BCS-052
1. (a)
Why flow control is used at both
Data-Link layer and Transport Layer of OSI model? Also, compare the working of
Sliding Window protocol of Data-Link layer and Transport layer.
(8 Marks)
(b) Explain the various HTTP request methods
using an example of each. (6 Marks)
(c) How a domain name
is mapped to its equivalent network address? Explain using an example.(4 Marks)
(d) Suppose the class
B network uses 20 out of 32 bits to define a network address. How many Class B
Network are possible in this case? (2
Marks)
2. (a) List and
describe all elementary socket systems calls and data transfer calls. (8 Marks)
(b) Write a
connection-oriented client and server algorithm (using socket system calls)
where client program interact with the Server as given below:
·
A client machine
begins by sending a request to calculate a factorial of a number; the server
sends back a confirmation of the service (if server is having any method for
calculating factorial) to the respective client.
·
If Server
confirmation is positive, client sends a number and server replies as the
factorial of that number to the client.
3. (a) Compare the security features, reliability
approaches and delivery mechanisms of IPv4 and IPv6.
(6 Marks)
(b) Why do LANs tend
to use broadcast networks? Why not use networks consisting of multiplexers and
switches. (6 Marks)
(c) Identify the Address Class of the following
IP addresses:
(a)
255.255.190.0
(b)
216.111.52.12
(c)
150.156.10.10
(d)
92.2.1.1 (4 Marks)
(d) Why
would an application use UDP instead of TCP? Also, explain how can TCP handle
urgent data? (4 Marks)
4. (a) Assume you
are chief network administrator of a company. This company is having its
offices in different cities. Each office is having more than 50 machines and a
server. These servers and network of all offices are further controlled and
managed by the main server. Discuss the security issues and threats in such
network. Make a chart to explain the available solutions for each issue/threat.
(10 Marks)
(b) Describe the
activities to be performed at every layer in the TCP/IP model when information
flows from layer to another layer. (4
Marks)
(c) The size of the
option field of an IP diagram is 20 bytes. What is the value of HLEN field in
binary? (2 Marks)
(d) Write short notes
on following:
(i) ICMP
(ii) IP Encapsulation
(iii) Sockets
(iv) SNMP
****************************************************************
Note: Answer
with Dotcom Books
www.dotcombooks4u.com
(Last 5 year
solved question paper with Assignment solutions)
9825183881
***************************************************************
No comments:
Post a Comment