3.4 connection methods Flashcards
Local area network (LAN)
Local area network is a network in which the computer systems are all located relatively close to each other
name a type of LAN
wired ethernet LAN, ethernet is a protocol that controls how data is transmitted over a lan
LANs have high _______________?
high bandwidth so data can be transferred quickly because it uses cables the data is harder to intercept then a wireless network
Metropolitan Area Network (MAN)
covers the range of a town or city for example a uni campus
usually very efficient at providing fast communication for cities with high connection speeds through the use of fibre optic cables
Wide area network (WAN)
network spanning a large geographical area such as multiple cities or countries
ADSL (Asymmetric digital subscriber line)
is a method of transferring data across copper wire telephones
ADSL characteristics
microfilter required to allow internet and telephone access at the same time
while bandwidth is high is not as secure as other methods such as leased line and firewalls or VPN
ADSL is contended which means that connection speeds are affected and slowed down with more systems that use the network at the systems
leased line
method of providing uncounted fixed bandwidth data connections
leased line characteristics
use maintains a dedicated connection that is more secure and because it is contended will have the same speed all of the time regardless of how busy it is
bandwidth is high , security is better
the connection speed is constant and the network is full duplex allowing for data transmission at both directions
high price tag
CSU/DSU is required to properly terminate the leased line
ISDN (integrated services digital network)
transmits video and voice data simultaneously over traditional copper telephone wires, this method uses a circuit switched network where all data packets take the same route between computer systems
PSTN (public switched telephone network)
global collection of wired public telephone networks that are used to transmit data over a long distance
fixed into position therefore more consistent network quality
uses a wired connection like a PSTN is more reliable and communicatoin will be clearer
Cellular
cellular networks require a cell or transmitting tower to be in close proximity to the communication device
cellular networks have greater range that PSTN but this is point to point communication method can be disrupted
each cell tower is also connected to the PSTN
Satellite
point to point communication
beneficial in remote locations
large files may take longer and it is not recommended for low latency needs such as games
diagrammatical representation
connection type
devices
security methods
