Briefly explain the three types of IPv6 addresses. Solution Three types of IPv6 (Internet Protocol version 6 )addresses. An IPv6 label is used to identify a network interface of a computer or other network node participating in an IPv6 computer network. IPv6 is the successor to the first addressing infrastructure of the internet , IPv4(internet protocol version 4). IPv4 IP address has 32-bit value where as IPv6 addresses have a size of 128-bit vale. That is why IPv6 has enlarged address space compared to IPv4.An IP address serves the purpose of uniquely identifying an individual n/w interface of a host, which is locating on the network, and it permits the routing of IP packets between hosts. IP addresses are present in the field of packet header. For routing IP addresses indicates source and destination of the packet. The following are the three types of IP addresses which are supported by IPv6 IPv6 addresses are classified by the primary addressing and routing methodologies common in networking. They are ……… This is an identifier for a single interface. A Packet sent to a unicast address is delivered to the interface identified by that address. It can be link-local scope, site-local scope,or global scope. Ths is an identifier for a group of interfaces generally belonging to different nodes. A packet sent to multicast address is delivered to all interfaces identified by that address. An identifier for a group of interfaces generally belonging to different nodes. A packet sent to an anycast address is delivered to the closest member of a group or nearest member of a group, according to the routing protocols measure of distance. Anycast addresses are taken from the unicast address spaces and are not syntactically distinguishable from unicast addresses. Anycast is described as a cross between unicast and multicast. Like multicast, multiple nodes may be listening on an anycast address. Like unicast, a packet sent to an anycast address will be delivered to only one of those nodes. The exact node to which is delivered is based on the IP routing table in the n/w. Unicast and anycast addresses are composed of two logical parts. A 64-bit n/w prefix used for routing and a 64-bit interface identifier used to identify host’s n/w interface. The n/w prefix is the combination of routing prefix combined with subnet id. It contained in the most significant 64 bits of the address. The size of the routing prefix may vary. A larger prefix size means a smaller subnet id size. The 64-bit interface identifier is either automatically generated of assigned manually. Multcast addresses are formed according to several specific formatting rules, depending on the application. .

1. Briefly explain the three types of IPv6 addresses.
Solution
Three types of IPv6 (Internet Protocol version 6 )addresses.
An IPv6 label is used to identify a network interface of a computer or other network node
participating in an IPv6 computer network. IPv6 is the successor to the first addressing
infrastructure of the internet , IPv4(internet protocol version 4). IPv4 IP address has 32-bit value
where as IPv6 addresses have a size of 128-bit vale. That is why IPv6 has enlarged address space
compared to IPv4.An IP address serves the purpose of uniquely identifying an individual n/w
interface of a host, which is locating on the network, and it permits the routing of IP packets
between hosts. IP addresses are present in the field of packet header. For routing IP addresses
indicates source and destination of the packet.
The following are the three types of IP addresses which are supported by IPv6
IPv6 addresses are classified by the primary addressing and routing methodologies common in
networking. They are ………
This is an identifier for a single interface. A Packet sent to a unicast address is delivered to the
interface identified by that address. It can be link-local scope, site-local scope,or global scope.
Ths is an identifier for a group of interfaces generally belonging to different nodes. A packet sent
to multicast address is delivered to all interfaces identified by that address.
An identifier for a group of interfaces generally belonging to different nodes. A packet sent to an
anycast address is delivered to the closest member of a group or nearest member of a group,
according to the routing protocols measure of distance.
Anycast addresses are taken from the unicast address spaces and are not syntactically
distinguishable from unicast addresses. Anycast is described as a cross between unicast and
multicast. Like multicast, multiple nodes may be listening on an anycast address. Like unicast, a
packet sent to an anycast address will be delivered to only one of those nodes. The exact node to
which is delivered is based on the IP routing table in the n/w.

2. Unicast and anycast addresses are composed of two logical parts.
A 64-bit n/w prefix used for routing and a 64-bit interface identifier used to identify host’s
n/w interface. The n/w prefix is the combination of routing prefix combined with subnet id. It
contained in the most significant 64 bits of the address. The size of the routing prefix may vary.
A larger prefix size means a smaller subnet id size. The 64-bit interface identifier is either
automatically generated of assigned manually.
Multcast addresses are formed according to several specific formatting rules, depending on the
application.