CompTIA Network+

What layer of the OSI model is responsible for routing and forwarding data packets?

• Layer 3

• Layer 9

• Layer 5

• Layer 7

Which TCP/IP protocol is used for transferring files between systems?

• HTTP

• SMTP

• SSH

• FTP

What network device operates at Layer 2 of the OSI model?

• firewall

• router

• switch

• hub

What is the purpose of subnetting in networking?

• To efficiently utilize IP addresses by dividing a larger network into smaller subnetworks.

• To decrease network performance by adding unnecessary complexity

• To limit the number of devices that can connect to the network

• To increase network security by hiding IP addresses

What type of wireless network uses radio waves to communicate?

• Wi-Fi

• Satellite

• Ethernet

• Bluetooth

What is the primary goal of network security?

• Protecting the integrity, confidentiality, and availability of data

• Allowing unauthorized access to sensitive information

• Ignoring potential security threats

• Ensuring data is always accessible to everyone

Which layer of the OSI model is responsible for logical addressing?

• Data Link Layer (Layer 2)

• Network Layer (Layer 3)

• Physical Layer (Layer 1)

• Transport Layer (Layer 4)

What is the default subnet mask for a Class C IP address?

• 255.255.255.255

• 255.0.0.0

• 255.255.0.0

• 255.255.255.0

What network device is used to connect multiple networks together?

• modem

• switch

• firewall

• router

What encryption protocol is commonly used to secure wireless networks?

• WEP

• WPA3

• AES

• WPA2