Networking Chapter 5: Subnetting and Segmentation

A smaller network that is part of a larger network

A group of devices that can communicate with each other by sending broadcast packets

Dividing a network into smaller, isolated subnetworks

A system for assigning unique numerical addresses to devices on a network

The process of dividing a larger network into smaller subnetworks

A part of an IP address that distinguishes between the network and host portion.

The best place to subdivide a network for ease of management.

Subnetting that is not limited by predefined network classes (like Classful subnetting).

The place value of the last bit set to '1' in the subnet mask's binary representation.

A subnet mask that divides a network into two equal-sized subnets using a subnet mask with a binary representation of 11111111.11111111.11111111.10000000.

Dividing a network into smaller subnetworks to increase network efficiency and manageability

Formula used to determine the possible number of subnets which is determined by the number of bits borrowed from the host portion. Example: 2^x = Number of Subnets.

Formula for determining the number of usable host addresses in a subnet. Example: 2^y - 2 = Number of Hosts, where y = number of bits left in host portion of the IPv4 address.

A /26 subnet mask uses 2 bits for subnetting, allowing you to create 2^2 = 4 subnets.

The Magic Number for a /26 subnet is 64. This number represents the size of each subnet in terms of host addresses.

To calculate the starting address of a /27 subnet, you start with the base network address and add the Magic Number (32) for each subsequent subnet. The first subnet starts at 0, so the second subnet starts at 32.

Each /27 subnet has 2^5 = 32 host addresses available. This range excludes the network and broadcast addresses.

To create 100 subnets using a /16 prefix, you need to borrow 7 bits for subnetting. This is because 2^7 = 128, which is greater than the desired 100 subnets

A group of devices on a network that can communicate with each other using broadcast messages.

Large broadcast domains can lead to network congestion and slow performance due to excessive broadcasts sent by devices.

Subnetting divides a large network into smaller, more manageable subnetworks, reducing broadcast traffic and improving performance.

Subnetting is a technique used to divide a network into smaller, independent subnetworks, enhancing network efficiency, security, and manageability.

ARP (Address Resolution Protocol) and DHCP (Dynamic Host Configuration Protocol) use broadcasts to discover devices and services on a network.

It improves network performance by reducing overall traffic and allows for more granular security policies.

Subnetting divides a network into smaller, isolated subnetworks, creating broadcast domains and limiting communication between them.

The most efficient locations to subdivide a network, typically at /8, /16, and /24 prefix lengths, for easier management.

Taking bits from the host portion of an IP address to create more network bits, allowing for more subnets.

They both indicate the network portion of an IP address. Subnet mask uses a dotted decimal notation, while prefix length uses a slash notation.

A /25 subnet divides a network into two equal-sized subnets using a subnet mask with a binary representation of 11111111.11111111.11111111.10000000.

The formula 2^x = Number of Subnets is used to determine the possible number of subnets based on the number of bits borrowed from the host portion.

The formula 2^y - 2 = Number of Hosts, where y represents the number of remaining bits in the host portion, is used to determine the number of usable host addresses in a subnet.

A subnet mask for a /26 network is 11111111.11111111.11111111.11000000 in binary, which means it's 255.255.255.192 in decimal notation.

In subnetting, the Magic Number represents the size of each subnet in terms of host addresses. It's calculated as 2^(number of bits borrowed).

A /27 subnet uses 3 bits for subnetting, resulting in 2^3 = 8 subnets. Each subnet has a size of 2^5 = 32 host addresses.

To create 100 subnets from a /16 network, you need to borrow 7 bits for subnetting (2^7 = 128). This results in 128 possible subnets, which is greater than 100.