Google Certification -Unit 7 Exam-
Updated *Q&A* (100% Correct)
2025/2026 |Verified|
1. What is the purpose of DNS in a network?
It translates human-readable domain names into IP addresses.
2. Explain the difference between an IPv4 and IPv6 address.
IPv4 uses 32-bit addresses, while...
Google Certification -Unit 7 Exam-
Updated *Q&A* (100% Correct)
2025/2026 |Verified|
1. What is the purpose of DNS in a network?
It translates human-readable domain names into IP addresses.
2. Explain the difference between an IPv4 and IPv6 address.
IPv4 uses 32-bit addresses, while IPv6 uses 128-bit addresses to provide a much larger address
space.
3. What are the key advantages of using NAT (Network Address Translation)?
NAT allows multiple devices on a private network to share a single public IP address, conserving
IP address space.
4. How does a router determine the best path for data to travel on a network?
Routers use routing tables and algorithms such as OSPF, BGP, or RIP to determine the most
efficient path.
5. What is the purpose of a subnet mask in networking?
A subnet mask divides an IP address into network and host portions, determining which part is
used for identifying the network.
6. Define the term “gateway” in the context of networking.
A gateway acts as an intermediary device that connects different networks, such as a local
network to the internet.
7. What is the difference between TCP and UDP?
TCP is connection-oriented and reliable, ensuring all packets are delivered, while UDP is
connectionless and does not guarantee packet delivery.
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, 8. What is ARP (Address Resolution Protocol) and how does it function in a network?
ARP maps an IP address to a MAC address to allow devices to communicate over a local network.
9. Explain what a VLAN (Virtual Local Area Network) is.
A VLAN segments a network into multiple smaller, isolated networks within the same physical
network infrastructure.
10. What is the function of DHCP (Dynamic Host Configuration Protocol)?
DHCP dynamically assigns IP addresses to devices on a network, simplifying network
management.
11. Describe the purpose of a firewall in network security.
A firewall controls incoming and outgoing network traffic based on predetermined security rules.
12. How does SSL/TLS encryption work in securing internet communications?
SSL/TLS encrypts data between a client and server, ensuring that sensitive information remains
private and secure.
13. What is the role of a DNS server in the context of web browsing?
A DNS server translates domain names into IP addresses so that web browsers can load the
requested websites.
14. Explain the function of a proxy server in networking.
A proxy server acts as an intermediary between a client and a server, often used for caching,
security, or bypassing restrictions.
15. What is a MAC address, and how is it used in networking?
A MAC address is a unique identifier assigned to a network interface card (NIC) and is used for
communication on a local network.
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