Chapter 4: Modern Ethernet

Question 1

With 100BaseT, what is the maximum distance
between the hub (or switch) and the node?
A. 1000 meters
B. 400 meters
C. 100 meters
D. 150 meters

Answer 1

C. The maximum distance is 100 meters.

Question 2

What type of cable and connector does 100BaseFX
use?
A. Multimode fiber with ST or SC connectors
B. STP Cat 6 with RJ-45 connectors
C. Single-mode fiber with MT-RJ connectors
D. UTP Cat 5e with RJ-45 connectors

Answer 2

A. 100BaseFX uses multimode fiber with either ST

or SC connectors.

Question 3

How many pairs of wires do 10BaseT and 100BaseT
use?
A. 4
B. 1
C. 3
D. 2

Answer 3

D. 10BaseT and 100BaseT use two wire pairs.

Question 4

What standard does IEEE 802.3ab describe?
A. 1000BaseLX
B. 1000BaseT
C. 100BaseT
D. 1000BaseSX

Answer 4

B. IEEE 802.3ab is the 1000BaseT standard (also

known as Gigabit Ethernet).

Question 5

What is the big physical difference between
1000BaseSX and 100BaseFX?
A. 1000BaseSX uses the SC connector exclusively.
B. 1000BaseSX is single-mode, whereas 100BaseFX
is multimode.
C. 1000BaseSX uses the ST connector exclusively.
D. There is no difference.

Answer 5

A. While 1000BaseSX looks similar to 100BaseFX,

the former does not allow the use of the ST connector.

Question 6

What is the maximum distance for 1000BaseLX
without repeaters?
A. 1 mile
B. 2500 meters
C. 20,000 feet
D. 5000 meters

Answer 6

D. 1000BaseLX can go for 5000 meters (5

kilometers).

Question 7

What is a big advantage to using fiber-optic cable?
A. Fiber is common glass; therefore, it’s less
expensive.
B. Fiber is not affected by EMI.
C. Making custom cable lengths is easier with fiber.
D. All that orange fiber looks impressive in the
network closet.

Answer 7

B. Because fiber uses glass and light, it is not

affected by EMI.

Question 8

How many wire pairs does 1000BaseT use?
A. 1
B. 2
C. 3
D. 4

Answer 8

D. 1000BaseT uses all four pairs of wires.

Question 9

What is the standard connector for the 10 GbE fiber
standard?
A. ST
B. SC
C. MT-RJ
D. There is no standard.

Answer 9

D. There is no standard connector; the 10 GbE

committee has left this up to the manufacturers.

Question 10

What is the maximum cable length of 10GBaseT
on Cat 6?
A. 55 meters
B. 100 meters
C. 20 meters
D. 70 meters

Answer 10

A. With Cat 6 cable, 10GBaseT is limited to 55

meters.