IPv4 Address Classes and Subnetting Quiz

False (B)

0 to 127

<p>192, 223</p> Signup and view all the answers

<p>Class A = Unicast services Class B = Unicast services Class C = Unicast services Class D = Multicast services Class E = Testing and future use</p> Signup and view all the answers

<p>252.5.15.111 (A)</p> Signup and view all the answers

<p>It cannot be all zeros or all ones.</p> Signup and view all the answers

<p>Network address (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>2,097,150</p> Signup and view all the answers

<p>32</p> Signup and view all the answers

<p>/8 = 24 /16 = 16 /24 = 8</p> Signup and view all the answers

<p>AND (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>19.30.64.0</p> Signup and view all the answers

<p>Host</p> Signup and view all the answers

<p>To determine the priority of the datagram in congestion scenarios (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Length of data</p> Signup and view all the answers

<p>header</p> Signup and view all the answers

<p>Identification Field = 16-bit field that identifies a datagram Flags Field = 3-bit field that indicates fragmentation control Total Length Field = Defines the total length of the datagram in bytes Type of Service (TOS) = 4-bit subfield for defining priority in congestion</p> Signup and view all the answers

<p>To segment a network into smaller subnetworks (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>2^n - 2</p> Signup and view all the answers

<p>255.255.255.128</p> Signup and view all the answers

<p>Subnet 0 = 192.168.1.0-127 Subnet 1 = 192.168.1.128-255</p> Signup and view all the answers

<p>It must have an IP address from the network it connects to. (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>2</p> Signup and view all the answers

<p>gateway</p> Signup and view all the answers

<p>Increase broadcast traffic across the network (C)</p> Signup and view all the answers

<p>4 subnets (A)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>255.255.255.224</p> Signup and view all the answers

<p>addressing</p> Signup and view all the answers

<p>2 bits = 4 subnets 3 bits = 8 subnets 4 bits = 16 subnets 1 bit = 2 subnets</p> Signup and view all the answers

<p>/27 (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>To allocate IP addresses to ISPs according to regional needs.</p> Signup and view all the answers

<p>IANA</p> Signup and view all the answers

<p>Allocating IP addresses to end users (A)</p> Signup and view all the answers

IPv4 addresses are categorised into five classes: A, B, C, D, and E.

Addresses in class A, B, and C are used for individual devices on a network.

Class D addresses are used for group communication, where a single address can reach multiple devices at once.

Class E addresses are reserved for future use and experimentation.

The first byte of an IPv4 address determines its class. For example: 0-127 is Class A, 128-191 is Class B, 192-223 is Class C.

An IPv4 address is divided into two parts: a network portion and a host portion.

A host address cannot be all zeros or all ones. These are reserved for special purposes.

A Class C address uses the 1st 24 bits for the network address and the last 8 bits for the host address.

Class C addresses have 21 bits dedicated for the network address, allowing for 2,097,150 unique networks.

A Class C address can hold a maximum of 254 unique host addresses per network.

A subnet mask separates the network and host portions of an IPv4 address.

We can find the network address by applying the subnet mask using the AND operation in binary.

The straight method uses binary notation for both the address and mask, then applies the AND operation.

The short-cut method quickly identifies the network address by copying or replacing bytes based on the subnet mask.

This method uses binary representation for both the address and mask, then applies the AND operation.

This method simplifies the process by applying rules based on subnet mask values.

In subnetting, you borrow bits from the host portion of an IP address to create more networks (subnets).

Borrowing 2 bits from the host portion allows you to create 4 subnets (2^2 = 4).

Borrowing 3 bits from the host portion creates 8 subnets (2^3 = 8).

The subnet mask 255.255.255.224 corresponds to a /27 notation. This means that the first 27 bits are used for the network portion, and the remaining 5 bits are used for the host portion.

The Internet Assigned Numbers Authority (IANA) is responsible for managing and assigning IP addresses globally.

Regional Internet Registries (RIRs) are responsible for allocating IP addresses within their respective regions.

ISPs (Internet Service Providers) obtain IP addresses from RIRs and then assign them to their customers.

A hierarchical system means that IP addresses are assigned based on a structured organizational approach, with different levels of authority managing different parts of the address space.

Subnets help control traffic by containing broadcast messages within their individual network segments, reducing overall network traffic and improving performance.

Subnetting involves borrowing bits from the host portion of an IP address to create subnet masks. These masks specify which bits represent the network and which represent the host.

The formula 2^n - 2 is used to calculate the number of usable hosts in a subnet. 'n' represents the number of remaining host bits after borrowing for subnetting.

The subnet mask defines the boundaries of a subnet. Devices on the same subnet share the same network portion of their IP addresses, determined by the subnet mask.

When creating two subnets from a network, 1 bit is borrowed from the host portion of the IP address. This results in a subnet mask of 255.255.255.128, dividing the network into two equal subnets.

Subnet 0 encompasses the first half of the network, with IP addresses ranging from 192.168.1.0 to 192.168.1.127. Subnet 1 covers the second half, with IP addresses from 192.168.1.128 to 192.168.1.255.

The network address (e.g., 192.168.1.0) represents the subnet itself and cannot be assigned to a host. The broadcast address (e.g., 192.168.1.255) is used for communication with all devices on the subnet.

Subnetting allows network administrators to control traffic, improve performance, and allocate IP addresses more efficiently. By dividing a network into smaller subnets, resources can be managed more effectively.

Subnetting is a fundamental concept in network design. Understanding subnetting enables you to plan and design networks for optimal efficiency and security.

A 4-bit subfield in the IPv4 header that indicates the priority of a datagram; used for congestion control and packet discarding.

A 16-bit field in the IPv4 header that identifies the total length of the datagram, including both the header and the data. It determines the maximum size of the datagram.

A 16-bit field that identifies the originating host for each datagram. Used to uniquely label packets.

A 3-bit field used for fragmentation. The first bit is reserved. The second bit, 'Do Not Fragment', specifies if the datagram can be fragmented. The third bit, 'More Fragment', indicates if it is part of a fragmented datagram.

A 1-byte (8-bit) field in the IPv4 header that indicates the length of the header in 32-bit words.