Networks

Networks

1. Switches

   • Switches connect devices on a LAN. Switches receive data ( in units called frames)from one devices and transmit this data to the device on the network with correct Mac Address.

2. network interface controller

   • A network interface card (nic) is an internal piece of hardware that Allows a device to connect to a network. These used to be on separate cards. Not nowadays they're built into the motherboard . NICs exist for both wired and wireless connections.

3. routers

   • Routers are responsible for transmitting data between networks theyre always connected to at least two different networks . Routers have crucial roe on the internet , directing data (in units called packets) to their destination Routers are used in home offices to connect the LAN to the internet

4. hubs

   • A hub broadcasts data to all devices on a network. This can use a lot of bandwidth as it results in unnecessary data being sent - not all computers might need to receive the data. A hub would be useful to link up a few games consoles for a local multiplayer game using a wired LAN

5. HUBS VS SWITCHES

   • Switches A switch performs a similar role to a hub and a bridge but is more powerful. It stores the MAC addresses of devices on a network and filters data packets to see which devices have asked for them. This makes a switch more efficient when demand is high. If, for example, a game involved lots of data being passed between machines, then a switch could reduce the amount of latency. Hubs A hub broadcasts data to all devices on a network. This can use a lot of bandwidth as it results in unnecessary data being sent - not all computers might need to receive the data. A hub would be useful to link up a few games consoles for a local multiplayer game using a wired LAN

6. Ethernet cable twisted pair

   • Ethernet cable are used to connect devicesin a lan the most common ehternet cable are CAT 6 . They are twisted pair cables , containing four pairs of copper wires which hare twisted together to reduce internal interference