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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