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Simplified header format. IPv6 has a fixed length header, which does not include most of the options an IPv4 header can include. Even though the IPv6 header contains two 128 bit addresses (source and destination IP address) the whole header has a fixed length of 40 bytes only. This allows for faster processing.
Options are dealt with in extension headers, which are only inserted after the IPv6 header if needed. So for instance if a packet needs to be fragmented, the fragmentation header is inserted after the IPv6 header. The basic set of extension headers is defined in RFC 2460.
What else can I help you with?
What is the length in bits of a logical IP address IPv4 and IPv6?
32 bits (for IPv4), or 128 bits (for IPv6).32 bits (for IPv4), or 128 bits (for IPv6).32 bits (for IPv4), or 128 bits (for IPv6).32 bits (for IPv4), or 128 bits (for IPv6).
The Traffic Class field in an IPv6 datagram serves the same funcition as which of the following fields in an IPv4 datagram?
DiffServ
Which IPv4 to IPv6 transition methods allows an IPv4 only host to communicate with a IPv6 only host?
I guess NAT64
What are the loopback addresses in IPv4 and IPv6?
In IPv4, the loopback address is 127.0.0.1. In IPv6 it is ::1.
Conversion of IPV4-IPV6?
There is no direct conversion.
How much overhead would this be if IPv6 is tunnelled over IPv4?
When tunneling IPv6 over IPv4, the overhead primarily consists of the additional IPv4 header and any encapsulation overhead. An IPv4 header is typically 20 bytes, while an IPv6 header is 40 bytes. Thus, the total overhead for tunneling one IPv6 packet over IPv4 would be 20 bytes, resulting in a total packet size increase of 20 bytes for every IPv6 packet transmitted. This additional overhead may impact performance, especially in networks with high traffic or limited bandwidth.
What is the length in bits of a logical IP address IPv4 and IPv6?
32 bits (for IPv4), or 128 bits (for IPv6).32 bits (for IPv4), or 128 bits (for IPv6).32 bits (for IPv4), or 128 bits (for IPv6).32 bits (for IPv4), or 128 bits (for IPv6).
Why does IPv6 use separate extension headers instead of fields in a single fixed header?
IPv6 includes an improved option mechanism over IPv4. IPv6 options are placed in separate extension headers that are located between the IPv6 header and the transport-layer header in a packet. Most IPv6 extension headers are not examined or processed by any router along a packet's delivery path until it arrives at its final destination. This facilitates a major improvement in router performance for packets containing options
The Protocol field used in IPV4 header is not present in the fixed IPV6 header Why not?
The Protocol field in the IPv4 header, which specifies the transport layer protocol used (like TCP or UDP), is not present in the fixed IPv6 header because IPv6 uses a more flexible approach with extension headers. Instead of a single Protocol field, IPv6 allows for multiple extension headers to be used, which can carry information about the transport protocol and other features. This design improves efficiency and scalability, enabling better handling of various protocols and options without cluttering the main header.
Should ipv4 be disabled when using ipv6?
There is no need to disable ipv4 to use ipv6.
How can dns distinguish between ipv4 and ipv6 host in determining which resource record to return?
It reads the protocol/bit stream/header
Differential between ipv4 and ipv6?
1. Describe the main features that differentiate IPv6 from IPv4
The Traffic Class field in an IPv6 datagram serves the same funcition as which of the following fields in an IPv4 datagram?
DiffServ
Which IPv4 to IPv6 transition methods allows an IPv4 only host to communicate with a IPv6 only host?
I guess NAT64
What purpose does NAT64 serve in IPv6?
NAT64 serves as a mechanism to facilitate communication between IPv6-only and IPv4-only networks by allowing IPv6 clients to access IPv4 services. It translates IPv6 packets to IPv4 packets and vice versa, enabling seamless connectivity without requiring the IPv4 service to be directly accessible via IPv6. This is particularly useful during the transition period from IPv4 to IPv6, ensuring compatibility and interoperability across different network environments.
What are the loopback addresses in IPv4 and IPv6?
In IPv4, the loopback address is 127.0.0.1. In IPv6 it is ::1.
Which characteristic describes an IPv6 enhancement over IPv4?
While IPv6 is based on IPv4, it is superior. The main characteristic that shows its enhancement over IPv4 is that it processes faster.
