1.4 cmp science

1.4 cmp science

1. LAN:local area network, is a switch connected network that is spread into a limited local area, and can be connected through a wired or wireless connection

   • WAN:wide area network, is a router connected network that is connected through a wide geographical area,does NOT use a wired neteork, it only uses wireless networks, and are usually owned by companies such as limewire or google, thus it needs a fee to use or the company pays a fee for others to use it
     • lan is cheaper than wan since it is not owned by a company who owns a network that is used on a daily basis and is expensive,as well as it taking up lesser area than wan.
       • advantages:can share files with other peers and can communicate with eachother via a peer to peer network and social media tools. the disadvantages are the fact that hacking is a medium level risk to local networks and servers, as well as all users being affected by a virus if the server catches one.

2. factors that affect the performance of networks: no. of users and devices,can slow down and crash if the limit of users is exceeded-error rate,the less reliable the connection the network has, the amount of errors that occur increases when data is transferred,this means the same data will have to be sent until it is accepted-transmission media, if the transmission is slow, the performance of the network is affected-bandwidth,if the band width is insufficient, it affects the performance of the computer network-latency,the delay before a transfer of data begins following an instruction for its transfer.