IPv4 Addressing Structure Quiz

IPv4 Addressing

• Most organizations use Private IP addresses to assign addresses to internal hosts.
• Link-local addresses are more commonly known as APIPA (Automatic Private IP Addressing) addresses.

History of IPv4

• IPv4 addresses were assigned using classful addressing until 1993.

Subnetting

• The purpose of subnetting is to divide a large network into smaller sub-networks to improve network organization and reduce broadcast traffic.
• Networks are most easily subnetted at octet boundaries (8, 16, 24, etc.).
• Subnetting involves borrowing host bits to create additional network bits, known as subnetting.
• The purpose of Variable Subnet Length Masking (VLSM) is to allow for more efficient use of available addresses by assigning different subnet masks to different subnets.

VLSM Considerations

• When using VLSM, the address space must be satisfied first.

Network Types

• A broadcast network generates excessive broadcasts and negatively affects the network.

IP Address Management

• The Internet Assigned Numbers Authority (IANA) manages both IPv4 and IPv6 addresses and allocates blocks of IP addresses to the Regional Internet Registries (RIRs).

Subnetting in IPv4

• Subnetting in IPv4 networks allows for the creation of multiple subnets with different subnet masks.

VLSM

• VLSM stands for Variable Subnet Length Masking in the context of IPv4 network subnets.

Address Conservation

• Address conservation is usually needed in the WAN (Wide Area Network) part of the network.

DHCP

• DHCP stands for Dynamic Host Configuration Protocol in the context of IP addressing.

Device Addressing

• All devices within a network require addresses, including end-user devices, servers, and intermediary devices.

IP Address Allocation

• Having a set pattern for allocating IP addresses to different types of devices helps with network organization and management.
• When planning IPv4 network subnets, there is usually more flexibility in address allocation at the access layer.

Network Planning

• When planning an IPv4 network, it is necessary to determine how many subnets are needed and how many hosts per subnet.

Intermediary Devices

• Intermediary devices, such as routers and switches, are considered intermediary devices within a network.

Network Segmentation

• DMZ stands for Demilitarized Zone in the context of network segmentation, which is used to separate public-facing servers from the rest of the network.

IPv4 Address Structure

• An IPv4 address consists of 32 bits, divided into four octets, and is represented in dotted decimal notation (xxx.xxx.xxx.xxx).
• The prefix length of an IPv4 address represents the number of bits used for the network portion of the address.
• The written notation for the prefix length of an IPv4 address is in CIDR (Classless Inter-Domain Routing) notation (e.g., /24).

Logical Operations

• The result of a logical AND operation between two bits is 1 if both bits are 1, and 0 otherwise.

Transmission Types

• Unicast transmission in IPv4 is used to send packets to a single destination device.
• Broadcast transmission in IPv4 is used to send packets to all devices on a network.
• Multicast transmission in IPv4 is used to send packets to a group of devices on a network.