IPv6 Addressing and Format

65536 subnets.

264 active hosts.

Unicast addresses target a single interface, while anycast addresses are assigned to a group of interfaces and deliver packets to one, typically the nearest, interface.

<p>A multicast address delivers packets to all interfaces that have joined the corresponding multicast group.</p> Signup and view all the answers

<p>A 64-bit network prefix and a 64-bit interface identifier.</p> Signup and view all the answers

<p>Broadcast functionality is replaced by multicast addressing for efficient packet distribution.</p> Signup and view all the answers

<p>Anycast addresses have the same format as unicast addresses, making them difficult to distinguish.</p> Signup and view all the answers

<p>The EUI-64 format integrates a 48-bit MAC address to create a unique 64-bit interface identifier.</p> Signup and view all the answers

<p>Remove leading zeroes and use '::' to replace contiguous sections of zeroes.</p> Signup and view all the answers

<p>It is represented by writing the final 32 bits in IPv4 dotted-quad notation, prefixed by '::'.</p> Signup and view all the answers

<p>A /32 allocation is common for organizations based on need.</p> Signup and view all the answers

<p>Unicast is a one-to-one communication method where a single sender sends data to a single receiver.</p> Signup and view all the answers

<p>Anycast addresses allow data to be delivered to the nearest of multiple potential receivers.</p> Signup and view all the answers

<p>The most common subnet size in IPv6 is /64.</p> Signup and view all the answers

<p>EUI-64 format enables automatic generation of a unique IPv6 address based on a device's MAC address.</p> Signup and view all the answers

<p>IANA allocates IPv6 address space in blocks of /12 bits.</p> Signup and view all the answers

<p>CIDR notation indicates the routing prefix of an address, such as '2001:db8:a::123/64', which specifies the subnet size.</p> Signup and view all the answers

<p>The Internet Assigned Numbers Authority (IANA) manages IPv6 address allocations.</p> Signup and view all the answers

<p>IPv6 has a vastly larger address space than IPv4, with $2^{128}$ addresses compared to $2^{32}$ in IPv4.</p> Signup and view all the answers

<p>Provider-independent address space is assigned directly to end-users from the range '2001:678::/29' to allow for provider changes without renumbering.</p> Signup and view all the answers

<p>IPv6 addresses are allocated in structured blocks to facilitate efficient route aggregation and management of address distribution.</p> Signup and view all the answers

<p>The EUI-64 format is used to generate a unique 64-bit interface identifier from a device's MAC address for IPv6 addresses.</p> Signup and view all the answers

<p>Unicast addresses identify a single unique interface, anycast addresses direct packets to any one of a group of interfaces, and multicast addresses target multiple interfaces.</p> Signup and view all the answers

<p>The '2001:7f8::/29' range is allocated for Internet Exchange Points (IXPs) to facilitate communication with connected ISPs.</p> Signup and view all the answers

<p>A unique identity ensures that each interface can be individually addressed and communicated with on the subnet, preventing data collisions.</p> Signup and view all the answers

<p>The hierarchical nature of IPv6 addresses, using a 64-bit network prefix, supports a logical division of addresses, allowing for 65536 subnets with 16 bits for subnetting.</p> Signup and view all the answers

<p>Multicasting targets specific groups of hosts rather than all devices, minimizing unnecessary traffic and enabling more efficient use of network resources.</p> Signup and view all the answers

<p>Anycast addresses allow packets to be delivered to the nearest host in a group, reducing latency and improving response times.</p> Signup and view all the answers

<p>While theoretically possible, this number exceeds practical limits like network management, making it impractical to support such a vast number of active hosts in reality.</p> Signup and view all the answers

<p>Unique identities for interfaces ensure that data packets reach their intended destination without ambiguity or errors.</p> Signup and view all the answers

<p>Multicast addresses can send packets to multiple hosts simultaneously, while unicast addresses are directed to a single interface.</p> Signup and view all the answers

<p>Routing protocols determine the shortest path to anycast addresses, ensuring packets are sent to the closest member interface in the group based on defined metrics.</p> Signup and view all the answers

<p>The /64 subnet size is significant in IPv6 as it is the most common size used for subnets, providing a vast address space for devices within that subnet.</p> Signup and view all the answers

<p>Regional registries use CIDR notation to allocate IPv6 address space to ISPs, typically assigning blocks of /32 bits, which can be further subdivided.</p> Signup and view all the answers

<p>ISPs allocate a broader range of IPv6 addresses (often /32) to individual customers, known as end-site allocations, which usually consist of /48 addresses.</p> Signup and view all the answers

<p>CIDR notation allows for the specification of routing prefixes directly with the IP address, simplifying the representation and management of subnets.</p> Signup and view all the answers

<p>IPv6 addresses are typically distributed to end users in blocks sized from /48 to /56.</p> Signup and view all the answers

<p>The allocation is organized in blocks to maintain efficient address management and distribution across different hierarchies of networks.</p> Signup and view all the answers

<p>/64 subnet size is significant because it allows for efficient hierarchal addressing and ensures compatibility with Stateless Address Autoconfiguration (SLAAC).</p> Signup and view all the answers

<p>Provider-independent address space allows organizations to maintain their IP addresses regardless of their ISP, enabling easier management and continuity.</p> Signup and view all the answers

<p>IANA allocates IPv6 address space to RIRs in large blocks ranging from /23 to /12.</p> Signup and view all the answers

<p>IANA's role involves managing the global allocation of IPv6 address space and assigning blocks to regional registries, ensuring an organized distribution.</p> Signup and view all the answers

<p>IPv6's vast address space reduces the need for NAT since addresses are almost always available for end users.</p> Signup and view all the answers

<p>Regional registries assess the allocation needs of ISPs and end-users to determine the appropriate size and allocation of IPv6 blocks for efficient distribution.</p> Signup and view all the answers

<p>The typical /32 allocation size provides ISPs with a large enough address block to efficiently manage multiple customers, typically offering /48s to each.</p> Signup and view all the answers

<p>RIRs can divide each /32 block into 65536 /48 blocks, typically assigning one to each customer or ISP.</p> Signup and view all the answers

<p>The larger address space in IPv6 enables efficient route aggregation, which helps reduce the size of Internet routing tables.</p> Signup and view all the answers

<p>IXPs are assigned special IPv6 addresses from the range 2001:7f8::/29 to facilitate communication with connected ISPs.</p> Signup and view all the answers