26. Which protocol is used for sending email messages?
a) HTTP
b) FTP
c) SMTP
d) SSH
27. What is a router?
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
28. What is a VLAN?
a) A type of network cable
b) A portion of a network
c) A group of interconnected networks
d) A virtual LAN that allows devices to be grouped together logically
29. What is a modem?
a) A device that connects multiple networks
b) A device that converts digital signals to analog signals for transmission over telephone lines
c) A device that connects computers to the internet
d) A device that connects multiple devices in a LAN
30. What is a packet?
a) A type of network cable
b) A portion of a network
c) A group of interconnected networks
d) A unit of data that is transmitted over a network
