Tho se packets wrap data chunks in an envelo pe surro

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ed last-mile techno lo gies are o f ten ref erred to as bro adband Internet access (o r just broadband). What qualif ies as bro adband varies. In 2009, the Federal Co mmunicatio ns Co mmissio n (FCC) redef ined bro adband as having a minimum speed o f 768 Kbps (ro ughly f o urteen times the speed o f tho se o ld 56 Kbps mo dems). Other agencies wo rldwide may have dif f erent def initio ns. But o ne thing is clear: a new generatio n o f bandwidth-demanding services requires mo re capacity. As we increasingly co nsume Internet services like HD streaming, real-time gaming, video co nf erencing, and music do wnlo ads, we are in f act beco ming a bunch o f vo racio us, bit-craving glutto ns. With the pivo tal ro le the United States has played in the creatio n o f the Internet, and in pio neering so f tware, hardware, and teleco mmunicatio ns industries, yo u might expect the United States to lead the wo rld in last-mile bro adband access. No t even clo se. A recent study ranked the United States twenty-sixth in do wnlo ad speeds,S. Lawso n, “US Ranks 26th in New Bro adband Index,” Co mputerw o rld, May 25, 2010. while o thers have ranked the United States f ar behind in speed, availability, and price.S. Hansell, “The Bro adband Gap: Why Is Theirs Faster?” New Yo rk Times, March 10, 2009. So unds grim, but help is o n the way. A range o f techno lo gies and f irms are upgrading inf rastructure and develo ping new systems that will increase capacity no t just in the United States but also wo rldwide. Here’s an o verview o f so me o f the majo r techno lo gies that can be used to speed the Internet’s last mile. Understanding Bandwidth When f o lks talk abo ut bandwidt h , they’re ref erring to data transmissio n speeds. Bandwidth is o f ten expressed in bits per seco nd, o r bps. P ref ix letters asso ciated with multiples o f bps are the same as the pref ixes we mentio ned in Chapter 5 "Mo o re’s Law: Fast, Cheap Co mputing and What It Means f o r the Manager" when discussing sto rage capacity in bytes: Kbps = tho usand bits (o r kilo bits...
View Full Document

This document was uploaded on 01/31/2014.

Ask a homework question - tutors are online