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Question needs answer
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| joh322 2002-05-11, 6:30 pm |
| What are the two differences between 10BaseT and 100BaseT?(Choose two )
A. frame formats
B. addressing schemes
C. transmission speed
D. media access method
E. maximum network diameter
C is the first answer. Not sure about the
2nd answer, I think it is either A or B.
Both media access methods are UTP, therefore
D is incorrect.
Both network diameter is 100 meters, therefore E is incorrect.
Please help. | |
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| joh322 2002-05-12, 7:18 am |
| Sorry to ask a stupid question again.
Is ENCODING related to frame format or
addressing scheme?
I have searched both Cisco Press DCN and
CCDA Cert. Guide but I could not find the
answer.
Any guru here please help! | |
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| There is a difference in the network diameter: 100baseT has 205m and 10baseT 500m | |
| Bolero 2002-05-13, 4:29 am |
| Base your calculations on 512 bit-times for Ethernet. 10/100 have different bit times and thus, different network diameters.
Encoding/modulation is done at layer 1, framing at layer 2. | |
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| 100BaseT networks use the same time slot that 10BaseT networks do. Time slots require a stantion to transmit all its bits before another stantion can trnsmit its packet. For 100BaseT networks to transmit in the same time slots, the distance must be reduced. The timing in Fast Ethernet is shorter (10% of Ethernet). Max frame size or "time slot" is 1518 bytes. The physical distance is reduced because both Fast Ethernet and regular Ethernet specifications state that round trip time must not exceed 512 bit times. Since Fast Ethernet transmites faster, a signal of 512 bits covers a shorter distance.
The answer is E
Tod Lammle CCDA Study Guide ISBN:0-7821-2534-4 p.65 | |
| joh322 2002-05-14, 3:50 am |
| Really appreciated your help, guys! |
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