86. What is ICMP?
a) A protocol used for file sharing on a network
b) A tool used to test network connectivity
c) A network security system that monitors and controls incoming and outgoing network traffic
d) A set of rules for communication between devices on a network
87. What is a DNS cache?
a) A tool used to test network connectivity
b) A system that stores recently resolved domain name queries
c) A set of rules for communication between devices on a network
d) A protocol used for wireless network security
88. What is a traceroute?
a) A tool used to test network connectivity
b) A protocol used for wireless network security
c) A set of rules for communication between devices on a network
d) A system that prioritizes network traffic based on predefined rules
89. What is a hub?
a) A device that provides access to the internet for devices on a network
b) A device that connects two or more networks together
c) A device that provides wireless connectivity to a network
d) A device that broadcasts data to all devices on a network
90. What is a proxy ARP?
a) A protocol used for wireless network security
b) A system that translates public IP addresses to private IP addresses
c) A protocol used for communication between devices on a network
d) A technique used by a device to answer ARP requests on behalf of another device
