Answer to Question #212905 in Computer Networks for Henri MAHE

Question

Answer the following questions in your own words:

1. What do you understand by The Hidden Node Problem? Describe 2 different spatial configurations which exemplify this issue.
2. What is the 4B/5B encoding for the 3-byte (ASCII) string “Sun”?
3. What is the 16-bit internet checksum for the 3-byte binary message 00110001 00110010 00110011?
4. Suppose a message is 11011000. What is the CRC checksum using the polynomial corresponding to 1011 to give a 3-bit answer? (Show the solution steps, not just the answer).
5. What is Time Domain Reflectometry?

Answer 1

1. It occurs when a nose can communicate with a wireless access point but it cannot directly 5communicate with other nodes that are communicating with that access point.

Solution is through making sure that all the nodes are within a reach of other nodes or increasing the range of nodes which will ensure that all are within the reach.

2. S in ASCII is 01010011u and in ASCII is 0111 0101n in ASCII is 0110 1110 we can use the above as input 4b to get output 5b

4b 5b

0101 01011

0011 10101

0111 01111

0101 01011

0110 01110

1110 11100

Therefore 4b\5b encoding is

0101110101 0111101011 0111011100

3.16-bit is

10011011 11001101

4.modulo-2 division of 11011000 by 1011

1011/11011000000

1011

1101

1011

1100

1011

1110

1011

1010

1011

001000

1011

011

Answer is 011

5. It's a remote sensing electrical measurement to and it has been widely used to detect cable faults and discontinuities of signal lines.

Time domain Reflectometry

It's a remote sensing electrical measurement tool and it has been widely used to detect cable faults and discontinuities of signal lines