Ethernet Flashcards
What does 100BASE-T stand for?
100BASE-T refers to a standard Ethernet technology that supports 100 Mbps speed
It was originally called Fast Ethernet.
What are the two twisted-pair Ethernet standards that emerged to replace 10BASE-T?
100BASE-T4 and 100BASE-TX
100BASE-T4 used Cat 3 cable, while 100BASE-TX used Cat 5 and Cat 5e.
Which twisted-pair Ethernet standard became dominant by the late 1990s?
100BASE-TX
100BASE-T4 disappeared from the market and is now largely forgotten.
What is the maximum distance for a 100BASE-T connection?
100 meters between the hub/switch and the node
What is the node limit for 100BASE-T?
No more than 1024 nodes per hub/switch
What topology does 100BASE-T utilize?
Star-bus topology: physical star, logical bus
What type of cabling is required for 100BASE-T?
Cat 5 or better UTP or STP cabling with RJ-45/8P8C connectors
True or False: 100BASE-T networks are baseband networks.
True
What is the difference between baseband and broadband networks?
Baseband allows only a single signal to travel over the wires at one time, while broadband allows multiple signals to flow over the same wire at the same time
Broadband modulates to higher frequencies.
What steps are needed to upgrade a 10BASE-T network to 100BASE-T?
- Install Cat 5 cable or better
- Replace all 10BASE-T NICs with 100BASE-T NICs
- Replace 10BASE-T hub/switch with a 100BASE-T hub/switch
What technology was developed to ease the upgrade from 10BASE-T to 100BASE-T?
Multispeed, auto-sensing NICs and hubs/switches
What is the speed of 100BASE-FX?
100 Mbps
What is the maximum distance for 100BASE-FX between the hub/switch and the node?
Two kilometers
What is the node limit for 100BASE-FX per hub/switch?
No more than 1024 nodes
What type of topology does 100BASE-FX use?
Star-bus topology: physical star, logical bus
What type of cabling is used in 100BASE-FX?
Multimode fiber-optic cabling (generally OM1)
What connectors are commonly used with 100BASE-FX?
ST or SC
What kind of signal type does 100BASE-FX use?
Baseband
What type of multimode fiber is recommended for 1000BASE-SX?
OM2 or better multimode fiber
OM1 works for short distances.
What is the wavelength of 1000BASE-SX?
850 nm
What is the wavelength of 1000BASE-LX?
1300 nm
What type of cabling is used for 1000BASE-T?
Cat 5e/6 UTP
What type of single-mode fiber is used for 1000BASE-LX?
OS1 or OS2 single-mode fiber
What is the maximum length for 1000BASE-SX over multimode fiber?
220-500 m
