41. What is a DNS server?
a) A device that connects multiple devices in a LAN
b) A device that connects computers to the internet
c) A device that resolves domain names to IP addresses
d) A device that protects a network from unauthorized access
42. What is a switch?
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
43. What is latency?
a) The maximum amount of data that can be transmitted over a network in a given time period
b) The frequency of network signals
c) The delay in the transmission of data over a network
d) The physical width of a network cable
44. Which layer of the OSI model is responsible for establishing, managing, and terminating sessions between applications?
a) Physical layer
b) Data Link layer
c) Session layer
d) Transport layer
45. What is the purpose of the HTTP protocol?
a) To transfer files over the internet
b) To send and receive email messages
c) To browse web pages on the internet
d) To manage network connections
