Woody Leonhard - Windows 10 All-in-One For Dummies

There are two basic ways to hook up to the Internet: wired and wireless. Wired is easy: You plug your computer into a router or some other box that connects to the Internet. Wireless falls into two categories: Wi-Fi connections, which you find in many homes, coffee shops, airports, and all kinds of public places, and cellular (mobile phone–style) wireless connections.

Cellular Wireless Internet connections are identified with one of the G levels: 2G, 3G, 4G, or maybe even 5G. Each G level is faster than its predecessor.

This part gets a little tricky. If your smartphone can connect to a 3G or 4G network, it may be possible to set it up to behave like a Wi-Fi router: Your laptop talks to the smartphone, and the smartphone talks to the Internet over its 3G or 4G (or 5G) connection. That process is called tethering — your laptop is tethered to your smartphone. Not all smartphones can tether, and not all manufacturers allow it.

Special boxes called mobile hotspot units work much the same way: The mobile hotspot connects to the 3G or 4G (or 5G) connection, and your laptop gets tethered to the mobile hotspot box. Most smartphones these days can be configured as mobile hotspots.

If you plug your Internet connection into the wall, you have broadband, which may run via fiber (a cable that uses light waves), DSL or ADSL (which uses regular old phone lines), cable (as in cable TV), or satellite. The fiber, DSL, cable, or satellite box is called a modem, although it’s really a router. Although fiber-optic lines are inherently much faster than DSL or cable, individual results can be all over the lot. Ask your neighbors what they’re using and then pick the best. If you don’t like your current service, vote with your wallet.

Turning to the dark side of the force, Luke, the distinctions among viruses, worms, and Trojans grow blurrier every day. In general, they’re programs that replicate and can be harmful, and the worst ones blend different approaches. Spyware gathers information about you and then phones home with all the juicy details. Adware gets in your face with dodgy ads, all too frequently installing itself on your computer without your knowledge or consent. Ransomware scrambles (or threatens to scramble) your data and demands a payment to keep the data intact. I tend to lump the three together and call them scumware or crapware or something a bit more descriptive and less printable.

If a bad guy (and they’re almost always guys) manages to take over your computer without your knowledge, turning it into a zombie that spews spam by remote control, you’re in a botnet. (And yes, the term spam comes from the immortal Monty Python routine that’s set in a cafe serving Hormel’s SPAM luncheon meat, the chorus bellowing “lovely Spam, wonderful Spam.”) Check out Book 9for details about preventing scumware and the like from messing with you.

The most successful botnets employ rootkits — programs that run underneath Windows, evading detection because regular programs can’t see them. The number of Windows 10 computers running rootkits is probably two or three or four orders of magnitudes less than the number of zombified Windows XP computers. However, as long as Windows XP computers are out there, botnets will continue to be a major threat to everyone.

This section covers about 90 percent of the buzzwords you hear in common parlance. If you get stuck at a party where the bafflegab is flowing freely, don’t hesitate to invent your own words. Nobody will ever know the difference.

Years from now, the operating system you use will be largely irrelevant, as will be the speed of your computer, the amount of memory you have, and the number of terabytes of storage that hum in the background. Microsoft will keep milking its cash cow, but the industry will move on. Individuals and businesses will stop shelling out big bucks for Windows and the iron to run it. Instead, the major push will be online. Rather than spend money on PCs that become obsolete the week after you purchase them, folks will spend money on big data pipes: It’ll be less about me and more about us. Why? Because so much more is “out there” than “in here.” Count on it.

But what is the Internet? This section answers this burning question (if you’ve asked it). If you don’t necessarily wonder about the Internet’s place in space and time just yet, you will … you will.

You know those stories about computer jocks who come up with great ideas, develop the ideas in their basements (or garages or dorm rooms), release their products to the public, change the world, and make a gazillion bucks?

This isn’t one of them.

The Internet started in the mid-1960s as an academic exercise — primarily with the RAND Corporation, the Massachusetts Institute of Technology (MIT), and the National Physical Laboratory in England — and rapidly evolved into a military project, under the US Department of Defense Advanced Research Project Agency (ARPA), designed to connect research groups working on ARPA projects.

By the end of the 1960s, ARPA had four computers hooked together — at UCLA, SRI (Stanford), UC Santa Barbara, and the University of Utah — using systems developed by BBN Technologies (then named Bolt Beranek and Newman, Inc.). By 1971, it had eighteen. I started using ARPANET in 1975. According to the website www.internetworldstats.com , at the beginning of 2020, the Internet had more than 4.5 billion users worldwide — well over half of the global population.

Today, so many computers are connected directly to the Internet that the Internet’s addressing system is running out of numbers, just as your local phone company is running out of telephone numbers. The current numbering system — named IPv4 — can handle about 4 billion addresses. The next version, named IPv6, can handle this number of addresses:

340,000,000,000,000,000,000,000,000,000,000,000,000

That should last for a while, don’t you think?

Ever wonder why you rarely see hard statistics about the Internet? I’ve found two big reasons:

Defining terms related to the Internet is devilishly difficult these days. (What do you mean when you say, “ X number of computers are connected to the Internet”? Is that the number of computers up and running at any given moment? The number of different addresses that are active? The number that could be connected if everybody dialed up at the same time? The number of different computers that are connected in a typical day, or week, or month?)

The other reason is that the Internet is growing so fast that any number you publish today will be meaningless tomorrow.

Some observers claim that the Internet works so well because it was designed to survive a nuclear attack. Not so. The people who built the Internet insist that they weren’t nearly as concerned about nukes as they were about making communication among researchers reliable, even when a backhoe severed an underground phone line or one of the key computers ground to a halt.