Test Papers / Previous Question Papers of IGNOU CS75 Intranet Administration December 2005

BACHELOR IN COMPUTER APPLICATIONS
Term-End Examination

December, 2005

CS75 (S) : INTRANET ADMINISTRATION

Time: 2 hours
Maximum Marks: 75

1. (a) What are the various layers of a TCP/IP protocol suit ? Write any two functionalities of each. (5)

(b) If a LAN has a subnet mask of 255.255.255.128, how many hosts are there per subnet ? What is the use of a 0.0.0.0 address? What is multicasting? (5)

(c) Explain the address resolution mechanism in a DNS Server. Why do we need a Secondary DNS Server in an Internet ? (3)

(d) What is the significance of the host table in an Internet/Intranet ? (2)

2. (a) How does a firewall work in an intranet to maintain security ? Explain different components of a firewall. (5)

(b) Explain the dotted notation used in IP addressing. Find the number of networks that can exist in classes A, B, C. (4)

(c) Explain the working principle of WAP. Give any three applications of WAP. (6)

3. (a) Compare the mechanism of transferring data using TCP and UDP protocols, with the help of a suitable diagram. (5)

(b) What is GPRS ? Give any two distinct applications of GPRS. (3)

(c) How is the Distributed mail system protocol different from Simple mail transfer protocol ? Give suitable examples for each. (7)

4. (a) What are the different E-commerce protocols ? How do they help in business development in lnternet ? (7)

(b) What is a digital signature ? How is it useful to provide authentication on Intranet/Internet ? Explain the process of creation and authentication of a digital signature using a suitable example. (8)

5. (a) What are the uses of the following commands in an Intranet/Internet ? (5)
(i) POST in HTTP
(ii) LINK in HTTP
(iii) HEAD in HTTP
(iv) LIST in POP
(v) TOP in POP

(b) What is CDMA ? Give any four advantages of CDMA over GSM. (5)

(c) Explain the architecture of SMLI (Stateful Multi-Layer Inspection) firewall with the help of a diagram. (5)