Two different networks are connected by a router. Switches are used to connect network devices within networks.
Gateway
The purpose of a router is to connect dissimilar networks.
For two or more connected networks you can use a bridgeto connect them all together.It depends on the two networks. A bridge can only connect two networks of the same type (eg Ethernet or Token-Ring), that also use the same layer 3 network address (eg IP subnet or IPX network #, or AppleTalk network #).A "gateway" device can connect two dissimilar types that share a network address, and a router can connect two networks of different network addresses whether or not they have the same network type.
The mobile node communicates with a similar agent on the user's home network, known as home agent, giving the home agent the care-of-addressof the mobile node; the care of address identifies the foreign agent's location.
No
The number of routers in a network depends on some factors like number of hosts in the network,number of networks required e.t.c. but when it comes to the question, the question itself is meaningless bcaz a router is a device which connects two different networks. for example there r 2 systems namely host A with an ip address of 192.168.1.6 and host B with an ip address of 192.168.2.8 with the above configuration host A cannot communicate with host B bcaz they both belong to 2 separate networks. but if both their networks are connected using a router they both can communicate with each other.
computers in one office
No. A hub is hardware that connects different devices within a single network. You probably are thinking of a switch or router.
Node to node delivery is a general networking reference and is often contrasted with end-to-end delivery. The terms apply equally well to delivering mail and sending data over over the Internet. It helps to have a specific example illustrating the meaning of "network" within the context of the reference to node-to-node, but the general idea is pretty universal. A network is normally made of of connections between many points. Any connection between two of those points without an intervening point is a node-to-node connection. If you are driving a delivery truck, the path between to stops is the node-to-node path and what comes from one stop to the next is a node-to-node delivery. Networks usually have nodes where things enter the network or leave it. If a delivery is to go from and entering point to a leaving point, it is an end-to-end delivery and may involve many or few intermediate node-to-node transportation transfers. Needless to say, there are may variations of nodes and connections and communication strategies in the various networks, so there is this vocabulary that is useful that is general for many types of networks.
Connecting different networks requires a router
Gateway
Typically you would need a gateway for this purpose, because the protocols are very different. In my HP server, for example, I have two NIC cards; one of the NICs connects to a Token Ring network and the other connects to an Ethernet network. The software in the HP server (gateway) manages the translation between the two different types of networks.
The purpose of a router is to connect dissimilar networks.
a router with relevant different interfaces
That would be a WAP - Wireless Access Point, which operates as a bridge between the two network types.
The area between two successive nodes is referred to as an internode. The node is the area where a leaf connects to the stem.
router is used to communicates two different networks.
super glue