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5-8
• Streaming HD video requires 10 to 30 Mbps per stream. Because
latency and packet loss can disrupt your video, plan to provide at least
twice the capacity you need.
• Streaming MP3 audio requires less than 1 Mbps per stream and does
not strain most modern networks. Like video, however, streaming
audio is also sensitive to latency and packet loss, so a congested
network or a noisy link can cause problems.
• Backing up computers over the network has become popular due to
the availability of inexpensive mass storage. The following table
shows the time to transfer 1 gigabyte (GB) of data using various
networking technologies.
Table 5-1. Theoretical Transfer Time for 1 Gigabyte
Network Connection Theoretical Raw Transfer Time
Gigabit wired Ethernet 8 seconds
NETGEAR
RangeMax NEXT Wireless-N 26 seconds
NETGEAR
Powerline HD 40 seconds
100 Mbps wired Ethernet 80 seconds
802.11g wireless 150 seconds
802.11b wireless 700 seconds
10 Mbps wired Ethernet 800 seconds
Cable modem (3 Mbps) 2700 seconds
Analog modem (56 kbps) 144,000 seconds (40 hours)
Note: Actual data throughput varies. Network conditions and
environmental factors, including volume of network
traffic, building materials and construction, and network
overhead, can lower actual data throughput rate.