Networks

Networks

1. Interconnection devices

   • Router
     • AIM: different networks (to connect the devices to another networks)
   • Hub
     • AIM: connect the computers on the same network
       • Switch
     • A hub sends data packets to all devices on the network. A switch sends the packets to only the intended recipients.

2. Aims

   • To share
     • Data
     • Physical resources

3. Components

   • Software
     • tcp protocolo
       • Ip, mask, etc
   • Hardware
     • Nik
       • They enable computers to connect to a network, they are small circuit boards.
     • Transmission ways
       • Twisted pair electric sinals
         • Fibre optic cable is more expensive but has a higher data transfer rate than copper cable.
       • Optical fibre
         • It is more expensive than the copper cable but it is faster.
       • wifi
         • transimited by:waves

4. Types

   • Depending on the size
     • WAN
       • When multiple LAN networks are connected with each other
     • LAN
       • A network within the same building, it can be connected to the internet or nA LAN (local area network) is a connection of computers and peripheral devices located on a single site. A single site could have many buildings, eg your school my have more than one building, but it is still classed as one site.
   • Others
     • VLAN
     • INRANET

5. Commands

   • ping
     • Ping is used to verify whether or not a network data packet is capable of being distributed to an address without errors. The ping is commonly used to check for network errors.
   • tracert
   • ipconfig