Computer networks, overview and security
What is the purpose of a router in a computer network?
To connect multiple networks together
To store and retrieve data
To protect against malware
To provide power to devices
What is the purpose of a firewall in network security?
To block unauthorized access to a network
To increase network speed
To encrypt data
To monitor network traffic
What is the purpose of an IP address in computer networking?
To identify devices on a network
To establish a secure connection
To encrypt data
To manage network traffic
What is the purpose of a proxy server in network security?
To act as an intermediary between clients and servers
To block all network traffic
To encrypt data
To monitor user activity
Which of the following is a common network port used for secure web browsing?
Port 80
Port 443
Port 22
Port 25
What is the purpose of a subnet mask in IP networking?
To determine the network portion of an IP address
To encrypt data
To establish a secure connection
To manage network traffic
What is the purpose of a MAC address in computer networking?
To uniquely identify network interfaces
To establish a secure connection
To encrypt data
To manage network traffic
Which of the following is a common network device used to connect multiple computers in a LAN?
Switch
Router
Modem
Hub
What is the purpose of an SSL certificate in web security?
To establish a secure and encrypted connection
To block all network traffic
To manage network traffic
To encrypt data
Which of the following is a common network protocol used for remote access to computers?
SSH
RDP
SMTP
FTP
What is the purpose of a VLAN in computer networking?
To logically divide a network into separate broadcast domains
To establish a secure connection
To encrypt data
To manage network traffic
Which of the following is a common network protocol used for sending and receiving files?
FTP
HTTP
SMTP
SCP
What is the purpose of a DHCP server in IP networking?
To automatically assign IP addresses to devices on a network
To encrypt data
To establish a secure connection
To manage network traffic
What is the purpose of a load balancer in computer networking?
To distribute network traffic across multiple servers
To block all network traffic
To encrypt data
To manage network traffic
Which of the following is a common network protocol used for sending and receiving emails from a mail client?
POP3
IMAP
FTP
SMTP
What is the purpose of a VPN tunnel in network security?
To create a secure and encrypted connection between two networks
To block all network traffic
To manage network traffic
To encrypt data
Which of the following is a common network device used to connect multiple networks together?
Router
Switch
Modem
Gateway
What is the purpose of a proxy server in web caching?
To store and serve frequently accessed web content
To establish a secure connection
To encrypt data
To manage network traffic
Which of the following is a common network protocol used for remote command execution?
SSH
Telnet
SMTP
RDP
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