User:Itpastorn/dko/ccna1-3.1-7
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< User:Itpastorn | dko
Ethernet Technologies
Contents |
Overview CCNA 1 - Module 7 (3.1)
- 10BASE5, 10BASE2, and 10BASE-T Ethernet
- Manchester encoding
- Ethernet timing limits
- 10BASE-T wiring parameters
- 100-Mbps Ethernet
- The evolution of Ethernet
- Explain the MAC methods, frame formats, and transmission process of Gigabit Ethernet
- Specific media and encoding with Gigabit Ethernet
- Pinouts and wiring typical to the various implementations of Gigabit Ethernet
- Describe the similarities and differences between Gigabit and 10 Gigabit Ethernet
- Describe the basic architectural considerations of Gigabit and 10 Gigabit Ethernet
[edit] 10-Mbps and 100-Mbps Ethernet
Ethernet physical layer (all speeds)
[edit] 10 Mpbs Ethernet
| Parameter | Value |
|---|---|
| Bit time | 100 nanoseconds |
| Slot time | 512 bit times (64 octets) |
| Interframe gap | 96 bits (official value) |
| Collision attempt limit | 32 bits |
| Collision backoff limit | 10 |
| Collision jam size | 32 bits |
| Maximum untagged frame size | 1518 octets |
| Minimum frame size | 512 bits (64 octets) |
[edit] 10BASE5
[edit] 10BASE2
[edit] 10BASE-T
[edit] 10BASE-T wiring and architecture
[edit] 100-Mbps Ethernet
| Parameter | Value |
|---|---|
| Bit time | 10 nanoseconds |
| Slot time | 512 bit times (64 octets) |
| Interframe gap | 96 bits (official value) |
| Collision attempt limit | 32 bits |
| Collision backoff limit | 10 |
| Collision jam size | 32 bits |
| Maximum untagged frame size | 1518 octets |
| Minimum frame size | 512 bits (64 octets) |
[edit] 100BASE-TX
[edit] 100BASE-FX
[edit] Fast Ethernet architecture
[edit] Gigabit and 10-Gigabit Ethernet
[edit] 1000-Mbps Ethernet
| Parameter | Value |
|---|---|
| Bit time | 1 nanosecond |
| Slot time | 4096 bit times |
| Interframe gap | 96 bits (official value) |
| Collision attempt limit | 32 bits |
| Collision backoff limit | 10 |
| Collision jam size | 32 bits |
| Maximum untagged frame size | 1518 octets |
| Minimum frame size | 512 bits (64 octets) |
| Burst limit | 65 536 bits |
[edit] 1000BASE-T
[edit] 1000BASE-SX and LX
[edit] Gigabit Ethernet architecture
[edit] 10-Gigabit Ethernet
| Parameter | Value |
|---|---|
| Bit time | 0.1 nanosecond |
| Slot time | N/A for Optical fiber |
| Interframe gap | 96 bits (official value) |
| Collision attempt limit | 32 bits |
| Collision backoff limit | N/A full duplex only |
| Collision jam size | 32 bits |
| Maximum untagged frame size | 1518 octets |
| Minimum frame size | 512 bits (64 octets) |
| Burst limit | N/A full duplex only |
| Interframe spacing stretch ratio | 104 bits (10GBASE-W) |
- IEEE 802.3 sublayers are mostly preserved (a few additions for 40 km fiber links and interoperability with SONET/SDH technologies)
- TCP/IP can run over LANs, MANs, and WANs with one Layer 2 transport method
802.3ae-family:
- 10GBASE-SR
- short distances
- already-installed multimode fiber
- 26 meters to 82 meters
- 10GBASE-LX4
- Wavelength division multiplexing (WDM)
- 240 m to 300 m over already-installed multimode fiber
- 10 km over single-mode fiber
- 10GBASE-LR and 10GBASE-ER
- Support 10 km and 40 km over single-mode fiber
- 10GBASE-W (10GBASE-SW, 10GBASE-LW, and 10GBASE-EW)
- Intended for use with OC-192 SONET/SDH
[edit] 10-Gigabit Ethernet architectures
Half duplex is explicitly forbidden!
[edit] Future of Ethernet
It has won on the LAN over all other technologies. It will get faster - and faster - and faster...
Quality of service was deemed impossible, but it is has proved itself not to be. ATM is becoming redundant and both IP Telephony and Video multicast is perfectly possible over Ethernet today.
