CS610 – Computer Network
In CS610 Computer Network we have you covered with Digitized Past Papers From Fall of Mid Term and Final Term.
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FINAL QUIZ PREPARATION BY JAHANZAIB ASHIQ
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POSTED DATE:20-01-2019 IDEA SOLUTION
Question – 1
You are required to find the number of subnets and useable hosts per subnet that we can get from the following addresses in given table.
| Addresses with CIDR notation and associated subnet mask | Subnets | Useable hosts per subnet |
| 172.19.0.0/27 | 30 | |
| 192.168.12.0/25 | 126 | |
| 170.21.0.0 255.255.255.192 | 62 | |
| 50.2.0.0 255.255.224.0 | 8190 |
Question – 2
Ali is working in an “ABC” company as an IT administrator. Purchase department of “ABC” company is located 2 buildings away from the head office. Ali has assigned a task to connect the two LANs, i.e. head office and the purchase department. Here, for this he used bridge, pair of fiber modems and an optical fiber.
Keeping in view the above scenario, answer the following questions:
- A new employee “Ahmad” is hired in the purchase department of “ABC” Company and for him Ali wants to add another computer in the LAN of the purchase department. To add a computer in the network should Ali change the wiring of LAN?
Answer: No, Because Only RJ-45 connector with wire is require which connects computer with modem through this wir
- Addition in the number of computers in purchase department, will affect the efficiency of head office’s LAN? Give your answer is Yes/No with appropriate reason.
Answer: In network science, the efficiency of network is a measure of how efficiently it exchanges the information. The concept of efficiency can be applied to both local and global scales in a network. On a global scale, efficiency quantifies the exchange of information across the whole network where information is concurrently exchange. The local efficiency quantifies a network’s resistance to failure on a small scale.
Question no. 31 (2 Marks)
Find the class in 00000001.001011.1001.111
Answer: (Page 87)
Class A
Question no. 32 (2 Marks)
What is the difference between unicast and multicast?
Answer:- (Page 114)
Unicast is used for single destination computer while multicast is used for multiple destinations
Question no. 33 (2 Marks)
What is the basic concept of Twice NAT (Network Address Translation)?
Answer:- rep
Question no. 34 (2 Marks)
What is the role of DMA in NIC?
Answer:- (Page 34)
It may use DMA to copy frame data directly from main memory and copy data directly into main memory.
Question no. 35 (2 Marks)
What is the function of Hope count matrix in routing information protocol?
Answer:- Click here for detail
RIP uses a hop count metric to measure the distance to a destination
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Question no. 36 (Marks2)
What is the scale or level of requirement in of IPv6?
Answer:- (Page 110)
Scale is also dramatically changed. Size from a few tens to a few tens of millions of computers has been
revolutionized. Speed has increased from 56Kbps to 1Gbps. Also there is an increased frame size in hardware.
Question No: 37 (3 Marks)
Change the following into equivalent binary
154.31.161.13
202.32.15.7
192.168.1.5
154.31.161.13
Answer:
Binary: 10011010 00011111 10100001 00001101
202.32.15.7
Answer:
Binary: 11001010 00100000 00001111 00000111
192.168.1.5
Answer:
Binary: 11000000 10101000 00000001 00000101
Question No: 38 (3 Marks)
What is the meaning of Facilities for Transit Routing as a characteristic of the Border Gateway
Protocol?
Answer:- Click here for Detail
Facilities For Transit Routing
classifies each AS as a transit system if it agrees to pass traffic through, or as a stub system if it does not BGP
allows a corporation to classify itself as a stub even if it is multi-homed (refuse to accept transit traffic)
Question No: 39 (3 Marks)
In internet routing how does a host join or leave a group?
Answer:- rep
Question No: 40 (3 Marks)
Name the six services provided by TCP
Answer:- (Page 123)
Following are the services provided by TCP:
• Connection-oriented service
• Point-to-point
• Complete reliability
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• Full-duplex communication
• Stream interface
• Reliable connection startup
• Graceful connection shutdown
Question No: 41 (3 Marks)
In internet routing how does a host join or leave a group?
Answer:- rep
Question No: 42 (3 Marks)
What are the distance limitations in Fiber Optic?
Answer: Page 48
Optical fiber can extend across several kilometers because delays on optical fiber are very low and bandwidth is
very high.
Question No: 43 (5 Marks)
What are the three approaches for datagram forwarding?
Answer:- (Page 143)
FLOOD-AND-PRUNE
CONFIGURATION-AND-TUNNELING
CORE-BASED DISCOVERY
Question No: 45 (5 Marks)
Write down the comparison of Distance- vector and Link – state algorithm?
Answer: Page 64
COMPARISON:
DISTANCE-VECTOR ROUTING:
• It is very simple to implement.
• Packet switch updates its own routing table first.
• It is used in RIP.
LINK-STATE ALGORITHM:
• It is much more complex.
• Switches perform independent computations.
• It is used in OSPF.
CS610 Current Final Term Papers
Fall 2011
Define simplex and full duplex connection? (2 Marks)
Answer:- rep