A LAN connects computer devices within the same building through network cards installed in each device. Switches are used to connect the network cards and route data, operating at a higher speed than hubs and knowing which devices are linked to each port. Routers join multiple LANs together, connecting two or more networks and operating at the network layer. The TCP/IP protocol allows different operating systems and networks to communicate through the reliable TCP layer and IP address system which identifies each connected computer.

1. TYPICAL ELEMENTS IN A
LAN
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2. What is a LAN?
 Interconnect lots of different computer devices.
 Devices are usually in the same building.
 Private networks that allow users to share devices and
programs.
 Example : an Ethernet.

3. Network card
 Electronic device that connects a computer to a computer
network.
 Piece of computer hardware.
 Each has to have special communications card specific to
the type of Ethernet that is being set up.
 RJ45 port
 A cable with an RJ45 connector to connect the
communications card to the networking device.

4. Switch
 Active network element.
 RJ45 ports.
 Faster than hubs.
 Always know which nodes are connected to their ports.
 Stacks: the form how switches are connected.

5. Router
 Small physical devices.
 Join multiple networks together.
 Connects two or more networks.
 Operates at the network layer.

6. Protocol TCP/IP.
 Thanks to this protocol, different operating systems and
different networks can communicate each other.

7. TCP/IP
 TCP provides reliable transfer of information transmitted
across the network.
 The protocol IP transfers information to the destination
computer.

8. IP address
 All computers that are connected to the Internet must be
identifiable.
 Helps to identify computers easily.

9. Thanks for your attention