Download Protocols, MTU, Bit Errors-Wireless Networking, LAN and Computer Networks-Quiz and more Exercises Data Communication Systems and Computer Networks in PDF only on Docsity!
- Carrying of digital diaries is not allowed
- Mobile phones will not be allowed in the examination hall.
- You can answer questions on this sheet to save your time
Q No: 1 [3 marks] Which protocols are used by the applications:
Layer/Application Telnet HTTP TFTP Transport Layer: Network Layer:
Q No: 2 [6 mark] What is MTU? What is the purpose of fragmentation? And what is segmentation?
Q No: 3 [4 marks] Encircle the bit errors and underline the burst errors Transmitted Data: 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
Received Data: 0 1 0 0 0 1 0 0 0 1 0 1 0 0 0 0 0 0 0 1 1 1 0 1 0 0
P: 1
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What are the major responsibilities of a) Datalink layer of OSI model:
b) Transport Layer of OSI model:
Q No: 5 [6 marks] In CRC error detection scheme encode bits 10110011011 using polynomial P(x) = x^4 + x^3 + x
Q No: 6 [4 marks] Why two different interfaces were defined in ISDN? What are these two interfaces? What are their composition and data rates?
docsity.com P: 2
How does VP ATM switch performs switching? Please show with the help of a diagram.
Q No: 12 [4 marks] Probability that a bit is received in error is 0.001. What is the probability that a frame of size “512” bits is received with no errors?
Q No: 13 [6 marks] A channel has a data rate of 8 kbps and a propagation delay of 25 ms. For what range of frame sizes does “Continuous Flow Control with Window Size of 7” give an efficiency of at least 55%?
Q No: 14 [4 marks] What is ARP and how does RARP work?
docsity.com P: 4
Q No: 15 [8 mark] Define the the following QoS parameters used in ATM:
- Peak Cell Rate
- Cell Variation Delay Tolerance
- Cell Loss Ratio
- Cell Delay Variation
Q No: 16 [5 marks] An analog cellular system has a total of 33 MHz of bandwidth and uses two 25-kHz simplex channels to provide full duplex voice and control channels. What is the number of channels available per cell for a frequency reuse factor of (a) 4 cells (b) 7 cells (c) 12 cells
Q No: 17 [1+1 marks] When “ICMP: Redirect” message is used?
A packet is received with error (CRC failed) what ICMP will be sent to notify the sender? Please provide reason.
P: 5
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Discuss ATM technology with the focus on following stuff:
- Vision of ATM
- ATM cell size and fomat
- ATM Switching
P: 7
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Your company has bought IP 201.0.0.0 from IANA. Design a network for your company that has 20 departments. All of them should be on separate subnets
- What will be the subnet mask
- What is the first IP address of the first, second and last subnet
- What is the last IP address of the first, second and last subnet
- Also write the broadcast address of all the subnets
docsity.com P: 8
