Steve Smith explains why there is a 10-fold increase in speed from 10Mbit/s, to 100Mbit/s, then 1000BMit/s Ethernet.
Episode #6-10 released on November 8, 2015
Back in the 80s and 90s, homes around the world would have to access servers by dialing directly to them via telephone, later on, we connect to ISPs directly that allowed us to connect to many more servers. When cable and DSL became available, we migrated to so-called faster speeds, and when networking in homes became a thing we started off with 10Mbit/s networking. But how did we come from 10Mbit/s, to 1000mbit/s LANs?
The issue is not exactly how we went from 10Mbit/s to 1000Mbit/s, but first, how we successfully went from 10Mbit/s to 100MBIt/s networking.
Back in the days of 10Mbit/s, signals over Ethernet were transmitted over 2 pairs of twisted cables using voltages of +2.5V or -2.5V. 10Mbit/s Ethernet LANs required category 3 cable minimum.
100Mbit/s LANs are different, for starters they require a minimum category 5 Ethernet cable. They functioned with 2 twisted pairs, but the voltage was modulated from +1V, 0V, and -1V. Three states does allow for connectivity to be faster, but limits the cable to 100M.
1000Mbit/s LANs are the norm in most homes today, requiring Category 5E or better Ethernet cables, and having signal voltage modulations of +1V, +0.5V, 0V, -0.5V, and -1V. It, also, uses 4 twisted pairs, and not just two, which it uses to communicate in both directions at the same time.
This is how we get the 10-fold speed increase from 10, 100 and finally to 1000Mbit/s LANs.
Back in the 80s and 90s, homes around the world would have to access servers by dialing directly to them via telephone, later on, we connect to ISPs directly that allowed us to connect to many more servers. When cable and DSL became available, we migrated to so-called faster speeds, and when networking in homes became a thing we started off with 10Mbit/s networking. But how did we come from 10Mbit/s, to 1000mbit/s LANs?
The issue is not exactly how we went from 10Mbit/s to 1000Mbit/s, but first, how we successfully went from 10Mbit/s to 100MBIt/s networking.
Back in the days of 10Mbit/s, signals over Ethernet were transmitted over 2 pairs of twisted cables using voltages of +2.5V or -2.5V. 10Mbit/s Ethernet LANs required category 3 cable minimum.
100Mbit/s LANs are different, for starters they require a minimum category 5 Ethernet cable. They functioned with 2 twisted pairs, but the voltage was modulated from +1V, 0V, and -1V. Three states does allow for connectivity to be faster, but limits the cable to 100M.
1000Mbit/s LANs are the norm in most homes today, requiring Category 5E or better Ethernet cables, and having signal voltage modulations of +1V, +0.5V, 0V, -0.5V, and -1V. It, also, uses 4 twisted pairs, and not just two, which it uses to communicate in both directions at the same time.
This is how we get the 10-fold speed increase from 10, 100 and finally to 1000Mbit/s LANs.
Host : Steve Smith | Music : Jonny Lee Hart | Editor : Steve Smith | Producer : Zed Axis Productions