Paper I Data Communications Networking and Security

3D 396 6A1 996 D9 CD 52F 4C 3FB 614 4450 39 A 99 D CD 52 4C 3F 61 4 4 39 6A1 199 6D9 9CD 52F F4C 3FB B61 445 504DD8D 6 4...

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3D 396 6A1 996 D9 CD 52F 4C 3FB 614 4450 39 A 99 D CD 52 4C 3F 61 4 4 39 6A1 199 6D9 9CD 52F F4C 3FB B61 445 504DD8D 6 4 6 96 A19 996 D9C CD5 52F4 4C3 3FB 614 450 04D8 8D3 3D3 A1 96 D9 D 2F C FB 61 45 4D D D 96 6A 99 D C 52 4C 3F 6 44 04 8D 3D 39 A1 D 1 5 6 A1 1996 6D9 9CD 52F F4C 3FB B61 445 04DD8D 3D 396 A19 996 D 4 3 0 A 3 3 5 C 9 4 19 96DD9C D5 2F4 C3F FB6 6144 4504 4D8 8D3DD39 96A 199 96D 9CD 96 9C D5 2F C3 B 14 50 D D3 3 6A 19 6D 9C 52 96 D9C D5 2F 4C3 FB 614 450 4D 8D3 D3 96A 19 96D 9C D52 F4 4 8 9 C 6 D D 6D 9C D52 2F4 C3F FB6 144 4504 4D8 D3DD39 96A 199 6D9 9CD 52F F4C 3FB 9C D5 F4 C3 B6 144 504 D8 D3 39 6A 199 6D CD 52 4C 3F 61 9C D5 2F4 C3 FB6 144 504 D8 D3 D39 6A 199 6D 9CD 52 F4C 3F B61 445 F D 9 2 B F CDD52 F4C C3F B61 1445 504DD8DD3D 396 6A1 1996 6D9 CD 52F 4C3 3FB 614 4450 04D B 5 C F 9 4 6 D 4 3 52 4C 3F 61 45 04 8D 3D 96 A1 96 9 D 2F C FB 14 450 4D 8D F4 3F B6 44 04 D8 3 39 A 99 D CD 52 4C 3F 61 45 4D 8D 3D C3 B 14 50 D D3 D3 6A 19 6D 9C 52 F4 3F B6 44 04 8 3D 39 FB 614 45 4D 8D D3 96 19 96D 9C D5 F4 C3 B6 14 50 D8 D3 3 6A 61 45 04D 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 44 04 8 3D 39 A1 99 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 50 D8 D3 3 6A 99 6D C 52 4C 3F 6 44 04 8 3D 39 A1 99 D9 4D D D3 96 19 6D 9C D5 F4 3 B6 14 50 D8 D3 3 6A 99 6D CD 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 6D 9C 52 3D 396 A1 996 D9 D 2F 4C FB 614 450 4D 8D D3 96 19 96D 9C D5 F4 39 A1 99 D9 CD 52F 4C 3FB 61 45 4D 8D 3D 96 A1 96 9C D5 2F C3 6A 99 6D C 52 4C 3F 6 44 04 8D 3D 39 A1 99 D9 D 2F 4C FB 19 6D 9C D5 F4 3F B6 144 504 D8 3D 39 6A 99 6D CD 52 4C 3F 61 96 9C D5 2F C3 B 14 50 D D3 3 6A 19 6D 9C 52 F4 3F B6 44 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 9C D5 F C3 B 14 50 CD 52 4C 3F 61 445 04D 8D 3D 396 A1 996 D9 D 2F 4C3 FB 614 450 4D 52 F4C 3F B61 445 04 8D 3D 396 A1 996 D9 CD 52F 4C FB 614 450 4D 8D F4 3F B6 44 04 D8 3 39 A 99 D CD 52 4C 3F 61 45 4D 8D 3D C3 B 14 50 D D3 D3 6A 19 6D 9C 52 F4 3F B6 44 04 8 3D 39 FB 614 45 4D 8D D3 96 19 96D 9C D5 F4 C3 B6 14 50 D8 D3 3 6A 61 45 04D 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 44 04 8 3D 39 A1 99 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 50 D8 D3 3 6A 99 6D C 52 4C 3F 6 44 04 8 3D 39 A1 99 D9 4D D D3 96 19 6D 9C D5 F4 3 B6 14 50 D8 D3 3 6A 99 6D CD 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 6D 9C 52 3D 396 A1 996 D9 D 2F 4C FB 614 450 4D 8D D3 96 19 96D 9C D5 F4 39 A1 99 D9 CD 52F 4C 3FB 61 45 4D 8D 3D 96 A1 96 9C D5 2F C3 6A 99 6D C 52 4C 3F 6 44 04 8D 3D 39 A1 99 D9 D 2F 4C FB 19 6D 9C D5 F4 3F B6 144 504 D8 3D 39 6A 99 6D CD 52 4C 3F 61 96 9C D5 2F C3 B 14 50 D D3 3 6A 19 6D 9C 52 F4 3F B6 44 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 9C D5 F C3 B 14 50 CD 52 4C 3F 61 445 04D 8D 3D 396 A1 996 D9 D 2F 4C3 FB 614 450 4D 52 F4C 3F B61 445 04 8D 3D 396 A1 996 D9 CD 52F 4C FB 614 450 4D 8D F4 3F B6 44 04 D8 3 39 A 99 D CD 52 4C 3F 61 45 4D 8D 3D C3 B 14 50 D D3 D3 6A 19 6D 9C 52 F4 3F B6 44 04 8 3D 39 FB 614 45 4D 8D D3 96 19 96D 9C D5 F4 C3 B6 14 50 D8 D3 3 6A 61 45 04D 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 44 04 8 3D 39 A1 99 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 50 D8 D3 3 6A 99 6D C 52 4C 3F 6 44 04 8 3D 39 A1 99 D9 4D D D3 96 19 6D 9C D5 F4 3 B6 14 50 D8 D3 3 6A 99 6D CD 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 6D 9C 52 3D 396 A1 996 D9 D 2F 4C FB 614 450 4D 8D D3 96 19 96D 9C D5 F4 39 A1 99 D9 CD 52F 4C 3FB 61 45 4D 8D 3D 96 A1 96 9C D5 2F C3 6A 99 6D C 52 4C 3F 6 44 04 8D 3D 39 A1 99 D9 D 2F 4C FB 19 6D 9C D5 F4 3F B6 144 504 D8 3D 39 6A 99 6D CD 52 4C 3F 61 96 9C D5 2F C3 B 14 50 D D3 3 6A 19 6D 9C 52 F4 3F B6 44 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 9C D5 F C3 B 14 50 CD 52 4C 3F 61 445 04D 8D 3D 396 A1 996 D9 D 2F 4C3 FB 614 450 4D 52 F4C 3F B61 445 04 8D 3D 396 A1 996 D9 CD 52F 4C FB 614 450 4D 8D F4 3F B6 44 04 D8 3 39 A 99 D CD 52 4C 3F 61 45 4D 8D 3D C3 B 14 50 D D3 D3 6A 19 6D 9C 52 F4 3F B6 44 04 8 3D 39 FB 614 45 4D 8D D3 96 19 96D 9C D5 F4 C3 B6 14 50 D8 D3 3 6A 61 45 04D 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 44 04 8 3D 39 A1 99 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 50 D8 D3 3 6A 99 6D C 52 4C 3F 6 44 04 8 3D 39 A1 99 4D D D3 96 19 6D 9C D5 F4 3 B6 14 50 D8 D3 3 6A 99 6D 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 6D 9 3D 396 A1 996 D9 D 2F 4C FB 614 450 4D 8D D3 96 19 96D 9C 39 A1 99 D9 CD 52F 4C 3FB 61 45 4D 8D 3D 96 A1 96 9C 6A 99 6D C 52 4C 3F 6 44 04 8D 3D 39 A1 99 D9 D 19 6D 9C D5 F4 3F B6 144 504 D8 3D 39 6A 99 6D CD 96 9C D5 2F C3 B 14 50 D D3 3 6A 19 6D 9C 5 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 9C D5 CD 52 4C 3F 61 445 04D 8D 3D 396 A1 996 D9 D 2F 52 F4C 3F B61 445 04 8D 3D 396 A1 996 D9 CD 52F F4 3F B6 44 04 D8 3 39 A 99 D CD 52 4 C3 B 14 50 D D3 D3 6A 19 6D 9C 52 F4 FB 614 45 4D 8D D3 96 19 96D 9C D5 F4 C 61 45 04D 8D 3D 96 A1 96 9C D5 2F C3 44 04 8 3D 39 A1 99 D9 D 2F 4C 50 D8 D3 3 6A 99 6D C 52 4C 3F 4D D D3 96 19 6D 9C D5 F4 3 B 8D 3D 96 A1 96 9C D5 2F C3 FB 3 39 A 99 D D 2 4C F 6

Paper / Subject Code: 91002 / Computer Science:Paper I- Data Communications, Networking and Security.

Time: 3 hrs

Q.2.

Q.3.

Q.4.

71067 Total Marks: 100

N.B.

1) All questions are compulsory. 2) Figure to the right indicate marks. 3) Draw neat diagrams wherever necessary. 4) Mixing of sub-questions is not allowed.

Q.1.

Attempt any four.

20 M

a. Distinguish between Internet and Intranet.

b. Explain CRC method of Error detection. c. Write a note on FTP. d. What are the functions of network layer? e. Explain Cryptographic attacks. f. Write a note on TCP SYN DOS Attack.

Attempt any four.

20 M

a. Write a short note on TCP/IP reference model. b. Explain digital to analog conversion. c. Explain Nyquist theorem. d. Briefly describe the PCM technique. e. Explail TDM. f. List the advantages and disadvantages of fibre optics.

Attempt any four.

20 M

a. What is hamming code of Error correction? How it calculate the redundancy?

b. How is the check sum method of error detection take place? c. What are the drawbacks of stop and wait protocol? d. How does token passing protocol prevents data collision? e. Write a note on source Routing protocol. f. List the various wired Ethernet standards.

.

Attempt any four.

20 M

a. Distinguish between IPv4 and IPv6.

b. Explain Interior and Exterior Routing. c. Distinguish between UDP and TCP. d. Explain Sliding window flow control protocol. e. Explain the name resolution process in DNS. f. How http is similar to SMTP?

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4D8D3D396A1996D9CD52F4C3FB614450

3D 396 6A1 996 D9 CD 52F 4C 3FB 614 4450 39 A 99 D CD 52 4C 3F 61 4 4 39 6A1 199 6D9 9CD 52F F4C 3FB B61 445 504DD8D 6 4 6 96 A19 996 D9C CD5 52F4 4C3 3FB 614 450 04D8 8D3 3D3 A1 96 D9 D 2F C FB 61 45 4D D D 96 6A 99 D C 52 4C 3F 6 44 04 8D 3D 39 A1 D 1 5 6 A1 1996 6D9 9CD 52F F4C 3FB B61 445 04DD8D 3D 396 A19 996 D 4 3 0 A 3 3 5 C 9 4 19 96DD9C D5 2F4 C3F FB6 6144 4504 4D8 8D3DD39 96A 199 96D 9CD 96 9C D5 2F C3 B 14 50 D D3 3 6A 19 6D 9C 52 96 D9C D5 2F 4C3 FB 614 450 4D 8D3 D3 96A 19 96D 9C D52 F4 4 8 9 C 6 D D 6D 9C D52 2F4 C3F FB6 144 4504 4D8 D3DD39 96A 199 6D9 9CD 52F F4C 3FB 9C D5 F4 C3 B6 144 504 D8 D3 39 6A 199 6D CD 52 4C 3F 61 9C D5 2F4 C3 FB6 144 504 D8 D3 D39 6A 199 6D 9CD 52 F4C 3F B61 445 F D 9 2 B F CDD52 F4C C3F B61 1445 504DD8DD3D 396 6A1 1996 6D9 CD 52F 4C3 3FB 614 4450 04D B 5 C F 9 4 6 D 4 3 52 4C 3F 61 45 04 8D 3D 96 A1 96 9 D 2F C FB 14 450 4D 8D F4 3F B6 44 04 D8 3 39 A 99 D CD 52 4C 3F 61 45 4D 8D 3D C3 B 14 50 D D3 D3 6A 19 6D 9C 52 F4 3F B6 44 04 8 3D 39 FB 614 45 4D 8D D3 96 19 96D 9C D5 F4 C3 B6 14 50 D8 D3 3 6A 61 45 04D 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 44 04 8 3D 39 A1 99 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 50 D8 D3 3 6A 99 6D C 52 4C 3F 6 44 04 8 3D 39 A1 99 D9 4D D D3 96 19 6D 9C D5 F4 3 B6 14 50 D8 D3 3 6A 99 6D CD 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 6D 9C 52 3D 396 A1 996 D9 D 2F 4C FB 614 450 4D 8D D3 96 19 96D 9C D5 F4 39 A1 99 D9 CD 52F 4C 3FB 61 45 4D 8D 3D 96 A1 96 9C D5 2F C3 6A 99 6D C 52 4C 3F 6 44 04 8D 3D 39 A1 99 D9 D 2F 4C FB 19 6D 9C D5 F4 3F B6 144 504 D8 3D 39 6A 99 6D CD 52 4C 3F 61 96 9C D5 2F C3 B 14 50 D D3 3 6A 19 6D 9C 52 F4 3F B6 44 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 9C D5 F C3 B 14 50 CD 52 4C 3F 61 445 04D 8D 3D 396 A1 996 D9 D 2F 4C3 FB 614 450 4D 52 F4C 3F B61 445 04 8D 3D 396 A1 996 D9 CD 52F 4C FB 614 450 4D 8D F4 3F B6 44 04 D8 3 39 A 99 D CD 52 4C 3F 61 45 4D 8D 3D C3 B 14 50 D D3 D3 6A 19 6D 9C 52 F4 3F B6 44 04 8 3D 39 FB 614 45 4D 8D D3 96 19 96D 9C D5 F4 C3 B6 14 50 D8 D3 3 6A 61 45 04D 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 44 04 8 3D 39 A1 99 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 50 D8 D3 3 6A 99 6D C 52 4C 3F 6 44 04 8 3D 39 A1 99 D9 4D D D3 96 19 6D 9C D5 F4 3 B6 14 50 D8 D3 3 6A 99 6D CD 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 6D 9C 52 3D 396 A1 996 D9 D 2F 4C FB 614 450 4D 8D D3 96 19 96D 9C D5 F4 39 A1 99 D9 CD 52F 4C 3FB 61 45 4D 8D 3D 96 A1 96 9C D5 2F C3 6A 99 6D C 52 4C 3F 6 44 04 8D 3D 39 A1 99 D9 D 2F 4C FB 19 6D 9C D5 F4 3F B6 144 504 D8 3D 39 6A 99 6D CD 52 4C 3F 61 96 9C D5 2F C3 B 14 50 D D3 3 6A 19 6D 9C 52 F4 3F B6 44 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 9C D5 F C3 B 14 50 CD 52 4C 3F 61 445 04D 8D 3D 396 A1 996 D9 D 2F 4C3 FB 614 450 4D 52 F4C 3F B61 445 04 8D 3D 396 A1 996 D9 CD 52F 4C FB 614 450 4D 8D F4 3F B6 44 04 D8 3 39 A 99 D CD 52 4C 3F 61 45 4D 8D 3D C3 B 14 50 D D3 D3 6A 19 6D 9C 52 F4 3F B6 44 04 8 3D 39 FB 614 45 4D 8D D3 96 19 96D 9C D5 F4 C3 B6 14 50 D8 D3 3 6A 61 45 04D 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 44 04 8 3D 39 A1 99 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 50 D8 D3 3 6A 99 6D C 52 4C 3F 6 44 04 8 3D 39 A1 99 D9 4D D D3 96 19 6D 9C D5 F4 3 B6 14 50 D8 D3 3 6A 99 6D CD 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 6D 9C 52 3D 396 A1 996 D9 D 2F 4C FB 614 450 4D 8D D3 96 19 96D 9C D5 F4 39 A1 99 D9 CD 52F 4C 3FB 61 45 4D 8D 3D 96 A1 96 9C D5 2F C3 6A 99 6D C 52 4C 3F 6 44 04 8D 3D 39 A1 99 D9 D 2F 4C FB 19 6D 9C D5 F4 3F B6 144 504 D8 3D 39 6A 99 6D CD 52 4C 3F 61 96 9C D5 2F C3 B 14 50 D D3 3 6A 19 6D 9C 52 F4 3F B6 44 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 9C D5 F C3 B 14 50 CD 52 4C 3F 61 445 04D 8D 3D 396 A1 996 D9 D 2F 4C3 FB 614 450 4D 52 F4C 3F B61 445 04 8D 3D 396 A1 996 D9 CD 52F 4C FB 614 450 4D 8D F4 3F B6 44 04 D8 3 39 A 99 D CD 52 4C 3F 61 45 4D 8D 3D C3 B 14 50 D D3 D3 6A 19 6D 9C 52 F4 3F B6 44 04 8 3D 39 FB 614 45 4D 8D D3 96 19 96D 9C D5 F4 C3 B6 14 50 D8 D3 3 6A 61 45 04D 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 44 04 8 3D 39 A1 99 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 50 D8 D3 3 6A 99 6D C 52 4C 3F 6 44 04 8 3D 39 A1 99 4D D D3 96 19 6D 9C D5 F4 3 B6 14 50 D8 D3 3 6A 99 6D 8D 3D 96 A1 96 9C D5 2F C3 FB 14 450 4D D3 D3 96A 19 6D 9 3D 396 A1 996 D9 D 2F 4C FB 614 450 4D 8D D3 96 19 96D 9C 39 A1 99 D9 CD 52F 4C 3FB 61 45 4D 8D 3D 96 A1 96 9C 6A 99 6D C 52 4C 3F 6 44 04 8D 3D 39 A1 99 D9 D 19 6D 9C D5 F4 3F B6 144 504 D8 3D 39 6A 99 6D CD 96 9C D5 2F C3 B 14 50 D D3 3 6A 19 6D 9C 5 D9 D 2F 4C FB 61 45 4D 8D D 96 1 96 9C D5 CD 52 4C 3F 61 445 04D 8D 3D 396 A1 996 D9 D 2F 52 F4C 3F B61 445 04 8D 3D 396 A1 996 D9 CD 52F F4 3F B6 44 04 D8 3 39 A 99 D CD 52 4 C3 B 14 50 D D3 D3 6A 19 6D 9C 52 F4 FB 614 45 4D 8D D3 96 19 96D 9C D5 F4 C 61 45 04D 8D 3D 96 A1 96 9C D5 2F C3 44 04 8 3D 39 A1 99 D9 D 2F 4C 50 D8 D3 3 6A 99 6D C 52 4C 3F 4D D D3 96 19 6D 9C D5 F4 3 B 8D 3D 96 A1 96 9C D5 2F C3 FB 3 39 A 99 D D 2 4C F 6

Paper / Subject Code: 91002 / Computer Science:Paper I- Data Communications, Networking and Security.

Q.5.

71067

Attempt any four.

20 M

a. What are the goals of network security? Write a note on Write a note on non-cryptanalytic attack. b. Explain the asymmetric key cryptography process. c. Describe the architecture of SSL. d. What are the services provided by IPSec ? e. Name three types of messages in PGP and explain its purpose. f. What is computer virus? List their types.

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