AZ-700 Networking Fundamentals 1 — Questions and Answers

Question 1: What is the primary purpose of a subnet in a network?

To assign a unique IP address to each device
To separate a network into smaller, manageable segments (Correct answer)
To secure a network from external attacks
To assign domain names to IP addresses

Correct answer: To separate a network into smaller, manageable segments

The primary purpose of a subnet is to divide a larger network into smaller, more manageable segments. This segmentation improves network performance by reducing broadcast traffic, enhances security by isolating traffic, and simplifies network administration. Each subnet can then be assigned its own unique range of IP addresses.

Question 2: Which layer of the OSI model is responsible for establishing end-to-end communication and data flow control between hosts?

Physical Layer
Network Layer
Transport Layer (Correct answer)
Application Layer

Correct answer: Transport Layer

The Transport Layer (Layer 4) of the OSI model is responsible for end-to-end communication between applications on different hosts. It handles segmenting data, establishing connections, ensuring reliable data transfer through flow control and error checking, and reassembling segments at the destination. Protocols like TCP and UDP operate at this layer.

Question 3: Which of the following is NOT a private IP address range?

192.168.0.0/16
172.16.0.0/12
10.0.0.0/8
8.8.8.0/24 (Correct answer)

Correct answer: 8.8.8.0/24

Private IP address ranges are reserved for use within private networks and are not routable on the public internet. The ranges are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. The address 8.8.8.0/24 falls outside these reserved ranges and is a publicly routable IP address range, famously used by Google's public DNS servers.

Question 4: Which network protocol is responsible for converting human-readable domain names to IP addresses?

DHCP
DNS (Correct answer)
FTP
HTTP

Correct answer: DNS

DNS (Domain Name System) is the network protocol responsible for translating human-readable domain names, like www.example.com, into machine-readable IP addresses. This translation is crucial for devices to locate and communicate with servers on the internet. Without DNS, users would have to remember complex IP addresses to access websites.

Question 5: In a VPN connection, which protocol is commonly used to secure data during transmission?

SMTP
HTTP
IPsec (Correct answer)
DHCP

Correct answer: IPsec

IPsec (Internet Protocol Security) is a suite of protocols commonly used to secure data during transmission over a VPN connection. It provides authentication, integrity, and confidentiality services by encrypting and authenticating IP packets. This ensures that data remains private and unaltered as it travels across potentially insecure networks like the internet.

AZ-700 Networking Fundamentals 1

What is the primary purpose of a subnet in a network?