Computer Network Test Set 4

Computer Network Test Set 4

Q16➡ |
In RSA
P and Q are chosen as very large prime number
Compute n = pq and Φ(n) = (n-1)(q-1)
Letter e encryption key chosen. How is this encryption key selected?
i ➥ e is chosen as a relative prime to q
ii ➥ e is chosen as a relative prime to p
iii ➥ e is chosen as a relative prime to Φ(n)
iv ➥ e is chosen as a relative prime to n

Q17➡ |
Determine the maximum length of the cable (in Km) for transmitting data at a rate of 700 Mbps in an Ethernet LAN with frames of size 10,000 bits. Assume the signal speed in the cable to be 2,00,000 km/sec.
i ➥ 2.152
ii ➥ 2
iii ➥ 1.428
iv ➥ 1.75

Q18➡ |
Assume that source S and destination D are connected through five intermediate routers R1, R2,R3,R4 and R5. Determine how many times each packet has to visit the Network layer and the Data Link layer during transmission from S to D?
i ➥ Network Layer: 7 times, Data Link Layer: 12 times
ii ➥ Network Layer: 5 times, Data Link Layer: 12 times
iii ➥ Network Layer: 12 times, Data Link Layer: 12 times
iv ➥ Network Layer: 7 times, Data Link Layer: 7 times

Q19➡ |
Considering the following key using a block of five characters, encryption of the message “NETWORKING” using the Transposition Cipher is:
Plaintext : 5 4 3 2 1
Ciphertext 1 2 3 4 5
i ➥ NREKTIWNOG
ii ➥ OGWNTIEKNR
iii ➥ OWTENGNIKR
iv ➥ GNIKROWTEN

Q20➡ |
Match the following.
List I List II
I)Attenuation P) Loss of energy
II)Shannon capacity Q) Changes in shape of the signal
Ill)Nyquist bit rate R) Noisy channel
IV)Distortion S) Noiseless channel
i ➥ I-P, II-Q,III-R,IV-S
ii ➥ I-P, II-R,III-S,IV-Q
iii ➥ I-S, II-R,III-Q,IV-P
iv ➥ I-Q, II-P,III-S,IV-R

Weekly Test GATE/NTA NET CSA

6 thoughts on “Computer Network Test Set 4”

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    Ans 16 – e is chosen as a relative prime to Φ(n)
    Ans 17 – 1.428
    Ans 18 – Network Layer: 7 times, Data Link Layer: 12 times
    Ans 19 – OWTENGNIKR
    Ans 20 – I-P, II-R,III-S,IV-Q

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