Computer Networks Questions & Answers – Transition from IPV4 to IPV6 MCQ أسئله شبكات بالأجابات الجزء السابع و الاربعون

Computer Networks Questions & Answers – Transition from IPV4 to IPV6

1. The main reason for transition from IPv4 to IPv6 is
a) Huge number of systems on the internet
b) Very low number of system on the internet
c) Providing standard address
d) None of the mentioned

Answer: a
Explanation: Due to huge number of systems on the internet, transition from IPv4 to IPv6 happens.

2. Which of the following is not a transition strategies?
a) Dual stack
b) Tunnelling
c) Conversion
d) Header translation

Answer: c
Explanation: Dual stack, tunnelling and header translation are the only three transition strategies.

3. To determine which version to use when sending a packet to a destination, the source host queries which of the following?
a) Dual stack
b) Domain Name Server
c) Header information
d) All of the mentioned

Answer: b
Explanation: Source host queries DNS to determine which version to use when sending a packet to a destination.

4. The strategy used when two computers using IPv6 want to communicate with each other and the packet must pass through a region that uses IPv4 is
a) Dual stack
b) Header translation
c) Conversion
d) Tunnelling

Answer: d
Explanation: Tunnelling is used when two computers using IPv6 want to communicate with each other and the packet must pass through a region that uses IPv4.

5. The correct format of packet in tunnel that uses IPv4 region is
1. IPv6 header
2. Payload
3. IPv4 header
a) 3-1-2
b) 3-2-1
c) 1-2-3
d) 1-3-2

Answer: a
Explanation: In tunnel with IPv4 region, IPv6 packet will be encapsulated with IPv4 header.

6. ___________ is necessary when the sender wants to use IPv6, but the receiver does not understand IPv6.
a) Dual stack
b) Header translation
c) Conversion
d) Tunnelling

Answer: b
Explanation: Header translation is used when the sender wants to use IPv6, but the receiver does not understand IPv6.

7. Header translation uses ___________ to translate an IPv6 address to an IPv4 address.
a) IP address
b) Physical address
c) Mapped address
d) Any of the mentioned

Answer: c
Explanation: Mapped address is used to translate an IPv6 address to an IPv4 address.

8. Which of the following is not the step in Header translation procedure?
a) The IPv6 mapped address is changed to an IPv4 address by extracting the rightmost 32bits
b) The value of the IPv6 priority field is discarded
c) The type of service field in IPv4 is set to zero
d) The IPv6 flow label is considered

Answer: d
Explanation: In header translation procedure, IPv6 flow label is ignored.

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