Configurations LAB #1

device may begin retransmitting a frame before it has finished receiving that frame. With Ethernet frames, for example, the destination address is the first field in the header. Once this has been read, the out interface is known and transmission can begin even though much of the original frame is still being received. Devices that use this scheme are called cut-through devices.

I have a cellphone I rarely use. I use a wired ethernet computer to video chat and email family and friends.

Accelerating Technological Advancement Two “laws” help explain the extraordinary changes wrought by the global adoption of the internet. The first is Moore’s Law, named for Gordon Moore, an Intel cofounder. In the 1960s, he observed that the number of transistors that could be squeezed into a single chip was increasing at a predictable rate—doubling about every eighteen months. Thanks to billions of dollars in R&D and engineering investment, that rate of improvement has held ever since. The second law is named after Bob Metcalfe, the inventor of Ethernet, one of the protocols foundational to the internet. Metcalfe posited that the value of a network is equal to the number of connections between users, not just the number of users. Bigger is better, and better, and better. These laws help us quantify something we can see in our online experience: both the power of our devices and the value of the network they’re attached to are millions of times greater than they were at the dawn of the internet era. Plotting this growth reveals an interesting twist, however. For the past thirty years, the value of the internet as described by Metcalfe’s Law has increased more than processing power has improved. But as internet penetration slows, so does the rate of increase in the value of the internet. Meanwhile, Moore’s Law chugs along, suggesting that we may be approaching an inflection point, when changes to our online experience are driven more by technological advancement than by the ever-growing number of online connections.

dropped the old name, Alto Aloha Network, in favor of a new phrase: the “ETHER Network.” “If Ethernet was invented in any one memo, by any one person, or on any one day,” says Metcalfe, “this was it.

PARC had given them something magical: an Alto-Ethernet—laser printer—GUI system that was like nothing else on the planet.

As the 1970s drew to a close, and Commodore, Tandy, Altair, and Apple began to emerge from the sidelines, PARC director Bert Sutherland asked Larry Tesler to assess what some analysts were already predicting to be the coming era of “hobby and personal computers.” “I think that the era of the personal computer is here,” Tesler countered; “PARC has kept involved in the world of academic computing, but we have largely neglected the world of personal computing which we helped to found.”41 His warning went largely unheeded. Xerox Corporation’s parochial belief that computers need only talk to printers and filing cabinets and not to each other meant that the “office of the future” remained an unfulfilled promise, and in the years between 1978 and 1982 PARC experienced a dispersal of core talent that rivals the flight of Greek scholars during the declining years of Byzantium: Charles Simonyi brought the Alto’s Bravo text editing program to Redmond, Washington, where it was rebooted as Microsoft Word; Robert Metcalf used the Ethernet protocol he had invented at PARC to found the networking giant, 3Com; John Warnock and Charles Geschke, tiring of an unresponsive bureaucracy, took their InterPress page description language and founded Adobe Systems; Tesler himself brought the icon-based, object-oriented Smalltalk programming language with him when he joined the Lisa engineering team at Apple, and Tim Mott, his codeveloper of the Gypsy desktop interface, became one of the founders of Electronic Arts—five startups that would ultimately pay off the mortgages and student loans of many hundreds of industrial, graphic, and interaction designers, and provide the tools of the trade for untold thousands of others.

Κοιμήσου" Αν κάποτε στα σκαριά ενός ιστότοπου, στο μαύρο πληκτρολόγιο ενός pc, στη χρωματιστή ξενοιασιά της φυλακής σου, ξυπνήσεις χωρίς σύνδεση πιά, ρώτα τον πΟΤΕ, ρώτα το router, το Wi-Fi, την θύρα Ethernet, κάθε τι που ενώνει, κάθε τι που συνδέει, κάθε τι που εκπέμπει, που κοιμίζει, που μιλάει· ρώτα τί ώρα είναι; Κι ο πΟΤΕ, το router, το Wi-Fi, η θύρα Ethernet, θα σου απαντήσουν: Είναι ἡ ώρα του ύπνου! Για να γίνεις ὁ αδιαμαρτύρητος σκλάβος του χρόνου, συνδέσου, συνδέσου αδιάκοπα! Αλλά με τί; Με smartphone, με σταθερό, με notebook, με tablet... -Με ό,τι θέλεις, αλλά κοιμήσου!... Μια παραλλαγή του ποιήματος "Μεθύστε" του Γάλλου ποιητή Charles Baudelaire.

Знаменитый писатель Джонатан Франзен поведал публике, какие мосты сжег он, дабы не сбиться с пути. Как многие авторы — и офисные работники, — он легко отвлекался на компьютерные игры и Интернет. В беседе с репортером журнала Time он признался, что переоборудовал свой ноутбук, чтобы не искушаться битьем баклуш. Он стер с жесткого диска все программы, которые пожирали его время (включая заклятого врага всех писателей, «Солитера»). Он вынул из компьютера плату беспроводной связи и разрушил порт Ethernet. «Нужно сделать так, — объяснил он. — Смажьте кабель Ethernet суперклеем, а потом вставьте в гнездо и отпилите головку». Возможно, вы не готовы зайти так далеко: искорежить компьютер, лишь бы не отвлекаться, но уже придуманы технологии, чтобы удерживать будущее «я» на верном пути. Например, программа Freedom (macfreedom.com) в заданное время отключает интернет-доступ, a Anti-Social (anti- social.cc) запрещает заходить на сайты избранных социальных сетей и скрывает отдельные электронные письма. Лично я предпочитаю ProcrasDonate (procrasdonate.com): программа списывает деньги с вашего счета за каждый час, проведенный на бесполезных сайтах, и отправляет средства на благотворительность. А если ваш соблазн более осязаем — например, это шоколад или сигареты, — попробуйте CapturedDiscipline: это внушительный стальной сейф, который можно запереть на любой срок, от двух минут до 99 часов. Если хотите купить пачку печенья и не слопать за один присест, спрячьте ее. Если подумываете наложить запрет на использование кредиток, они тоже могут отправиться в сейф, и ваше будущее соблазняемое «я» достанет их только с динамитным зарядом. Если ваша цель — некая деятельность, вложите в нее деньги. Например, если желаете заставить себя заниматься спортом, купите дорогой годовой абонемент в тренажерный зал[30]. Шеллинг утверждает, что эта стратегия не отличается от политики страны, которая наращивает ядерный арсенал. Ваше будущее «я» будет знать, что вы настроены всерьез, и подумает дважды, прежде чем угрожать целям вашего разумного «я».

Ethernet Switching was developed in 1996 and quickly took hold as the preferred method of networking. A switch, like a hub, is a central connecting device that all computers connect to, and like a hub it regenerates the signal, but that’s where the similarity ends. A switch takes the signal (frames of data) and sends it to the correct computer instead of broadcasting it out to every port. It does this by identifying the MAC address of each computer.

A VLAN tags Ethernet frames with a 12-bit number, and this enables the physical networking gear to differentiate between the traffic that belongs with individual VLANs

The travel sites all describe Luxembourg as a fairy tale come to life, but it feels less like a Grimm land of trolls and big bad wolves, and more like Disneyland Paris. Luxembourg is the wealthiest country in all of Europe, and the Old City is overrun by the tax-sheltered children of eBay and Skype executives, moving in Pied Piper phalanxes with their phones out and thumbs flying—casting spells out into the ethernet." (from "The Unchangeable Spots of Leopards: A Novel (Ala Notable Books for Adults)" by Kristopher Jansma)

IBM launched its Chess machine, renamed simply the Personal Computer, in August 1981, a scant four months after the Star. Judged against the technology PARC had brought forth, it was a homely and feeble creature. Rather than bitmapped graphics and variable typefaces, its screen displayed only ASCII characters, glowing a hideous monochromatic green against a black background. Instead of a mouse, the PC had four arrow keys on the keyboard that laboriously moved the cursor, character by character and line by line. No icons, no desktop metaphor, no multitasking windows, no e-mail, no Ethernet. Forswearing the Star’s intuitive point-and-click operability, IBM forced its customers to master an abstruse lexicon of typed commands and cryptic responses developed by Microsoft, its software partner. Where the Star was a masterpiece of integrated reliability, the PC had a perverse tendency to crash at random (a character flaw it bequeathed to many subsequent generations of Microsoft Windows-driven machines). But where the Star sold for $16,595-plus, the IBM PC sold for less than $5,000, all-inclusive. Where the Star’s operating system was closed, accessible for enhancement only to those to whom Xerox granted a coded key, the PC’s circuitry and microcode were wide open to anyone willing to hack a program for it—just like the Alto’s. And it sold in the millions.

*It would be several years before overall activity on the ARPANET significantly surpassed what PARC generated within its own building. As late as 1979 the average daily traffic on the PARC Ethernet, which linked 120 Altos and Dorados, came to fully half what was carried nationwide on the entire ARPANET.

Xerox had the Alto; IBM launched the Personal Computer. Xerox had the graphical user interface with mouse, icons, and overlapping windows; Apple and Microsoft launched the Macintosh and Windows. Xerox invented What-You-See-Is-What-You-Get word processing; Microsoft brazenly turned it into Microsoft Word and conquered the office market. Xerox invented the Ethernet; today the battle for market share in the networking hardware industry is between Cisco Systems and 3Com. Even the laser printer is a tainted triumph. Thanks to the five years Xerox dithered in bringing it to market, IBM got there first, introducing its own model in 1975.

The Ethernet protocol operates at the network access layer.

Everything done at PARC, from the Alto to Bob Metcalf’s Ethernet architecture, was geared to making a decentralized network of personal computers function efficiently. This was new. The second core principle flowed from Alan Kay’s Dynabook. As Brown says, “The Dynabook and then the Alto were inspirations meant to empower the artistic individual.

Wi-Fi is one of the maximum vital technological developments of the present day age. It’s the wireless networking wellknown that enables us experience all of the conveniences of cutting-edge media and connectivity. But what is Wi-Fi, definitely? The time period Wi-Fi stands for wi-fi constancy. Similar to other wi-fi connections, like Bluetooth, Wi-Fi is a radio transmission generation. Wireless fidelity is built upon a fixed of requirements that permit high-pace and at ease communications among a huge sort of virtual gadgets, get admission to points, and hardware. It makes it viable for Wi-Fi succesful gadgets to get right of entry to the net without the want for real wires. Wi-Fi can function over brief and long distances, be locked down and secured, or be open and unfastened. It’s particularly flexible and is simple to use. That’s why it’s located in such a lot of famous devices. Wi-Fi is ubiquitous and exceedingly essential for the manner we function our contemporary linked world. How does Wi-Fi paintings? Bluetooth Mesh Philips Hue Wi-fi Although Wi-Fi is commonly used to get right of entry to the internet on portable gadgets like smartphones, tablets, or laptops, in actuality, Wi-Fi itself is used to hook up with a router or other get entry to point which in flip gives the net get entry to. Wi-Fi is a wireless connection to that tool, no longer the internet itself. It also affords get right of entry to to a neighborhood community of related gadgets, that's why you may print photos wirelessly or study a video feed from Wi-Fi linked cameras without a want to be bodily linked to them. Instead of the usage of stressed connections like Ethernet, Wi-Fi uses radio waves to transmit facts at precise frequencies, most typically at 2.4GHz and 5GHz, although there are numerous others used in more niche settings. Each frequency range has some of channels which wireless gadgets can function on, supporting to spread the burden in order that person devices don’t see their indicators crowded or interrupted by other visitors — although that does happen on busy networks.

Metcalfe’s law, is named after Robert Metcalfe, the co-inventor of the networking technology Ethernet.

Always bring your own logistical hardware such as a spare power cord, an extension strip, and a mini Ethernet hub.

smart media companies stand to benefit enormously from the shift from coax to ethernet. Why? Once the shift to digital is complete, these businesses will be able to explore entirely new ways of taking advantage of their core assets (infrastructure, pipe, and people) in order to bring new services to their customer base. Stuff we haven’t even thought of yet.

The original Ethernet consisted of a fat cable into which a wire coming from each computer was forcibly inserted using what was euphemistically referred to a vampire tap.

Xerox had an attractive financial model focused on leasing and servicing machines and selling toner, rather than big-ticket equipment sales. For Xerox and its salespeople, this meant steadier, more recurring income. With a large baseline of recurring revenues, budgets were more likely to be met, which allowed management to give accurate guidance to stock analysts. For customers, the cost of leasing a copier is accounted for as an operating expense, which doesn’t usually entail upper management approval as a capital purchase might. As a near-monopoly manufacturer of copiers, Xerox could reduce costs by building more of a few standard models. As owner of a fleet of potentially obsolete leased equipment, Xerox might prefer not to improve models too quickly. As Steve Jobs saw it, product people were driven out of Xerox, along with any sense of craftsmanship. Nonetheless, in 1969, Xerox launched one of the most remarkable research efforts ever, the Palo Alto Research Center (PARC), without which Apple, the PC, and the Internet would not exist. The modern PC was invented at PARC, as was Ethernet networking, the graphical user interface and the mouse to control it, email, user-friendly word processing, desktop publishing, video conferencing, and much more. The invention that most clearly fit into Xerox’s vision of the “office of the future” was the laser printer, which Hewlett-Packard exploited more successfully than Xerox. (I’m watching to see how the modern parallel, Alphabet’s moonshot ventures, works out.) Xerox notoriously failed to turn these world-changing inventions into market dominance, or any market share at all—allowing Apple, Microsoft, Hewlett-Packard, and others to build behemoth enterprises around them. At a meeting where Steve Jobs accused Bill Gates of ripping off Apple’s ideas, Gates replied, “Well Steve, I think there’s more than one way of looking at it. I think it’s like we both had this rich neighbor named Xerox and I broke in to steal his TV set and found out that you had already stolen it.