Cnp Quiz 4 (Cse A)
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- 1.If destination receives a datagram that did not visit one of the routers listed in strict-source-route option filed then
- A.
It redirects the datagram to that router which is not visited
- B.
It simply discards the datagram
- C.
It processes the datagram in usual manner
- D.
It accepts the datagram but warns the router sending the datagram
- 2.Which IP address an intermediate router inserts if record-route option is being used?
- A.
IP address of the network to which the outgoing link is connected
- B.
IP address of the network to which the incoming link is connected
- C.
IP address of its outgoing interface
- D.
IP address of the next router
- 3.What can appear after the option ‘end-of-option’ in IPv4 datagram?
- A.
No-operation option
- B.
End-of-option option
- C.
Timestamp option
- D.
Payload
- 4.If fragmentation occurs then which fields are changed in IPv4 header (assume empty option field)?
- A.
Total length, M bit of flag, Fragmentation offset, TTL and Header Checksum
- B.
HLEN, Total length, Fragmentation offset, TLL and Header Checksum
- C.
Total length, Identification, Fragmentation offset, TTL and Header Checksum
- D.
Identification, Total length, M bit of flag and Fragmentation offset
- 5.To determine the number of the last byte in a fragment we need to know
- A.
HLEN
- B.
Fragmentation offset
- C.
Total length
- D.
All the above
- 6.What is the maximum possible size of the data portion of the IPv4 datagram?
- A.
65,515 bytes
- B.
65,535 bytes
- C.
65,475 bytes
- D.
65,460 bytes
- 7.In IPv4 layer, datagram is of
- A.
Fixed length
- B.
Variable length
- C.
Global length
- D.
0 length
- 8.An IP router with a Maximum Transmission Unit (MTU) of 1500 bytes has received an IP packet of size 4404 bytes with an IP header of length 20 bytes. The values of the relevant fields in the header of the third IP fragment generated by the router for this packet are
- A.
MF bit: 1, Datagram Length: 1424; Offset: 185
- B.
MF bit: 0, Datagram Length: 1444; Offset: 370
- C.
MF bit: 1, Datagram Length: 1500; Offset: 37
- D.
MF bit: 0, Datagram Length: 1424; Offset: 2960
- 9.Which field helps to check rearrangement of the fragments?
- A.
Fragmentation offset
- B.
Flag
- C.
TTL
- D.
Identifier
- 10.Each router in the list must be visited, but the datagram can visit other routers as well. This statement is true for:
- A.
No-Operation Option
- B.
Strict-source route
- C.
Loose source route
- D.
Timestamp
- 11.Which field in IPv4 header allows de-multiplexing process when datagram reaches destination host
- A.
Timestamp
- B.
TTL
- C.
Fragmentation Offset
- D.
Protocol
- 12.For an IPv4 datagram arrived the values of fragmentation offset, HLEN and total length fields are 200, 5 and 500 respectively. What is the number of first byte?
- A.
500
- B.
200
- C.
1600
- D.
800
- 13.The TTL field has value 10. How many routers (max) can process this datagram?
- A.
11
- B.
5
- C.
10
- D.
1
- 14.A datagram is fragmented into three smaller datagrams. Which of the following is true?
- A.
The do not fragment bit is set to 1 for all three datagrams.
- B.
The identification field is the same for all three datagrams.
- C.
The more fragment bit is set to 0 for all three datagrams.
- D.
The offset field is the same for all three datagrams.
- 15.A router reads the _______ address on a packet to determine the next hop.
- A.
MAC
- B.
Source
- C.
IP
- D.
ARP
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