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Computer Networks Questions & Answers – Packet Switching & Circuit Switching

 Computer Networks Questions & Answers – Packet Switching & Circuit Switching


This set of Computer Networks Questions & Answers focuses on “Packet Switching and Circuit Switching”.



1)  A local telephone network is an example of a          network

a)  Packet switched

b)  Circuit switched

c)  both of the mentioned

d)  none of the mentioned View Answer

Answer: a Explanation: None.

 


 

2)  Most packet switches use this principle

a)  Stop and wait

b)  Store and forward

c)  Both of the mentioned

d)  None of the mentioned View Answer

Answer: b

Explanation: The packet switch will not transmit the first bit to outbound link until it recieves the entire packet.

 

3)  If there are N routers from source to destination, total end to end delay in sending packet P(L->number of bits in the packet R-> transmission rate)

a)  N

b)  (N*L)/R

c)  (2N*L)/R

d)  L/R

View Answer

Answer: b Explanation: None.

multiple-choice-questions-of-computer

 

4)  Method(s) to move data through a network of links and switches

a)  Packet switching

b)  Circuit switching

c)  Line switching

d)  Both a and b View Answer

Answer: d Explanation: None.

 

5)  The resources needed for communication between end systems are reserved for the duration of session between end systems in                          


a)  Packet switching

b)  Circuit switching

c)  Line switching

d)  Frequency switching View Answer

Answer: b Explanation: None.

 

6)  As the resouces are reserved between two communicating end systems in circuit switching, this is achieved

a)  authentication

b)  guaranteed constant rate

c)  reliability

d)  store and forward View Answer

Answer: b Explanation: None.

 

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7)  In                  resources are allocated on demand.

a)  packet switching

b)  circuit switching

c)  line switching

d)  frequency switching View Answer

Answer: a

Explanation: In packet switching there is no reservation.

 

 

 

Computer Networks Questions & Answers – IPv4

This set of Computer Networks Questions & Answers focuses on “IPv4″.

 

1.  Which of the following is not applicable for IP?

a)  Error reporting

b)  Handle addressing conventions

c)  Datagram format

d)  Packet handling conventions View Answer

Answer: a

Explanation: Error reporting is handled by ICMP.


2.  Which of the following field in IPv4 datagram is not related to fragmentation?

a)  Flags

b)  Offset

c)  TOS

d)  Identifier View Answer

Answer: c

Explanation: TOS-type of service identifies the type of packets.

 

3.   The TTL field has value 10. How many routers (max) can process this datagram?

a)  11

b)  5

c)  10

d)  1

View Answer

Answer: c

Explanation: TTL field is decremented by one each time the datagram is processed by a router.

 

4.   If the value in protocol field is 17, the transport layer protocol used is .

a)  TCP

b)  UDP

c)  Either of the mentioned

d)  None of the mentioned View Answer

Answer: b

Explanation: For TCP it is 6.

 

5.   The data field can carry which of the following?

a)  TCP segemnt

b)  UDP segment

c)  ICMP messages

d)  None of the mentioned View Answer

Answer: c

Explanation: Data field usually has tranaport layer segment, but it can also carry ICMP messages.

 

6.  What should be the flag value to indicate the last fragment?

a)  0

b)  1


c)  TTl value

d)  None of the mentioned View Answer

Answer: a

Explanation: flag=0 indicates that it is the last fragment.

 

7.  Which of these is not applicable for IP protocol?

a)  is connectionless

b)  offer reliable service

c)  offer unreliable service

d)  None of the mentioned View Answer

Answer: b

Explanation: Ip offers unreliable service.

 

8.   Fragmentation has following demerits

a)  complicates routers

b)  open to DOS attack

c)  overlapping of fragments.

d)  All of the mentioned View Answer

Answer: d

Explanation: Fragmentation makes the implementation complex and also can create DOS attack.

 

9.  Which field helps to check rearrangement of the fragments?

a)  offset

b)  flag

c)  TTL

d)  identifer View Answer

Answer: a

Explanation: offset field specifies where the fragment fits in the original datagram.

 

 

 

Computer Networks Questions & Answers – IPv6

This set of Computer Networks Questions & Answers focuses on “IPv6″.

 

1.   The size of IP address in IPv6 is

a)  4bytes


b)  128bits

c)  8bytes

d)  100bits View Answer

Answer: b

Explanation: An IPv6 address is 128 bits long.

 

2.   The header length of an IPv6 datagram is       .

a)  10bytes

b)  25bytes

c)  30bytes

d)  40bytes View Answer

Answer: d

Explanation: IPv6 datagram has fixed header length of 40bytes, which results is faster processing of the datagram.

 

3.   In the IPv6 header,the traffic class field is similar to which field in the IPv4 header?

a)  Fragmentation field

b)  Fast-switching

c)  ToS field

d)  Option field View Answer

Answer: c

Explanation: This field enables to have different types of IP datagram.

 

4.   IPv6 doesnot use           type of address

a)  Broadcast

b)  Multicast

c)  Anycast

d)  None of the mentioned View Answer

Answer: a

Explanation: Broadcast has been eliminated in IPv6.

 

5.   These are the features present in IPv4 but not in IPv6.

a)  Fragmentation

b)  Header checksum

c)  Options


d)  All of the mentioned View Answer

Answer: d

Explanation: All the features are only present in IPv4 and not IPv6.

 

6.   The         field determines the lifetime of IPv6 datagram

a)  Hop limit

b)  TTL

c)  Next header

d)  None of the mentioned View Answer

Answer: a

Explanation: The Hop limit value is decremented by one by a router when the datagram is forwaded by the router. When the value becomes zero the datagram is discarded.

 

7.   Dual-stack approach refers to

a)  Implementing Ipv4 with 2 stacks

b)  Implementing Ipv6 with 2 stacks

c)  Node has both IPv4 and IPv6 support

d)  None of the mentioned View Answer

Answer: c

Explanation: dual-stack is one of the approach used to support IPv6 in already existing systems.

 

8.   Suppose two IPv6 nodes want to interoperate using IPv6 datagrams but are connected to each other by intervening IPv4 routers. The best solution here is

a)  use dual-stack approach

b)  Tunneling

c)  No solution

d)  Replace the system View Answer

Answer: b

Explanation: The IPv4 routers can form a tuunel.

 

9.   Teredo is an automatic tunneling technique. In each client the obfuscated IPv4 address is represented by bits

a) 96 to 127

b)  0 to 63

c)  80 to 95


d)  64 to 79 View Answer

Answer: a

Explanation: Bits 96 to 127 in the datagram represents obfuscated 1Pv4 address.

 

3)   This topology requires multipoint connection

a)   Star

b)   Mesh

c)   Ring

d)   Bus

View Answer

Answer: d Explanation: None.

4)   Data communication system spanning states, countries, or the whole world is

a)   LAN

b)   WAN

c)   MAN

d)   None of the mentioned View Answer

Answer: b

Explanation:Wide area network(WAN) covers the whole of the world network.

5)   Data communication system within a building or campus is

a)   LAN

b)   WAN

c)   MAN

d)   None of the mentioned View Answer

Answer: a Explanation: None.

6)   Expand WAN

a)   World area network

b)   Wide area network

c)   Web area network

d)   None of the mentioned View Answer

Answer: b Explanation: None.


यदि आप पिछले या फिर Next --- Daily use English Sentence बाले पोस्ट को पढना चाहते हैं, तो नीचे दिए गए link पर click करके पढें ।

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