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A link-local address in IPv6 is used in a single network segment, not routable outside of the local network and typically starts with 'fe80::'.

A multicast address in IPv6 allows for the delivery of packets to multiple destinations in a single send operation, identified by addresses starting with 'ff'.

Path MTU Discovery for IPv6 is used to determine the maximum transmission unit (MTU) size on the path between a source and destination, preventing fragmentation and ensuring efficient routing.

IPv4 uses 32-bit addresses and is limited to approximately 4.29 billion addresses, whereas IPv6 uses 128-bit addresses allowing for a vastly larger number of addresses.

Global Unicast Addresses (GUAs) in IPv6 are equivalent to public IPv4 addresses and are globally routable and unique across the internet.

Tunneling is a method used to transport an IPv6 packet over an IPv4 network, encapsulating the IPv6 packet within an IPv4 packet to navigate IPv4 infrastructure.

NDP is a protocol used by IPv6 devices to discover other devices on the network, their addresses, and other link-layer information, replacing the need for ARP in IPv4.

IPv6 is the most recent version of the Internet Protocol (IP) designed to address the exhaustion of IPv4 addresses. It uses 128-bit addresses allowing for a huge number of unique addresses.

EUI-64 is a method of creating an IPv6 Interface Identifier from a 48-bit MAC address by inserting 'ff:fe' in the middle and flipping the seventh bit.

Extension headers provide additional information to the basic IPv6 header and allow for functions such as fragmenting packets, routing (Routing Header), and securing payloads (Security Header).

Internet Control Message Protocol for IPv6 (ICMPv6) is the implementation of the ICMP protocol for IPv6, used for diagnostic functions like 'ping' and for error reporting.

ULA in IPv6 represents a block of addresses similar to IPv4 private addresses, intended for local communications within a site or organization and not meant to be routed on the global internet.

An Anycast address in IPv6 is assigned to multiple interfaces (typically belonging to different nodes), and data sent to an anycast address is delivered to the closest interface as determined by routing protocols.

Dual stack refers to a network configuration that allows the simultaneous use of IPv4 and IPv6, enabling a smooth transition between them.

IPv6 Privacy Extensions enhance user privacy by regularly generating random interface identifiers to mask a device's network activity, making it harder to track over time.

IPv6 addresses have different scopes, such as link-local, unique local, and global, dictating their reachability and how far they can be routed.

Zero compression in IPv6 addresses allows for the substitution of a contiguous block of zero values with a double colon (::), but this can only be used once in an address to maintain uniqueness.

IPv6 addresses are written as eight groups of four hexadecimal digits, separated by colons (:), for example, 2001:0db8:85a3:0000:0000:8a2e:0370:7334.

The IPv6 header is simpler than the IPv4 header and is composed of 40 bytes containing basic information including version, traffic class, flow label, payload length, next header, hop limit, and source & destination addresses.