Expanded IEEE Ethernet 802.3 standards

Question 1

100BaseTX (IEEE 802.3u)

Answer 1

Fast Ethernet
EIA/TIA cat5/5e/6 + UTP two-pair wiring
One user per segment up to 100 meters long (328 ft)
RJ-45 connector with physical star topology and logical bus

Question 2

100BaseT vs 100BaseTX

Answer 2

100BaseT = group of standards for fast Ethernet that includes 100BaseTX, T4, T2

Question 3

100BaseFX (IEEEE 802.3u)

Answer 3

62.5/126-micron multimode fiber cabling
up 412 meters
point-to-point topology
ST + SC connectors (media-interface connectors)

Question 4

1000BaseT (IEEE 802.3ab)

Answer 4

Category 5, four-pair UTP wiring, and up to 100 meters long (328 feet)

Question 5

1000BaseTX

Answer 5

Category 5, two-pair UTP wiring up to 100 meters long (328 feet). NOT used, and has been replaced by Category 6 cabling

Question 6

1000BaseSX (IEEE 802.3z)

Answer 6

• Gigabit Ethernet runs
• multimode fiber-optic cable
• short wavelength laser
  62.5- and 50-micron core
• 850 nanometer (nm) laser
• 220 meters with 62.5-micron; 550 meters with 50-micron

Question 7

1000BaseLX (IEEE 802.3z)

Answer 7

• Single-mode fiber
• 9-micron core
• 1,300 nm laser
• 3 km up to 10 km

Question 8

10GBaseT (802.3an)

Answer 8

• 10 Gbps connections over conventional UTP cables (Category Se, 6, 6A, or 7 cables)
• RJ-45 used for Ethernet LANs
• can support signal transmission at the full 100-meter distance specified for LAN wiring.
• If you need to implement a 10 Gbps link, this is the most economical way to go!

Question 9

10GBaseSR

Answer 9

• 10 Gigabit Ethernet
• short-wavelength lasers at 850 nm
• multimode fiber
• maximum transmission distance of between 2 - 300 meters (990 feet)

Question 10

10GBaseLR

Answer 10

• 10 Gigabit Ethernet
• uses long-wavelength lasers at 1,310 nm
• single-mode fiber
• Maximum transmission distance 2 meters -10 km, or 6 miles

Question 11

10GBaseER

Answer 11

• 10 Gigabit Ethernet
• single-mode fiber
• extra-long-wavelength lasers at 1,550 nm
• longest transmission distances possible of all the 10 Gigabit technologies: anywhere from 2 meters - 40 km

Question 12

10GBaseSW (IEEE 802.3ae)

Answer 12

• mode of 10GBaseS for MMF
• an 850 nm laser transceiver
• bandwidth of 10 Gbps
• can support up to 300 meters of cable length
• SONET

Question 13

10GBaseLW

Answer 13

mode of 10GBaseL supporting a link length of 10 km
- single-mode fiber (SMF) (G652)
- SONET

Question 14

10GBaseEW

Answer 14

mode of 10GBaseE supporting a link length of up to 40 km
- SMF based on G.652
- optical-wavelength 1,550 nm.
- SONET

Question 15

40GBaseT (802.3bq)

Answer 15

• supports Ethernet speeds up to 40G and is also used for 25G Ethernet connections commonly found in server NICs
• less distance than the slower Ethernet types with 40GBaseT limited to 30 meters.
• usually sufficient for data center cabling.
• Category 8 cabling is required to support the high data rates of 25GBaseT and 40GBaseT.