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Routers Router is a Layer 3 device used to connect two or more logically separate networks. Routers forward packet based on IP address. All ports in a router are individual broadcast domain & individual collision domain. More on Routers Brouters Brouters are basically routers that can also bridge. A Brouter will first check to look if it supports the routing protocol being used by the packet. If not, instead of dropping the packet, the packet is bridged using hardware address information. Brouters act as routers to connect different networks both LAN & WAN and also act as a bridge to share files between computers connected to the same brouter. Bridges Bridge is a Layer 2 device used to connect two LANs which are using same protocols like Ethernet or Token Ring. Wireless access point is an example of bridge. Bridges create multiple collision domains and single broadcast domain. More on Bridges Switches Switches are multi-port bridges. A switch can operate in La...

MODEMS MODEM – MO dulator/ DEM odulator MODEM is a network device which converts a computer’s digital signals to an analog transmission signal to use with telephone lines or cable TV lines or satellite connections and vice-versa. MODEMS are necessary because public telephone lines, cable lines, and microwave media use electromagnetic waves, but computers use electric pulses. Modems are used when more than one communication is to occur in the same medium. Modems can be selected to use different electromagnetic frequency bands. Some of the different types of Modems are Dial-up Modems, DSL modems, cellular modems, Broadband Modems etc.. REPEATERS Repeaters are also known as signal boosters, signal amplifiers, Range extenders or signal regenerator. Repeaters receive the inbound electrical, optical or wireless signals and retransmit the signals. One type of repeaters amplifies all incoming electromagnetic waves, including undesirable noise. It is called as amplifiers. Anothe...