4.5.1 IPv4 vs IPv6

The initialism GB stands for what?

Answer: GB = GigaBytes

The initialism KB stands for what?

Answer: KB = KiloBytes

True/False: An IPv6 packet consists of two or three elements including the main header, one or more optional extension headers, and the payload.

Answer: True Explanation: An IPv6 packet consists of two or three elements: The main header, which is a fixed length (unlike in IPv4), One or more optional extension headers, And the payload. As with an IPv4 header, there are fields for the source and destination addresses and the version (0110 or 0x06 for IPv6). Some of the other header fields are as follows:

True/False: An IPv6 packet consists of two or three elements.

Answer: True Explanation: An IPv6 packet consists of two or three elements: The main header, which is a fixed length (unlike in IPv4), One or more optional extension headers, And the payload. As with an IPv4 header, there are fields for the source and destination addresses and the version (0110 or 0x06 for IPv6). Some of the other header fields are as follows:

True/False: As with an IPv4 header, there are fields for the source and destination addresses and the version (0110 or 0x06 for IPv6).

Answer: True Explanation: An IPv6 packet consists of two or three elements: The main header, which is a fixed length (unlike in IPv4), One or more optional extension headers, And the payload. As with an IPv4 header, there are fields for the source and destination addresses and the version (0110 or 0x06 for IPv6). Some of the other header fields are as follows:

True/False: In an IPv6 packet, the main header is a fixed length (unlike in IPv4).

Answer: True Explanation: An IPv6 packet consists of two or three elements: The main header, which is a fixed length (unlike in IPv4), One or more optional extension headers, And the payload. As with an IPv4 header, there are fields for the source and destination addresses and the version (0110 or 0x06 for IPv6). Some of the other header fields are as follows:

True/False: The extension headers in IPv6 replace the Options field in IPv4.

Answer: True Explanation: Extension headers replace the Options field in IPv4. There are several predefined extension headers to cover functions such as fragmentation and reassembly, security (IPSec), source routing, and so on.

True/False: There are several predefined IPv6 extension headers to cover functions such as fragmentation and reassembly, security (IPSec), source routing, and so on.

Answer: True Explanation: Extension headers replace the Options field in IPv4. There are several predefined extension headers to cover functions such as fragmentation and reassembly, security (IPSec), source routing, and so on.

True/False: As well as coping with the growth in ordinary company networks and Internet access subscribers, IPv6 is designed to meet the demands of billions of personal and embedded devices with Internet connectivity.

Answer: True Explanation: IP version 6 (IPv6) is designed to mitigate address exhaustion. Its 128-bit addressing scheme has space for 340 undecillion unique addresses. Even though only a small part of the scheme can currently be allocated to hosts, there is still enough address space within that allocation for every person on the planet to own thousands of addresses. As well as coping with the growth in ordinary company networks and Internet access subscribers, IPv6 is designed to meet the demands of billions of personal and embedded devices with Internet connectivity.

True/False: Even though only a small part of the IPv6 scheme can currently be allocated to hosts, there is still enough address space within that allocation for every person on the planet to own thousands of addresses.

Answer: True Explanation: IP version 6 (IPv6) is designed to mitigate address exhaustion. Its 128-bit addressing scheme has space for 340 undecillion unique addresses. Even though only a small part of the scheme can currently be allocated to hosts, there is still enough address space within that allocation for every person on the planet to own thousands of addresses. As well as coping with the growth in ordinary company networks and Internet access subscribers, IPv6 is designed to meet the demands of billions of personal and embedded devices with Internet connectivity.

True/False: IP version 6 (IPv6) is designed to mitigate address exhaustion.

Answer: True Explanation: IP version 6 (IPv6) is designed to mitigate address exhaustion. Its 128-bit addressing scheme has space for 340 undecillion unique addresses. Even though only a small part of the scheme can currently be allocated to hosts, there is still enough address space within that allocation for every person on the planet to own thousands of addresses. As well as coping with the growth in ordinary company networks and Internet access subscribers, IPv6 is designed to meet the demands of billions of personal and embedded devices with Internet connectivity.

True/False: IPv6 128-bit addressing scheme has space for 340 undecillion unique addresses.

Answer: True Explanation: IP version 6 (IPv6) is designed to mitigate address exhaustion. Its 128-bit addressing scheme has space for 340 undecillion unique addresses. Even though only a small part of the scheme can currently be allocated to hosts, there is still enough address space within that allocation for every person on the planet to own thousands of addresses. As well as coping with the growth in ordinary company networks and Internet access subscribers, IPv6 is designed to meet the demands of billions of personal and embedded devices with Internet connectivity.

True/False: 32 bits in an IP address can express 232 unique addresses (in excess of four billion).

Answer: True Explanation: In IPv4, the addressing scheme is based on a 32-bit binary number. 32 bits can express 2^32 unique addresses (in excess of four billion). However, the way in which addresses have been allocated has been inefficient, leading to waste of available addresses. Inefficiencies in the addressing scheme and unceasing demand for more addresses mean that the available IPv4 public address supply is exhausted.

True/False: In IPv4, the addressing scheme is based on a 32-bit binary number.

Answer: True Explanation: In IPv4, the addressing scheme is based on a 32-bit binary number. 32 bits can express 2^32 unique addresses (in excess of four billion). However, the way in which addresses have been allocated has been inefficient, leading to waste of available addresses. Inefficiencies in the addressing scheme and unceasing demand for more addresses mean that the available IPv4 public address supply is exhausted.

True/False: Inefficiencies in the addressing scheme and unceasing demand for more addresses mean that the available IPv4 public address supply is exhausted.

Answer: True Explanation: In IPv4, the addressing scheme is based on a 32-bit binary number. 32 bits can express 2^32 unique addresses (in excess of four billion). However, the way in which addresses have been allocated has been inefficient, leading to waste of available addresses. Inefficiencies in the addressing scheme and unceasing demand for more addresses mean that the available IPv4 public address supply is exhausted.

True/False: The way in which addresses have been allocated has been inefficient, leading to waste of available addresses.

Answer: True Explanation: In IPv4, the addressing scheme is based on a 32-bit binary number. 32 bits can express 2^32 unique addresses (in excess of four billion). However, the way in which addresses have been allocated has been inefficient, leading to waste of available addresses. Inefficiencies in the addressing scheme and unceasing demand for more addresses mean that the available IPv4 public address supply is exhausted.

True/False: Flow Label is set to 0 for packets not part of any delivery sequence or structure.

Answer: True Explanation: Traffic Class: Describes the packet's priority. Flow Label: Used for quality of service (QoS) management, such as for real-time streams. This is set to 0 for packets not part of any delivery sequence or structure. Payload Length: Indicates the length of the packet payload, up to a maximum of 64 KB; if the payload is bigger than that, this field is 0, and a special Jumbo Payload (4 GB) option is established. Next Header: Used to describe what the next extension header (if any) is, or where the actual payload begins. Hop Limit: Replaces the TTL field in IPv4 but performs the same function.

True/False: Flow Label is used for quality of service (QoS) management, such as for real-time streams.

Answer: True Explanation: Traffic Class: Describes the packet's priority. Flow Label: Used for quality of service (QoS) management, such as for real-time streams. This is set to 0 for packets not part of any delivery sequence or structure. Payload Length: Indicates the length of the packet payload, up to a maximum of 64 KB; if the payload is bigger than that, this field is 0, and a special Jumbo Payload (4 GB) option is established. Next Header: Used to describe what the next extension header (if any) is, or where the actual payload begins. Hop Limit: Replaces the TTL field in IPv4 but performs the same function.

True/False: Hop Limit replaces the TTL field in IPv4 but performs the same function.

Answer: True Explanation: Traffic Class: Describes the packet's priority. Flow Label: Used for quality of service (QoS) management, such as for real-time streams. This is set to 0 for packets not part of any delivery sequence or structure. Payload Length: Indicates the length of the packet payload, up to a maximum of 64 KB; if the payload is bigger than that, this field is 0, and a special Jumbo Payload (4 GB) option is established. Next Header: Used to describe what the next extension header (if any) is, or where the actual payload begins. Hop Limit: Replaces the TTL field in IPv4 but performs the same function.

True/False: If a payload is bigger than 64 KB, the payload length field is 0, and a special Jumbo Payload (4 GB) option is established.

Answer: True Explanation: Traffic Class: Describes the packet's priority. Flow Label: Used for quality of service (QoS) management, such as for real-time streams. This is set to 0 for packets not part of any delivery sequence or structure. Payload Length: Indicates the length of the packet payload, up to a maximum of 64 KB; if the payload is bigger than that, this field is 0, and a special Jumbo Payload (4 GB) option is established. Next Header: Used to describe what the next extension header (if any) is, or where the actual payload begins. Hop Limit: Replaces the TTL field in IPv4 but performs the same function.

True/False: Next Header is used to describe what the next extension header (if any) is, or where the actual payload begins.

Answer: True Explanation: Traffic Class: Describes the packet's priority. Flow Label: Used for quality of service (QoS) management, such as for real-time streams. This is set to 0 for packets not part of any delivery sequence or structure. Payload Length: Indicates the length of the packet payload, up to a maximum of 64 KB; if the payload is bigger than that, this field is 0, and a special Jumbo Payload (4 GB) option is established. Next Header: Used to describe what the next extension header (if any) is, or where the actual payload begins. Hop Limit: Replaces the TTL field in IPv4 but performs the same function.

True/False: Payload Length indicates the length of the packet payload, up to a maximum of 64 KB.

Answer: True Explanation: Traffic Class: Describes the packet's priority. Flow Label: Used for quality of service (QoS) management, such as for real-time streams. This is set to 0 for packets not part of any delivery sequence or structure. Payload Length: Indicates the length of the packet payload, up to a maximum of 64 KB; if the payload is bigger than that, this field is 0, and a special Jumbo Payload (4 GB) option is established. Next Header: Used to describe what the next extension header (if any) is, or where the actual payload begins. Hop Limit: Replaces the TTL field in IPv4 but performs the same function.

True/False: Traffic Class describes the packet's priority.

Answer: True Explanation: Traffic Class: Describes the packet's priority. Flow Label: Used for quality of service (QoS) management, such as for real-time streams. This is set to 0 for packets not part of any delivery sequence or structure. Payload Length: Indicates the length of the packet payload, up to a maximum of 64 KB; if the payload is bigger than that, this field is 0, and a special Jumbo Payload (4 GB) option is established. Next Header: Used to describe what the next extension header (if any) is, or where the actual payload begins. Hop Limit: Replaces the TTL field in IPv4 but performs the same function.

An IPv6 packet consists of two or three elements: a. Main Header b. Extension Headers c. Payload. d. All of the Above e. None of the Above

Answer: d. All of the Above a. Main Header b. Extension Headers c. Payload. Explanation: An IPv6 packet consists of two or three elements: The main header, which is a fixed length (unlike in IPv4), One or more optional extension headers, And the payload. As with an IPv4 header, there are fields for the source and destination addresses and the version (0110 or 0x06 for IPv6). Some of the other header fields are as follows:

The initialism QoS stands for what?

QoS = Quality of Service