Database Reference
In-Depth Information
1,000,000
Disk capacity
Disk throughput
Network bandwidth
CPU speed
100,000
10,000
1,000
100
10
1
1990
2000
2010
Year
Figure 1.6
Hardware trends in the 1990s and the last decade.
table 1.2
Comparison of Communications technologies
Communications Technology
Bandwidth
Time for Sending
1 MB File
Modem using analog signal
over phone line
28.8 kB/s
5 min
ISDN using digital signal
over phone line
128 kB/s
1 min
T1 using digital signal over
private phone line
1.5 MB/s
16 s
Cable using Modem digital
signal over Ethernet
10 MB/s
0.80 s
T3 using digital signal over
private phone line
45 MB/s
0.53 s
ATM using digital signal over
ATM-switched network
155 MB/s
0.05 s
ATM using digital signal over
ATM-switched network
1 GB/s
0.008 s
Table 1.2 gives a comparison of communications technologies in terms of the approx. time
required to send file with a size of 1 MB.
The merging of previously disparate technologies, products, and information to give rise to
compelling new products and services also underscores the concept of the merging of the con-
tainer and content that we referred to earlier. Convergence increasingly means that products in the
