# Recent questions tagged ipv6

1
To address the limitations of IP version 4, a major effort had to be undertaken via IETF that resulted in the design of IP version 6 and there are still is significant reluctance in the adoption of this new version. However, no such major effort is needed to address the limitations of TCP. Explain why this is the case.
2
When the IPv6 protocol is introduced, does the ARP protocol have to be changed? If so, are the changes conceptual or technical?
3
The Protocol field used in the IPv4 header is not present in the fixed IPv6 header. Why not?
4
IPv6 uses 16-byte addresses. If a block of 1 million addresses is allocated every picosecond, how long will the addresses last?
5
When we use ipv6 and ipv4 together with the help of tunneling. So if the source set the hop count so will tunnel decrement the hop count. And if tunnel decrement it so wheater it decrement at both start and end of tunnel. Suppose source set hop limit to 16 and there are 2 router and tunnel on the path. So what will be the hop count after received by receiver.
6
Consider the following IP header(hexadecimal format) from an IP packet received, in which the checksum is set to 0. “4500 003C 1C46 4000 4006 0000 AC10 0A63 AC10 0A0C”. What is the checksum value calculated at destination? E419 B1E6 E6B1 4E19
1 vote
7
In IPV6 what are the Headers i need to learn. And do i have to remember the fields present in Unicast, Multicast, Geography unicast addess?
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Hi Guys, Could you please provide justification for the mentioned options ?
9
Consider an initially empty hash table of length 10. Following set of keys are inserted using open addressing with hash function h(k) = kmod 10 and linear probing. The number of different insertion sequence of the key values using the given hash function and linear probing will result ... to send the packet from source to destination with minimum number of hops. D) both b and c. I think it is B).
1 vote
10
we know that broadcasting is not possible in IPV6 then how flooding will be possible??
11
Consider the following statements with respect to IPv6 : S1 : IPv6 packet has field for the header checksum. S2 : It has an explicit extension header for fragmentation. S3 : It has encrypted security payload (ESP) extension header that ensures the integrity of ... .? I know that integrity is provided by auth. extension header and confidentiality by ESP.But can ESP provides message integrity also?
12
Plz explain the statements are True or False (1) IPV4 connectionless protocol (2) IPV6 connectionless protocol (3) IPV4 cannot guarantee delivery of packet and also not guarantee duplicate packets are avoided at receiver side (4) IPV6 cannot guarantee delivery of packet and also not guarantee duplicate packets are avoided at receiver side
13
Which of the following statements are true? The fragmentation fields in the base header section of $IPv4$ have moved to the fragmentation extension header in $IPv6$. The authentication extension header is new in $IPv6$. The record route option is not implemented in $IPv6$. (a) and (b) Only (b) and (c) Only (a) and (c) Only (a), (b) and (c)
14
No. of bits to represent (traffic class, flow label) in IPv6 header ?? in fourozan it is given as (4, 24) whereas in peterson and tennenbaum it is given as (8, 20)
1 vote
15
What is the size of flow label in IPV6 header? In forouzan it is 24 bits but in tanenbaum it is 20 bits.Please some confirm?
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True or false - 1. In Ipv4 fragmentation can be done both at Source and intermediate routers. 2. In Ipv6 fragmentation can be done only at Source and not intermediate routers. 3. In both IPv6/4 reassembly is done only at the destination. 4. Ipv6 is connection ... - Is fragmentation done at the Source in Ipv4? Should the 1) be false since segmentation is done and hence fragmentation can be avoided?
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