Google Certification -Unit 13 Exam) *Q&A* (100% Correct) 2025/2026 |Verified|
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Google Certification -Unit 13 Exam)
*Q&A* (100% Correct) 2025/2026
|Verified|
What is the primary purpose of DNS (Domain Name System) in networking?
DNS translates human-readable domain names into IP addresses, allowing users to access
websites by typing in domain names instead of numer...
Google Certification -Unit 13 Exam)
*Q&A* (100% Correct) 2025/2026
|Verified|
What is the primary purpose of DNS (Domain Name System) in networking?
DNS translates human-readable domain names into IP addresses, allowing users to access
websites by typing in domain names instead of numerical IP addresses.
Explain the concept of DHCP (Dynamic Host Configuration Protocol) and its role in networking.
DHCP automatically assigns IP addresses to devices on a network, ensuring they can communicate
with each other and access network resources without manual configuration.
What is the difference between a public and a private IP address?
A public IP address is assigned to devices directly accessible from the internet, while a private IP
address is used within a local network and is not routable on the internet.
What is the significance of subnetting in network management?
Subnetting divides a larger network into smaller subnets, improving network performance,
security, and efficient use of IP addresses.
Describe how the OSI model works and its layers.
The OSI model is a conceptual framework that standardizes the functions of a communication
system into seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
What does the term "firewall" refer to in network security?
A firewall is a security system that monitors and controls incoming and outgoing network traffic
based on predetermined security rules, often used to protect networks from unauthorized access.
How does a router differ from a switch in a network?
1
, A router connects multiple networks and directs traffic between them, while a switch operates
within a single network to forward data between devices.
What is NAT (Network Address Translation), and why is it used in networking?
NAT allows multiple devices on a private network to share a single public IP address, helping
conserve IP addresses and providing security by hiding internal IP addresses.
Explain the concept of a VPN (Virtual Private Network).
A VPN creates a secure, encrypted connection over the internet, allowing users to access private
networks remotely as if they were directly connected to the local network.
What are the potential risks associated with using open Wi-Fi networks?
Open Wi-Fi networks are insecure, and users can be vulnerable to data interception, man-in-the-
middle attacks, and unauthorized access to their devices and information.
What is a MAC address, and what role does it play in networking?
A MAC address is a unique identifier assigned to the network interface of a device, used for
communication within a local network and distinguishing devices.
How does encryption help secure data during transmission over the network?
Encryption converts data into an unreadable format using algorithms, ensuring that even if
intercepted, the data cannot be easily deciphered by unauthorized parties.
What are the differences between IPv4 and IPv6?
IPv4 uses 32-bit addresses and supports approximately 4.3 billion unique IP addresses, while IPv6
uses 128-bit addresses, providing an almost unlimited number of IP addresses.
What is the purpose of port forwarding in networking?
Port forwarding directs incoming network traffic on specific ports to the appropriate internal
device, enabling remote access to services like web servers or gaming applications.
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