Unit 4 - LO1 - P1

What is the purpose of DHCP in network addressing?

• To allocate IP addresses and supply configuration information

• To create a physical address for network devices

• To assign private IP addresses

• To test communication and transportation

Answer explanation

The purpose of DHCP (Dynamic Host Configuration Protocol) is to allocate IP addresses and supply configuration information to devices on a network, enabling them to communicate effectively.

Which addressing method uses a hard-coded MAC address?

• DHCP

• MAC

• APIPA

• Classless

Answer explanation

The MAC addressing method uses a hard-coded MAC address to uniquely identify devices on a network. Unlike DHCP or APIPA, which assign addresses dynamically, MAC addresses are fixed and assigned to network interfaces.

What does APIPA stand for?

• Automatic Private IP Addressing

• Assigned Public IP Addressing

• Automated Protocol IP Addressing

• Advanced Private IP Allocation

Answer explanation

APIPA stands for Automatic Private IP Addressing, which is a feature that allows a device to automatically assign itself an IP address in the absence of a DHCP server. This enables basic network connectivity.

What is the purpose of a loopback address?

• To allocate IP addresses

• To test communication and transportation

• To assign private IP addresses

• To identify network classes

Answer explanation

The loopback address is used to test communication within a device. It allows for the verification of network software and configurations without needing external network access, making 'to test communication and transportation' the correct choice.

Which class of IP addresses is used for large networks?

• Class A

• Class B

• Class C

• Class D

Answer explanation

Class A IP addresses are designed for large networks, allowing for a vast number of hosts. They use the first octet to represent the network, providing a range from 1.0.0.0 to 126.255.255.255, suitable for extensive organizations.

Which class of IP addresses is not available to hosts?

• Class A

• Class B

• Class D

• Class C

Answer explanation

Class D IP addresses are reserved for multicast groups and are not assigned to individual hosts. Therefore, they are not available for use by hosts, making Class D the correct answer.

What does TCP ports allow in an IP network?

• Allocation of IP addresses

• Identification of packet types

• Assignment of private IP addresses

• Testing of communication

Answer explanation

TCP ports are used to identify specific types of packets in an IP network, allowing different services to communicate over the same IP address. This makes 'Identification of packet types' the correct choice.

What is the range of IP addresses used by APIPA?

• 127.0.0.0 to 127.255.255.255

• 169.254.0.1 to 169.254.255.254

• 192.0.0.0 to 223.255.255.255

• 240.0.0.0 to 255.255.255.255

Answer explanation

APIPA (Automatic Private IP Addressing) uses the range 169.254.0.1 to 169.254.255.254 for self-assigned IP addresses when a DHCP server is not available. This makes the second option the correct answer.

What is the purpose of the first 8 bits in a Class A network address?

• To identify the host ID

• To identify the network ID

• To identify the subnet mask

• To identify the broadcast address

Answer explanation

In a Class A network address, the first 8 bits are used to identify the network ID. This allows for a large number of hosts within a single network, as the remaining bits are reserved for host identification.

How many devices can be supported per network in a Class C address?

• 128

• 256

• 512

• 1024

Answer explanation

A Class C address has 24 bits for the network and 8 bits for host addresses. This allows for 2^8 = 256 addresses, but 2 are reserved (network and broadcast), leaving 254 usable addresses. Thus, the correct answer is 256.