IPv6 Addressing (obj 1.8)

Question 1

What is the address space limitation of IPv4?

Answer 1

Limited address space of only 32 bits of addressable space

Approximately 4.3 billion addresses available in IPv4

Question 2

What problem is caused by IPv4’s address exhaustion?

Answer 2

Address exhaustion due to waste and subnetting

This leads to challenges in allocating IP addresses effectively

Question 3

What is the address space of IPv6?

Answer 3

128-bit addresses

This allows for a significantly larger number of unique addresses

Question 4

How many addresses can IPv6 theoretically provide?

Answer 4

340 undecillion addresses

This resolves the address exhaustion problem found in IPv4

Question 5

List two features of IPv6.

Answer 5

• No broadcasts
• No packet fragmentation

These features enhance the efficiency of network communication

Question 6

What is the structure of the IPv6 header?

Answer 6

Simplified header with only 5 fields

This simplification aids in processing packets more efficiently

Question 7

What is the maximum number of hexadecimal digits in an IPv6 address?

Answer 7

No more than 32 hexadecimal digits

This includes both segments and shorthand notations

Question 8

Fill in the blank: IPv6 addresses are represented in _______.

Answer 8

Hexadecimal Notation

Segments are separated by colons

Question 9

How can four consecutive zeros be represented in an IPv6 address?

Answer 9

By one zero

This is part of the shorthand notation used in IPv6

Question 10

What is the purpose of the double colon (::) in IPv6 addresses?

Answer 10

To summarize multiple segments that have just zeros

It can only be used once within an address

Question 11

What notation is used for identifying IPv4 addresses?

Answer 11

Dotted decimal notation (0-255)

This differs from the hexadecimal notation used in IPv6

Question 12

What are the characteristics of unicast IPv6 addresses?

Answer 12

• Identifies a single interface
• Globally routed unicast addresses
• First segment in IPv6 address is between 2000-3999

Similar to unicast addresses in IPv4

Question 13

What do link local addresses in IPv6 begin with?

Answer 13

FE80 as first segment

These addresses are similar to private IPs in IPv4

Question 14

What identifies a multicast IPv6 address?

Answer 14

Starts with FF as the first two digits within the first segment

This address type identifies a group of interfaces

Question 15

What does Anycast in IPv6 identify?

Answer 15

A set of interfaces allocated from unicast space

This allows for more efficient routing of data

Question 16

What is Stateless Address Autoconfiguration (SLAAC)?

Answer 16

An Auto-configuration that eliminates the need to obtain addresses or other configuration information from a central server

Utilizes MAC addresses to create unique identifiers

Question 17

What does the Extended Unique Identifier (EUI) allow?

Answer 17

To assign itself a unique 64-bit IPv6 interface identifier (EUI-64)

This is part of the SLAAC process

Question 18

What is the purpose of the Neighbor Discovery Protocol (NDP)?

Answer 18

To determine Layer 2 addresses on the network

It simplifies network configuration and improves efficiency

Question 19

List two functions of the Neighbor Discovery Protocol (NDP).

Answer 19

• Router solicitation
• Neighbor advertisement

Other functions include router advertisement, neighbor solicitation, and redirection