36. Which protocol is used for file transfer over the internet?
a) HTTP
b) FTP
c) SMTP
d) SSH
37. What is a hub?
a) A device that connects multiple devices in a LAN
b) A device that connects computers to the internet
c) A device that connects multiple networks
d) A device that protects a network from unauthorized access
38. What is a ping?
a) A protocol used for remote access to a network
b) A unit of data that is transmitted over a network
c) A tool used to test network connectivity
d) A type of network cable
39. Which layer of the OSI model is responsible for routing data between different networks?
a) Physical layer
b) Data Link layer
c) Network layer
d) Transport layer
40. What is a subnet mask?
a) A unique identifier assigned to a network interface controller
b) A value used to divide a network into smaller subnetworks
c) A device that connects multiple devices in a LAN
d) A protocol used for remote access to a network
