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: 11:06:48 01/30/07 Tue
In reply to: Chotu 's message, "Re: ccna 3.1" on 11:05:40 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

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[> [> [> [> 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