Q 5.paper 2,june 12. Networks that uses different technologies can be connected using

Options(A) Packets            (B)Switches     (C) Bridges          (D) Routers.

Answer (D). Routers.

Explanation: Passive hubs works below the physical layer.

Active hub works on the physical layer.

Bridge or two layer switch works on physical and data link layer.

Router or three layer switch works on the physical ,data link and network layer.

Gateway works on the all the five layers.

A router normally connects Lan and wan using different technologies and has a routing table for routing . A set of switches and routers are interconnected to form a Wide Area Network. The switches can be connected in different topologies such as full mesh and half mesh. A wide area network may be privately owned or rented from a service provider, but the term usually connotes the inclusion of public (shared user) networks.