WorksheetsUnderstanding Networks and Protocols
Total questions: 30
Worksheet time: 15mins
Which of the following best describes a Local Area Network (LAN)?
A network that connects computers across different countries
A network that connects computers within a limited area, like a building or campus
A network that connects only wireless devices
A network that is only used for internet access
What is the main function of a router in a network?
To store files for users
To direct data packets between different networks
To provide power to network devices
To block all incoming traffic
Which protocol is primarily used to transfer web pages over the Internet?
FTP
HTTP
TCP
DNS
What is the main difference between HTTP and HTTPS?
HTTPS is slower than HTTP
HTTPS encrypts data, while HTTP does not
HTTP is used for emails, HTTPS is for websites
HTTP is only for local networks
Which device is responsible for connecting a local network to the Internet?
Switch
Modem
Firewall
Printer
What does the acronym DNS stand for?
Digital Network System
Domain Name System
Data Network Service
Direct Name Server
Which of the following is a unique identifier assigned to each device on a network?
Bandwidth
IP Address
Protocol
Firewall
What is the primary purpose of a firewall in a network?
To increase bandwidth
To protect the network from unauthorized access
To assign IP addresses
To connect to the Internet
Which protocol is used for secure file transfer over the Internet?
HTTP
FTP
HTTPS
TCP
What is the main function of a switch in a network?
To connect different networks together
To forward data only to the device it is intended for within a LAN
To provide wireless access
To block malware
Which of the following best describes a Wide Area Network (WAN)?
A network limited to a single room
A network that covers a large geographic area, such as a city or country
A network used only for wireless devices
A network that does not use the Internet
What is the main purpose of a VPN (Virtual Private Network)?
To increase download speed
To create a secure connection over a public network
To assign IP addresses
To block all incoming emails
Which version of IP addresses uses 128 bits and is written in hexadecimal?
IPv4
IPv6
DNS
HTTP
What does bandwidth refer to in networking?
The number of devices on a network
The amount of data that can be transmitted in a given time
The physical size of a network
The security level of a network
Which protocol is responsible for breaking data into packets and ensuring they are delivered correctly?
HTTP
TCP
DNS
FTP
Which of the following is NOT a function of encryption in networking?
Protecting data from unauthorized access
Making data unreadable to outsiders
Assigning IP addresses
Securing communication
What is the main role of authentication in network security?
To increase bandwidth
To verify the identity of users or devices
To assign IP addresses
To connect to the Internet
Which of the following best describes malware?
A type of network device
Malicious software designed to harm or exploit systems
A secure protocol
A type of IP address
How does the Domain Name System (DNS) help users access websites?
By encrypting data sent over the Internet
By translating domain names into IP addresses
By increasing bandwidth
By blocking malware
Which of the following is a private network accessible only to an organization’s members?
Internet
Intranet
WAN
VPN
Suppose you are setting up a network for a school. Which devices would you use to connect multiple computers within a single building and why?
Modem, because it connects to the Internet
Switch, because it efficiently connects multiple computers within a LAN
Firewall, because it blocks malware
VPN, because it encrypts data
A company wants to allow employees to securely access the company network from home. Which technology should they implement and why?
HTTP, because it is used for web pages
VPN, because it creates a secure connection over the Internet
DNS, because it translates domain names
Modem, because it connects to the Internet
You notice that your Internet connection is slow when many people are using it at the same time. What network concept explains this situation?
Bandwidth, because it limits the amount of data that can be transmitted at once
Firewall, because it blocks traffic
DNS, because it translates names
Switch, because it connects devices
A website address is entered into a browser, but the site does not load. Which network component might be causing the problem and why?
Switch, because it forwards data within a LAN
DNS, because it may not be translating the domain name to the correct IP address
Firewall, because it increases bandwidth
Modem, because it encrypts data
If a hacker intercepts data sent over HTTP, what security risk is present and how can it be mitigated?
Data is encrypted, so there is no risk
Data is unencrypted and can be read; using HTTPS can encrypt the data and prevent this
The IP address is hidden, so there is no risk
The firewall will always block the hacker
A company wants to prevent unauthorized users from accessing its internal network. Which device or technology should they use and why?
Switch, because it connects devices
Firewall, because it filters and blocks unauthorized access
Modem, because it provides Internet access
DNS, because it translates domain names
Why is IPv6 being adopted to replace IPv4 in many networks?
IPv6 is slower than IPv4
IPv4 addresses are running out, and IPv6 provides a much larger address space
IPv6 is only for wireless networks
IPv4 is more secure
A user is unable to access a company’s intranet from outside the office. What is the most likely reason?
Intranets are private networks accessible only within the organization
The Internet is down
The firewall is off
The switch is broken
How does encryption help protect sensitive information sent over a network?
By making the data unreadable to anyone except authorized users
By increasing bandwidth
By assigning IP addresses
By connecting devices
A user receives a suspicious email attachment that installs unwanted software on their computer. What type of threat is this, and what is a good way to prevent it?
It is a firewall; prevention is not possible
It is malware; prevention includes using antivirus software and not opening unknown attachments
It is a switch; prevention is to disconnect from the network
It is bandwidth; prevention is to increase speed
