وهذي الي جاتني .. جبت 1.50 /2.25
Attenuation of a signal
-d the signal lost energy
In a fully-connected mesh network of 4 computers , the total number of links is
- b 8
which one of the following task is not done by data link layer?
-b channel coding
The period of a signal is 100 ms. what is its frequency in kilohertsz?
- a 0 001 KHz
if Digital signal has 2 bits , then max number of levels it can have is
- c 2
the MAC address type 78:87:84:49:32:23 is
- B Multicast
Bit Duration can be Calculated by dividing propagation speed by B4 length
- False
Which field of the Ethernet frame provides error detection:
- d CRC
High SNR means that we have a strong noise compared to the original singnal
-False
What is the relationship between the frequency(1) and preiod (T) of a signal?
- f=1/T
Which sublayer of the link-layer is always needed?
- MAC
A signal travels from point 1 to point 4. The signal is attenuated by" -1 dB" The
time it reaches point 2. Between points 2 and 3, the signal is amplified with "2
dB" . Again , between points 3 and 4 , the signal is attenuated by "-1 dB", In the
end, what would be the total power of this signal (in dB) from point 1 to 4 ?
- C 2
Physical layer provides
-All of the mentioned
The physical layer concerns with:
- a bit-by-bit delivery
An ARP response is mostly
- A Unicast
مطلوب حل الكويز it-210
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