Google Certification Level 2 Associate Mock
Exam *Q&A* (100% Correct) 2025/2026
|VERIFIED|
What is the primary function of a router in a network?
A router is responsible for connecting different networks and directing data packets between them. It
determines the optimal path for data to travel from the source to the destination network.
A router connects multiple networks and forwards data between them based on routing tables
and protocols.
How does a DNS server contribute to the functioning of the internet?
DNS servers translate domain names (like www.example.com) into IP addresses that computers can
understand. This allows users to access websites using easy-to-remember domain names instead of
numerical IP addresses.
A DNS server resolves domain names into IP addresses, enabling users to connect to websites by
name rather than by IP.
Explain the difference between IPv4 and IPv6 addressing.
IPv4 addresses are 32-bit numerical identifiers, written as four octets separated by periods (e.g.,
192.168.1.1). IPv6 addresses are 128-bit identifiers, written as eight groups of four hexadecimal digits
separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334). IPv6 allows for a much larger
address space compared to IPv4.
IPv4 uses 32-bit addresses, while IPv6 uses 128-bit addresses, offering a significantly larger
address pool.
What does the term "subnet mask" refer to in networking?
A subnet mask is used to divide an IP address into network and host portions, helping routers determine
the network boundaries. It defines which part of the IP address refers to the network and which part
identifies the device within that network.
A subnet mask separates the network and host portions of an IP address, helping routers identify
network boundaries.
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,What is the purpose of a DHCP server in a network?
A DHCP server dynamically assigns IP addresses to devices on a network. This eliminates the need for
manual configuration and ensures that each device receives a unique IP address.
A DHCP server automatically assigns IP addresses to devices within a network.
What is the function of a switch in a network?
A network switch operates at the data link layer and connects devices within a local area network (LAN).
It uses MAC addresses to forward data packets only to the devices that need them, improving network
efficiency.
A switch forwards data between devices on the same network based on MAC addresses,
improving network efficiency.
What is the main difference between a hub and a switch in a network?
A hub broadcasts data to all devices in a network, leading to potential collisions and reduced
performance. In contrast, a switch sends data only to the specific device it is intended for, which
improves network efficiency and security.
A hub sends data to all devices, while a switch sends data only to the intended recipient device.
What is the significance of port forwarding in networking?
Port forwarding is the process of redirecting communication requests from one address and port
number combination to another. It allows external devices to access specific services within a private
local network.
Port forwarding redirects traffic from an external address to a specific device or service in a
private network.
What is the purpose of NAT (Network Address Translation)?
NAT is used to translate private IP addresses to public ones, enabling multiple devices on a local network
to share a single public IP address. This is crucial for conserving IP address space and enhancing network
security.
NAT allows multiple devices to share a single public IP address while maintaining private IP
addresses internally.
What is the difference between TCP and UDP in networking?
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,TCP (Transmission Control Protocol) is connection-oriented, ensuring reliable communication by
establishing a connection before transmitting data. UDP (User Datagram Protocol) is connectionless and
faster but does not guarantee data delivery or order.
TCP is reliable and connection-oriented, while UDP is faster but does not guarantee reliability.
How do you troubleshoot a network connection that is slow or intermittent?
Begin by checking the physical connections, ensuring cables are secure and not damaged. Verify that the
router and switches are functioning properly. Run a speed test and check for network congestion, then
verify the device’s IP configuration.
Start with physical checks, then test speed, check for congestion, and review IP configuration.
What is the purpose of a VPN (Virtual Private Network)?
A VPN creates a secure, encrypted connection over a less secure network, such as the internet, allowing
remote users to access internal network resources as if they were physically on the local network.
A VPN encrypts internet traffic to create a secure connection for remote users.
What is the role of ARP (Address Resolution Protocol) in networking?
ARP is used to map a device’s IP address to its physical MAC address on a local network. When a device
wants to communicate with another device, ARP helps find the MAC address of the destination device.
ARP maps IP addresses to MAC addresses on a local network to facilitate communication.
How does the OSI model help with understanding networking?
The OSI model is a conceptual framework that standardizes the functions of a network into seven layers,
from physical transmission to application-level communication. It helps identify and troubleshoot
networking issues by isolating specific layers.
The OSI model divides networking functions into seven layers, aiding in problem identification
and resolution.
What does the term "ping" mean in network troubleshooting?
Ping is a command used to test the connectivity between two networked devices. It sends ICMP echo
requests and measures the response time, helping diagnose network issues like packet loss or latency.
Ping tests network connectivity by sending ICMP echo requests and measuring response times.
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, What is a MAC address, and why is it important in networking?
A MAC address is a unique hardware identifier assigned to a network interface card (NIC). It is used at
the data link layer for communication within a local network, enabling devices to be uniquely identified.
A MAC address uniquely identifies devices on a local network at the data link layer.
What is the purpose of a firewall in a network?
A firewall acts as a barrier between a trusted internal network and untrusted external networks, such as
the internet. It filters incoming and outgoing traffic based on predefined security rules.
A firewall filters network traffic to protect internal networks from external threats.
What does the term "latency" refer to in a network?
Latency is the delay between sending a request and receiving a response. It is typically measured in
milliseconds and can be affected by factors like network congestion, distance, and hardware.
Latency refers to the time delay between sending and receiving data across a network.
What is the difference between a public and a private IP address?
A public IP address is assigned to devices directly connected to the internet and is unique across the
entire internet. A private IP address is used within a local network and is not routable on the internet.
Public IP addresses are globally unique and internet-accessible, while private IP addresses are
used within local networks.
How does Wi-Fi differ from a wired Ethernet connection in terms of speed and reliability?
Wi-Fi offers the convenience of wireless connectivity but is generally slower and less reliable than a
wired Ethernet connection. Ethernet provides a stable, high-speed connection, unaffected by physical
obstructions.
Wi-Fi is wireless and less reliable, while Ethernet provides a fast and stable wired connection.
What is an SSL certificate, and why is it important for secure communications?
An SSL (Secure Sockets Layer) certificate encrypts the connection between a web server and a browser,
ensuring that data transmitted between them is secure. It is essential for protecting sensitive data, such
as passwords and payment information.
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