FINALTERM EXAMINATION
Fall 2008
CS610- Computer Network
Ref No:
Time: 120 min
Marks: 70
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Center: | ||
Exam Date: | ||
Question No: 1 ( Marks: 1 ) - Please choose one
Computer networks are often called -------------- because they use packet technology.
► Ethernet
► Switch networks
► Packet networks
► None of the given
Question No: 2 ( Marks: 1 ) - Please choose one
A network uses a ------arranges for computers to be connected in a closed loop.
► Star Topology
► Ring Topology
► Bus Topology
► None of the given
Question No: 3 ( Marks: 1 ) - Please choose one
An ------------method, the network hardware designers specify how type information is included in the frame and the value use to identify various frame types.
► Explicit frame type
► Ideal frame type
► Implicit frame type
► None of the given
Question No: 4 ( Marks: 1 ) - Please choose one
An interface for thin Ethernet must have an ____________ connector , and must generate signals according to the_____________ specification.
► RJ-45, 10 Base T
► RJ-45, 10 Base 5
► BNC, 10 Base 2
► BNC, 10 Base T
Question No: 5 ( Marks: 1 ) - Please choose one
A Bridge forwards or filters a frame by comparing the information in its address table to the frame’s__________
► Layer 2 source address
► Source node’s physical address
► Layer 2 destination address
► Layer 3 destination address
Question No: 6 ( Marks: 1 ) - Please choose one
Most WAN systems include a mechanism that can be used to eliminate the common case of duplication routing is called___________
► Hierarchal address
► Default route
► Shortest path
► None of the given
Question No: 7 ( Marks: 1 ) - Please choose one
________ of TCP/IP layering model, corresponds to basic network hardware.
► Physical Layer
► Network Interface Layer
► Internet Layer
► Transport Layer
Question No: 8 ( Marks: 1 ) - Please choose one
_______ protocols of TCP/IP layering model specify how to ensure reliable transfer.
► Physical Layer
► Network Interface Layer
► Internet Layer
► Transport Layer
Question No: 9 ( Marks: 1 ) - Please choose one
________is called an end-to-end protocol because it provide a connection directly from an application on one computer to an application on a remote computer.
► IP
► UDP
► TCP
► None of the given
Question No: 10 ( Marks: 1 ) - Please choose one
____________ uses distance vector approach to define routing
► BGP
► OSPF
► RIP
► None of the given
Question No: 11 ( Marks: 1 ) - Please choose one
_______ is ideal in a situation where the group is small and all members are attached to contiguous Local Area Networks.
► Flood-and -Prune
► Configuration-and -Tunneling
► Core-Based Discovery
► None of the given
Question No: 12 ( Marks: 1 ) - Please choose one
Router that decrements TTL to __ sends ICMP time exceeded message, with router’s address as source address
► 3
► 2
► 1
► 0
Question No: 13 ( Marks: 1 ) - Please choose one
Protocol addresses are abstractions provided by ___________.
► hardware
► software
► operating system
► internet
Question No: 14 ( Marks: 1 ) - Please choose one
Although message exchange can be used to bind addresses, sending a request for each binding is hopelessly inefficient.
► True
► False
Question No: 15 ( Marks: 1 ) - Please choose one
ARP is almost always used to bind a ___-bit IP address to a ___-bit Ethernet address.
► 32, 48
► 24, 32
► 32, 64
► 32, 128
Question No: 16 ( Marks: 1 ) - Please choose one
In the 1970s large organizations began to acquire multiple networks. Each network in the organization formed island. Employees needed to choose a computer appropriate for each task. So they needed multiple screens, keyboards and computers.
► False
► True
Question No: 17 ( Marks: 1 ) - Please choose one
In which method of Address Resolution Protocol the protocol address is determined by hardware address?
Were "T" stands for Table lookup, "C" for Closed-form Computation and "D" for Data Exchange?
► T
► D
► C
► T, C
Question No: 18 ( Marks: 1 ) - Please choose one
The general form of an IP datagram is with a header followed by data. The header contains information that controls where and how the datagram is to be sent.
► True
► False
Question No: 19 ( Marks: 1 ) - Please choose one
To save traffic, an EGP does not summerize routing information from the autonomous system before passing it to another autonomous system.
► True
► False
Question No: 20 ( Marks: 1 ) - Please choose one
Which of the following is a correct representation of the IPv6?
► 105.220.136.100.255.255.255.255.0.0.18.128.140.10.255.255
► 105.220.136.100.255.255.255.256.0.0.18.128.140.10.255.255
► 105.220.136.100.255.255.255.255.0.0.18.128.140.10.255.255.256
► 105.220.136.100.255.255.255.255.0.0.18.128.140.10.255
Question No: 21 ( Marks: 2 )
Is there a comparision between TCP/IP reference model and ISO reference model.
Question No: 22 ( Marks: 2 )
How can a datagram be transmitted across a physical network that does not understand the datagram format?
Question No: 23 ( Marks: 2 )
What is the basic concept of Twice NAT (Network Address Translation)?
Question No: 24 ( Marks: 3 )
What format is used for an internet packet?
Question No: 25 ( Marks: 3 )
“To achieve a hierarchy, OSPF allows an autonomous system to be partitioned for routing purposes”. Does this feature make OSPF more complex or powerful?
Question No: 26 ( Marks: 3 )
Why does IPv6 use separate Extension Headers?
Question No: 27 ( Marks: 5 )
Consider the IP addresses: 178.200.127.5 and the corresponding subnet masks 255.255.255.0, then find out the following:
a. The number of bits used for subnetting.
b. Total number of host in the subnet
c. The network address of the subnet.
d. The subnet address of the IP address.
Question No: 28 ( Marks: 5 )
How does IP software reassemble fragments that arrive out of order?
Question No: 29 ( Marks: 5 )
Write down the comparison of Distance- vector and Link – state algorithm?
Question No: 30 ( Marks: 10 )
Descibe in detail what is the purpose of the following table? What sort of information can be extracted?
Question No: 31 ( Marks: 10 )
List down and describe atleast five charachteristics of Routing Information Protocol.
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