IBPS IT SO Study material- Computer Networks-IPv4

IBPS IT SO Study material- Computer Networks

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

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

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

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

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

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

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

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

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

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

All the best for your exams @Mission IT SO 2016