The domain name system (DNS) is an internet service that translates domain names (like wired.com) into IP addresses (like 220.127.116.11).
We use domain names because people can remember words better than numbers, but web servers still need the IP numbers to access the page. Every time you use a domain name, a DNS server must translate the name into the corresponding IP address.
A bridge (not to be confused with a router) is a data network device used to connect two network segments of different protocols.
For example, if you want computers on a TCP/IP network to talk to computers on a token ring network, you need a bridge to connect the two segments.
Broadband is a general term used to describe any high-speed, high-bandwidth, “always on” internet connection.
Cable modems, DSL modems, satellite link-ups, and T1 lines are all broadband devices. Dial-up modems and other low-bandwidth devices are called “narrowband.”
Channels refer to the conduits in which to deliver content or data.
In web development, channels may refer to the data feeds allowing content onscreen without reloading the page or redrawing the whole screen. Channels may also refer to the paths a computer uses to transmit information between peripherals.
The dynamic host configuration protocol (DHCP) is an addressing protocol for TCP/IP networks.
IP addresses are leased to individual computers on the network from a DHCP server. DHCP allows users to move to different locations on a network without having to bother a network administrator (and they hate being bothered) to manually assign a new IP address. DHCP is useful in homes with several computers sharing a single high-speed internet connection.