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Updated!! Google IT Support Professional Certification - Course 2: The Bits and Bytes of Networking Mock Exam *Q&A* (100% Correct) 2025/2026 |VERIFIED| £7.36
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Updated!! Google IT Support Professional Certification - Course 2: The Bits and Bytes of Networking Mock Exam *Q&A* (100% Correct) 2025/2026 |VERIFIED|
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Module
Google IT Support Professional Certificate
Institution
Google IT Support Professional Certificate
Updated!! Google IT Support Professional
Certification - Course 2: The Bits and Bytes
of Networking Mock Exam *Q&A* (100%
Correct) 2025/2026 |VERIFIED|
What is the function of an IP address within networking, and why is it essential for devices in a network
to have unique IP addresses?...
Updated!! Google IT Support Professional
Certification - Course 2: The Bits and Bytes
of Networking Mock Exam *Q&A* (100%
Correct) 2025/2026 |VERIFIED|
What is the function of an IP address within networking, and why is it essential for devices in a network
to have unique IP addresses?
An IP address acts as a unique identifier for each device connected to a network, ensuring data
packets are correctly sent and received. Unique addresses prevent communication conflicts, making it
possible for devices to find and exchange data with one another seamlessly.
Explain how a subnet mask works and why it is used alongside an IP address.
A subnet mask determines which part of an IP address is allocated to the network and which part
identifies individual devices (hosts). It segments a network into sub-networks, improving organization,
performance, and security by separating devices into different subnet groups.
How does the Transport Control Protocol (TCP) provide reliability in data transmission, and what
mechanisms does it use to ensure data integrity?
TCP provides reliable data transmission by using error-checking, acknowledgments,
retransmissions of lost packets, and flow control mechanisms. It ensures data packets are delivered in
the correct order without duplication, with checksums used to verify data integrity.
Discuss the differences between a router and a switch in terms of their functions in a network.
Routers connect multiple networks and direct data packets based on IP addresses, enabling
devices in different networks to communicate. Switches, however, operate within a single network and
use MAC addresses to forward data directly between devices, optimizing local data flow.
Why is the Domain Name System (DNS) critical for internet usage, and what problem does it solve?
DNS is essential because it translates human-readable domain names into IP addresses, allowing
users to access websites using easy-to-remember names instead of complex numeric addresses. This
system simplifies navigation on the internet.
1
, Describe how Network Address Translation (NAT) works and its primary purpose within networking.
NAT allows a single public IP address to be shared among multiple devices on a private network.
It translates private IP addresses to a public one and vice versa, enabling communication with external
networks while providing a layer of security and conserving IP addresses.
What is a MAC address, and how is it different from an IP address?
A MAC (Media Access Control) address is a hardware identifier unique to a device's network
interface card (NIC), used within local networks for communication. An IP address, on the other hand, is
assigned logically and can change over time, facilitating communication across different networks.
Explain what a packet is and describe the main components of a data packet in networking.
A packet is a small unit of data transmitted over a network. Its main components include a
header (containing source and destination addresses, protocols, etc.), a payload (the actual data being
transmitted), and a trailer (often including error-checking information).
What is meant by bandwidth in networking, and how does it affect data transmission?
Bandwidth refers to the maximum amount of data that can be transmitted over a network
connection in a given period. Higher bandwidth allows more data to be transmitted at once, improving
network speed and reducing congestion.
Describe what a firewall does in a network and how it can be configured to protect network traffic.
A firewall monitors and controls incoming and outgoing network traffic based on predetermined
security rules. It can block or permit data packets based on IP addresses, ports, or protocols, thus
protecting networks from unauthorized access and potential threats.
Explain the difference between TCP and UDP, focusing on their respective advantages and disadvantages.
TCP (Transmission Control Protocol) is reliable, ensuring data integrity and order, making it
suitable for critical applications. However, it is slower due to overhead like acknowledgments. UDP (User
Datagram Protocol) is faster but less reliable since it lacks error-checking and flow control, making it
useful for time-sensitive data like video streaming.
Discuss the purpose and operation of the OSI (Open Systems Interconnection) model.
2
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