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قديم 04-12-2013, 06:59 PM   #1
farah
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تاريخ التسجيل: Apr 2013
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farah will become famous soon enough
افتراضي بعض الاسئلة يا ليت اهل الخبرة يفيدوني


Which frequency offers the highest bandwidth?
a- 5 GHz
b- 2.4 GHz
c- 900 MHz
d- 800 MHz

Multipath propagation may result in:
a- Down fade
b- Scattering
c- Nulling
d- Refraction
e- Diffraction
f- Data Corruption

Power over Ethernet may work in two different modes, A or B.
What makes them different?
a- A can supply more power than B
b- A uses data wires, B uses spare wires
c- A supplies a higher voltage than B
d- A only works with wireless devices

A switch receives a frame whose source address is already listed in the Port-Address table. What will the switch do?
الموضوع الأصلى من هنا: منتديات سيسكو التعليمية | كن بين الخبراء ! http://www.ciscovb.com/vb/t6814.html#post33737
a- Delete the table entry
b- Verify the port number
c- Drop the frame
d- Reset the timer of this entry
e- Send a broadcast
f- Send the frame back


Imagine you were the system administrator of a Local Area Network with about 40
PCs and a few printers. Your network uses a star topology with 4 hubs and UTP Cat 6
cabling, running Ethernet 100BaseTX. However, your measurements show that the
maximum data rate is less than 40 Mbps instead of the expected 100 Mbps.
1- What is most likely the cause of the problem?
2- What do you have to do to increase the data rate?



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التعديل الأخير تم بواسطة farah ; 04-12-2013 الساعة 07:43 PM
farah غير متواجد حالياً   رد مع اقتباس
 

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