Cisco Certified Network Associate (CCNA)
FINAL EXAM Question and Answers [100%
Correct] 2025 Latest Release!
What is the primary function of network devices like routers and firewalls?
Network devices such as routers, firewalls, and repeaters act as intermediaries that manage
traffic between different network segments and ensure secure, optimized communication between
hosts.
How do network applications like File Transfer Protocol (FTP) differ from other file-sharing methods?
FTP is specifically designed for transferring files between devices over a network, providing a
standard method to send and receive files securely, while other methods like SMB or NFS may offer
different protocols for file access.
What is the benefit of using a high availability (HA) network application in a computer cluster?
High availability ensures that if one computer in the cluster fails, another takes over the
workload, minimizing downtime and maintaining continuous service.
How does Parallel Processing enhance the performance of networked computer clusters?
Parallel processing allows multiple computers in a cluster to work simultaneously on tasks,
significantly speeding up data processing and improving overall system reliability.
What is the purpose of a Domain Name System (DNS) server in a network?
A DNS server translates human-readable domain names into IP addresses, allowing devices to
locate and communicate with each other using numerical addresses on the network.
How does a hub differ from a switch in terms of network communication?
A hub broadcasts data to all connected devices, leading to potential collisions, while a switch
directs data only to the specific port where the destination device is located, improving network
efficiency and reducing collisions.
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,How does a switch improve network efficiency compared to a hub?
A switch directs data only to the device with the corresponding MAC address, reducing
unnecessary network traffic and limiting the collision domain, while a hub sends data to all devices,
leading to possible collisions.
What is the purpose of a repeater in a network?
A repeater amplifies the signal it receives and retransmits it to extend the range of the network,
ensuring data can travel over longer distances without degradation.
What are the potential consequences of a broadcast storm in a network?
A broadcast storm occurs when multiple devices continuously send broadcast queries, leading to
network congestion and performance degradation as all devices receive unnecessary traffic.
Why is it important to limit the size of collision domains in a network?
Limiting collision domains reduces the likelihood of data collisions, which can significantly slow
down the network. Smaller segments allow for faster and more efficient data transmission.
How does the physical layer of a network operate with devices like hubs and repeaters?
The physical layer involves the transmission of raw data signals. Devices like hubs and repeaters
operate at this layer by forwarding signals and ensuring that data can travel across the network.
What is the function of a bridge in a network, and how does it differ from a switch?
A bridge connects two network segments and filters traffic based on MAC addresses using
software. While similar to a switch, a bridge is generally slower and less efficient, making switches the
preferred option in most modern networks.
What does a collision domain represent in a network?
A collision domain is an area of the network where data frames can collide if two devices attempt
to send data simultaneously. Smaller collision domains help minimize the risk of these collisions and
improve overall network performance.
How do switches enhance network performance compared to bridges?
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, Switches are more efficient than bridges because they use hardware to process and forward data,
reducing latency and increasing the speed of data transmission within a network.
What is the role of bandwidth in network data transfer?
Bandwidth determines the maximum amount of data that can be transmitted over a network at
any given time, impacting the speed and efficiency of data transfer across network connections.
How do network applications like VoIP and Video over IP function in modern networks?
VoIP and Video over IP transmit voice and video signals in the form of data packets over IP
networks, enabling internet-based communication services like phone calls and video streaming.
What makes the Domain Name System (DNS) essential for internet navigation?
DNS enables users to access websites using domain names instead of remembering numeric IP
addresses, simplifying the process of locating and connecting to servers on the internet.
How does a network switch improve the handling of data frames in comparison to a hub?
A switch forwards data frames based on the MAC address of the destination device, ensuring that
only the intended recipient receives the data. This reduces unnecessary traffic and improves network
efficiency compared to a hub, which broadcasts data to all devices.
What is the purpose of using high availability (HA) in network clusters?
High availability (HA) ensures that if one host fails, another can seamlessly take over, maintaining
service continuity and minimizing downtime in critical network applications.
What is the significance of limiting broadcast domains in network design?
Limiting broadcast domains helps reduce unnecessary network traffic, which improves overall
performance by preventing excessive broadcast queries from affecting all devices on the network.
What is a bridge's role in reducing network congestion?
A bridge connects different segments of a network and filters traffic based on MAC addresses,
preventing unnecessary communication between devices that do not need to interact, thereby reducing
congestion.
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, What is the primary purpose of computer networks?
Computer networks were developed to combine the computing power of multiple devices,
starting from local networks and expanding to global ones. These networks allow for communication
between different computer hosts.
How do computer host devices function within a network?
Computer host devices, such as servers, personal computers, smartphones, and laptops, serve as
points of access to a network. They can either provide services and resources or be clients using those
services. Each host is assigned at least one network address for identification.
Which devices play a crucial role in optimizing communication within a network?
Network devices like switches, routers, hubs, repeaters, and firewalls are responsible for
managing and improving communication between host devices within a network.
What does the World Wide Web (WWW) enable through its network applications?
The World Wide Web is a network application that facilitates the exchange of web pages coded in
HTML using HTTP. Over time, it has evolved to support dynamic and multimedia content beyond simple
hyperlinks.
Which network application is the most commonly used for exchanging messages?
Electronic Mail (Email) is the most widely used network application, allowing communication
between hosts by sending and receiving messages over the network.
What are the purposes of file transfer and file sharing network applications?
File transfer applications, such as FTP and SMB, enable the movement of files between host
devices across a network. These tools ensure that files are securely transferred from one host to another.
How does remote control technology function in a network?
Remote control applications allow users to control a computer from another device over the
network. Examples include Windows Remote Desktop and Virtual Network Computing (VNC), which
enable remote access to hosts for control and troubleshooting.
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