IPv6 Features and Addressing Quiz

The prefix-length metric in IPv6 addressing indicates the number of bits that constitute the network address, allowing for hierarchical addressing and network partitioning.

Unicast addresses deliver packets to one interface, multicast addresses deliver packets to multiple interfaces, and anycast addresses deliver packets to the nearest of multiple interfaces in terms of routing distance.

IPv6 allows for specialized prefixes by specifying routing prefixes that can be used globally or limited to smaller network segments, providing flexibility in network partitioning.

<p>The IPv6 prefix allocation by RIR allows for efficient distribution of address space, enabling organizations to obtain the appropriate amount of address space for their network requirements.</p> Signup and view all the answers

<p>The IPv6 unspecified address (0:0:0:0:0:0:0:0) is used to indicate the absence of an address, while the loopback address (0:0:0:0:0:0:0:1) allows a node to send a packet to itself, similar to the loopback address in IPv4 (127.0.0.1).</p> Signup and view all the answers

<p>Hierarchical addressing in IPv6 allows for efficient routing and management by enabling the division of the address space into smaller network segments with varying lengths of prefixes, facilitating scalability and network organization.</p> Signup and view all the answers

<p>The problems with IPv4 include the exhaustion of public address space, large routing tables for Internet backbone routers, complex configuration, and the lack of required IP-layer security.</p> Signup and view all the answers

<p>The public address space in IPv4 is exhausted, leading to the need for IPv6.</p> Signup and view all the answers

<p>The prediction of 45 billion additional devices by 2023 increases the demand for IP addresses, which is not sustainable with the limited IPv4 address space.</p> Signup and view all the answers

<p>Classless addressing is considered an improvement over classful addressing in IPv4 because it allows for more efficient address allocation and reclamation, addressing the inefficiencies of early address allocation.</p> Signup and view all the answers

<p>CIDR converted the classful address space into a classless space, providing a solution to the inefficient early address allocation and reclaiming addresses that were no longer in use.</p> Signup and view all the answers

<p>The growth of cloud services and the Internet of Things significantly increases the demand for IP addresses, as more devices and services require connectivity, surpassing the limitations of the IPv4 address space.</p> Signup and view all the answers

<p>Unicast address in IPv6 allows a single interface to have multiple addresses and refers to a packet destined for only one other interface. Multicast in IPv6 allows logical grouping of nodes for receiving the same messages or providing content to multiple nodes simultaneously. Anycast addresses in IPv6 allow a node to communicate with one of a set of routers or service providing hosts without adding excess traffic to the network.</p> Signup and view all the answers

<p>IPv6 scopes range from link-local (limited to a collision domain) to global (comprising all interfaces with an Internet connection).</p> Signup and view all the answers

<p>The prefix is the network portion of an IPv6 address, representing the upper half (64 bits) of the address.</p> Signup and view all the answers

<p>The prefix length is the number of most-significant bits defining the prefix, equivalent to the subnet mask in IPv4.</p> Signup and view all the answers

<p>Link-local unicast addresses are local only on a specific link or subnet and are not routable beyond the local subnet. They are typically generated automatically by the host operating system and commonly begin with fe80.</p> Signup and view all the answers

<p>The unspecified address in IPv6 is an all-0s address used only as a source address and never forwarded by an IPv6 router.</p> Signup and view all the answers

<p>Stateful configuration in DHCPv6 keeps track of IP address and host associations, while stateless configuration provides additional information like DNS and default gateway without assigning IPv6 addresses.</p> Signup and view all the answers

<p>SLAAC allows devices to automatically configure IPv6 addresses by giving itself a link-local address, checking for address duplication, sending a Router Solicitation message, receiving a Router Advertisement, and configuring a Global Unicast Address (GUA).</p> Signup and view all the answers

<p>The link-local address is generated by combining the local prefix (FE80::/64) and the EUI-64 interface identifier obtained from the MAC address.</p> Signup and view all the answers

<p>DAD involves the device sending three ICMPv6 messages using a solicited node multicast to ensure address uniqueness. It uses the Network Discovery protocol (NDP) and each interface joins a solicited node multicast group.</p> Signup and view all the answers

<p>After configuring the link-local address and ensuring its uniqueness, the device sends a Router Solicitation message to obtain the global unicast prefix from routers on the segment.</p> Signup and view all the answers

<p>Some key differences include the ability to have multiple addresses per interface, increased IP address size from 32 to 128 bits, and a hierarchical addressing scheme without the need for NAT.</p> Signup and view all the answers

<p>Transitioning to IPv6 can lead to increased performance, with content providers like Facebook and Spectrum seeing significant improvements in performance.</p> Signup and view all the answers

<p>Important new features of IPv6 include the Subnet ID field in the address, modifications to the IPv6 header, and the new ICMPv6 Neighbor Discovery Protocol (NDP).</p> Signup and view all the answers

<p>By expanding the address space to 128 bits, IPv6 solves the IPv4 address shortage, simplifies routing and renumbering, and renders NAT expendable.</p> Signup and view all the answers

<p>IPv6 addresses can be represented in a compact notation using '::' to indicate consecutive blocks of 16 bits with all 0s.</p> Signup and view all the answers

<p>IPv6 addresses are 128 bits in length, written as a string of hexadecimal digits, and can be categorized as unicast, multicast, or anycast.</p> Signup and view all the answers

<p>A global unicast address (GUA) in IPv6 is globally unique, routable, and equivalent to a public IPv4 address, starting with a hexadecimal 2 or 3.</p> Signup and view all the answers