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السبت، 6 يوليو 2019

Computer Networks Questions & Answers – IPv6 MCQ أسئله شبكات بالأجابات الجزء الثالث و الاربعون


Computer Networks Questions & Answers – IPv6


1. The size of IP address in IPv6 is
a) 4bytes
b) 128bits
c) 8bytes
d) 100bits
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
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
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
5. These are the features present in IPv4 but not in IPv6.
a) Fragmentation
b) Header checksum
c) Options
d) All of the mentioned
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
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
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
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
Answer: a
Explanation: Bits 96 to 127 in the datagram represents obfuscated 1Pv4 address.


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