Google Certification -Unit 5 Exam-
Updated *Q&A* (100% Correct)
2025/2026 |Verified|
1. What is the purpose of DNS in networking?
DNS is used to translate domain names into IP addresses.
2. Describe the function of DHCP in a network.
DHCP automatically assigns IP addresses to device...
Google Certification -Unit 5 Exam-
Updated *Q&A* (100% Correct)
2025/2026 |Verified|
1. What is the purpose of DNS in networking?
DNS is used to translate domain names into IP addresses.
2. Describe the function of DHCP in a network.
DHCP automatically assigns IP addresses to devices on a network.
3. Explain the difference between a switch and a hub.
A switch is a network device that forwards data only to the device it is intended for, whereas a
hub broadcasts data to all connected devices.
4. What is an IP address, and why is it important?
An IP address is a unique identifier for a device on a network, allowing it to communicate with
other devices.
5. What does the TCP/IP protocol stack include?
The TCP/IP protocol stack includes four layers: Link, Internet, Transport, and Application.
6. What is the role of the Transport layer in the OSI model?
The Transport layer ensures reliable data transfer between devices on the network.
7. What is the purpose of NAT (Network Address Translation)?
NAT allows multiple devices on a local network to share a single public IP address.
8. Describe the function of the Application layer in the OSI model.
1
, The Application layer provides network services directly to end-user applications, like web
browsers and email clients.
9. What is a subnet mask, and how is it used?
A subnet mask defines the network portion and host portion of an IP address, used for routing
and subnetting.
10. What is the primary function of a router?
A router directs data packets between different networks based on IP addresses.
11. What does the acronym "LAN" stand for, and what does it mean?
LAN stands for Local Area Network, which is a network that connects devices within a limited area
like a home or office.
12. What is the function of a firewall in network security?
A firewall monitors and controls incoming and outgoing network traffic based on security rules.
13. How does SSL/TLS encryption work in securing web communications?
SSL/TLS encryption ensures that data transmitted over the web is securely encrypted to prevent
unauthorized access.
14. What is the role of DNS caching?
DNS caching stores previously queried domain names and their corresponding IP addresses for
faster lookup.
15. What does IPv6 offer over IPv4?
IPv6 provides a much larger address space compared to IPv4, allowing for more unique IP
addresses.
16. What is a VPN, and how does it enhance security?
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