Re: ccna 3.1 -- Practice Tests for Cisco CCNA Exam 640-801

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Subject: Re: ccna 3.1

Author:
Chotu (ok)

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Date Posted: 11:05:40 01/30/07 Tue
In reply to: ankit a 's message, "ccna 3.1" on 01:50:21 02/24/05 Thu

>>>please send me ccna 3.1 chapters questions and
>answers
1 What conditions are described when transmission signals from one wire pair affects another wire pair? (Choose two.)

noise
resistance mismatch
jitter
crosstalk
attenuation

2 What factors need to be considered to limit the amount of signal attenuation in Ethernet cable runs? (Choose two.)

type of users
number of users
length of cable
type of electrical equipment
installation of connectors on the cable

3 Which of the following describes frequency?

length of each wave
height of each wave
number of cycles each second
amount of time between each wave

4 What is a cause of crosstalk in UTP cable?

cable pairs that are shorted
cable pairs crossed during termination
cabling runs installed in separate conduit
cable pairs that are untwisted because of poor termination of the cable

5 Which of the following are detected by the wire map test? (Choose three.)

near-end crosstalk (NEXT)
opens
propagation delay
return loss
reversed-pair faults
short circuits

6 A small company is experiencing difficulties on its LAN. After performing some tests, a technician has determined that the copper media supporting the LAN is experiencing abnormal attenuation. What are two possible causes of the problem? (Choose two.)

defective connectors
excessively long cable lengths
use of higher grade cabling
low frequency signals used in the media
network cable runs isolated from other cables

7 How are binary ones and zeros represented in fiber optic installations? (Choose two.)

+5 volts/-5 volts
0 volts/5 volts
light/no light
high to low electrical transition
low to high electrical transition
increasing/decreasing light intensity

8 What is expected when crosstalk is present in networks with higher transmission frequencies? (Choose two.)

jitter
increase in crosstalk
higher signal attenuation
increases in cancellation effect
destruction of more of the data signal

9 A company needs to extend the LAN to six separate buildings. To limit the amount of signal attenuation on the LAN media, what type of media would be the best to use between the buildings?

air (wireless)
coaxial cable
fiber
shielded twisted pair
unshielded twisted pair

10 To ensure reliable LAN communications, what should a technician be looking for when attaching connectors to the ends of UTP cable?

that the white-orange/orange pair is attached first
that the wire pairs remain twisted as much as possible
that one end of the shield is properly ground but not the other
that 50 ohm termination resistors are on both ends

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Replies:

[> [> [> [> Subject: Re: ccna 3.1

Author:
chotu (ok)
[ Edit | View ]

Date Posted: 11:06:48 01/30/07 Tue

>>>>please send me ccna 3.1 chapters questions and
>>answers
>1 What conditions are described when transmission
>signals from one wire pair affects another wire pair?
>(Choose two.)
>
> noise
> resistance mismatch
> jitter
> crosstalk
> attenuation
>
>
>
>
>2 What factors need to be considered to limit the
>amount of signal attenuation in Ethernet cable runs?
>(Choose two.)
>
> type of users
> number of users
> length of cable
> type of electrical equipment
> installation of connectors on the cable
>
>
>
>
>3 Which of the following describes frequency?
>
> length of each wave
> height of each wave
> number of cycles each second
> amount of time between each wave
>
>
>
>
>4 What is a cause of crosstalk in UTP cable?
>
> cable pairs that are shorted
> cable pairs crossed during termination
> cabling runs installed in separate conduit
> cable pairs that are untwisted because of poor
>termination of the cable
>
>
>
>
>
>
>
>
>
>
>5 Which of the following are detected by the wire map
>test? (Choose three.)
>
> near-end crosstalk (NEXT)
> opens
> propagation delay
> return loss
> reversed-pair faults
> short circuits
>
>
>
>
>6 A small company is experiencing difficulties on its
>LAN. After performing some tests, a technician has
>determined that the copper media supporting the LAN is
>experiencing abnormal attenuation. What are two
>possible causes of the problem? (Choose two.)
>
> defective connectors
> excessively long cable lengths
> use of higher grade cabling
> low frequency signals used in the media
> network cable runs isolated from other cables
>
>
>
>
>7 How are binary ones and zeros represented in fiber
>optic installations? (Choose two.)
>
> +5 volts/-5 volts
> 0 volts/5 volts
> light/no light
> high to low electrical transition
> low to high electrical transition
> increasing/decreasing light intensity
>
>
>
>
>8 What is expected when crosstalk is present in
>networks with higher transmission frequencies? (Choose
>two.)
>
> jitter
> increase in crosstalk
> higher signal attenuation
> increases in cancellation effect
> destruction of more of the data signal
>
>
>
>
>9 A company needs to extend the LAN to six separate
>buildings. To limit the amount of signal attenuation
>on the LAN media, what type of media would be the best
>to use between the buildings?
>
> air (wireless)
> coaxial cable
> fiber
> shielded twisted pair
> unshielded twisted pair
>
>
>
>
>10 To ensure reliable LAN communications, what should
>a technician be looking for when attaching connectors
>to the ends of UTP cable?
>
> that the white-orange/orange pair is attached first
> that the wire pairs remain twisted as much as
>possible
> that one end of the shield is properly ground but not
>the other
> that 50 ohm termination resistors are on both ends

[> [> [> [> Subject: Re: ccna 3.1
Author: uto (hi) [ Edit \| View ]	Date Posted: 03:11:06 03/06/07 Tue hi I would appreciate that if you can send papers for CCNA s1 to S4 (all paper). thanks