11. What is the purpose of a default gateway?
a) To connect two LANs
b) To connect two WANs
c) To connect a LAN to a WAN
d) To connect a computer to a LAN
12. Which protocol is used for transferring files between computers over the internet?
a) FTP
b) HTTP
c) SMTP
d) DNS
13. Which layer of the OSI model is responsible for ensuring that data is delivered without errors?
a) Physical layer
b) Data Link layer
c) Transport layer
d) Network layer
14. What is a MAC address?
a) A unique identifier assigned to a network adapter
b) An IP address used for local network communication
c) A type of network cable
d) A protocol used for remote access to a network
15. What is the purpose of a DNS server?
a) To convert domain names to IP addresses
b) To convert IP addresses to domain names
c) To provide secure remote access to a network
d) To transfer files between computers over the internet
