What layer does a router run on?

What layer does a switch run on?

What are three differences between a hub and a switch?

What connects many, sometime disparate, network segments together to form an internetwork?

Will a router work out of the box when plugged into a network?

What does a Firewall do?

What is the main function of a DHCP server?

What is a Fully Qualified Domain Name - FQDN?

What is the process of finding the IP address for any given host name called?

What does an A record store?

What does an MX record point to?

What is a CNAME record?

What is a PTR record?