2. Fast Ethernet: Goals
Upgrade the data rate up to 100 Mbps
Make it compatible with Standard
Ethernet
Keep the same 48-bit address
Keep the same frame format
Keep the same minimum and maximum
frame lengths
Network Security
3. New features
Auto-negotiation:
It allows a station or a hub a range of capabilities.
Allows two devices to negotiate the mode or data
rate of operation
Allows incompatible devices to connect to one
another
Network Security
4. Topology used
Fast Ethernet is designed to connect two
or more stations together either in a
point-to-point or star topology (with a hub
or switch in center)
Network Security
5. Implementations
It can be categorized as either two-wire
or four-wire
Two-wire: cat 5 UTP (100Base-TX) or
fiber-optic cable (100Base-FX)
Four-wire: cat 3 UTP (100Base-T4)
Network Security
6. Gigabit Ethernet: Goals
Upgrades the data rate to 1 Gbps
Make it compatible with Standard or Fast
Ethernet
Use the same 48-bit address
Keep the same frame format
Keep the same minimum and maximum
frame lengths
To support auto-negotiation
Network Security
7. Modes
Implements half-duplex and full-duplex
Full-duplex:
A central switch connected to all computers
Each switch has buffers for each input port
No collision i.e. CSMA/CD is not used
Maximum length of cable is determined by signal
attenuation and not by collision detection process
Network Security
8. Modes (continued)
Half-duplex:
Rarely used, uses a hub instead of switch
Uses CSMA/CD
Frame Bursting Method is defined to
determine maximum length of network
Multiple frames are sent.
Padding is added in between these frames to look
like one frame, so that the channel is not idle.
Network Security
11. Things to do
Encoding schemes of Fast & Gigabit Ethernet
Switched Vs Fast Vs Gigabit Ethernet
What is Ten-Gigabit Ethernet?
Wireless Ethernet & its frame format
Learn Broadband & Bluetooth architectures
Network Security
