3.3 network topologies Flashcards
client server network
client makes request to server
large services like amazon need very powerful servers to handle millions of requests per sec
client is completely dependant on the server to provide and manage the information
server control security , backups and can be upgraded to manage higher demand
client server network advantages
network can be controlled centrally from the server and easily back up data and update software
hardware/software and resources can be shared e,g printers applications etc
improved scalability meaning more clients can be added to the central server
client server network disadvantage’s
large amounts of traffic congestion cause network to slow down
if a fault occurs with the server then the whole network will fail
IT technicians required to manage and maintain the network
malware and viruses can spread quickly
peer to peer advantages
is a simpler network to set up as no server is required
clients are not dependent on a server
perfect for quickly sharing files between systems
peer to peer network
data is shared directly between systems without requiring a central server
optimal for sharing files
peer to peer disadavantages
without a dedicated server there is no central device to manage security or backups
computer performance will decrease with more devices connected to the network
bus topology
the bus transfers data packets along the cable
the computer checks the destination address to see if it matches its own address
is address deos not match the pc system passes the data packet t the next system
if matches the packet is accepted and processed
both ends are terminators
bus topology advantages
easy to attach another system without disrupting the whole network
quick to set up once the main cable is established making it optimal for temporary networks
cost effective because it usually contains less cabling than other topologies and requires no additional hardware
bus topology disadvantages
poor security as data packets are passes on to each system on the network
data collisions are likely/ resending data is slows down the network
main cable will have limited length which can become crowded and slows network speeds as more systems are attached
main cable must also be terminated properly
token ring topology
all systems are connected in a ring or a loop
a token small data packet is sent around in the ring in one direction being passed through the computer systems
token ring topology advantages
data collisions are avoided as data packets are transmitted in one direction
attaching more systems to a ring topology wont affect the transfer speed as much as bus because data is transferred at a consistent speed
token ring topology disadvantages
is any systems on the network fails then the whole network fails as the loop is broken and data cant be transferred to all systems
to add a new system to a ring topology the network must be temporarily shut down
star topology
each computer system is connected to a central node: hub or switch
star topology advantages
improved security because data packets are sent directly to and from the hub/switch
new systems can be added directly to the central system so the network doesn’t need to be shut down
transfer speeds are generally fast in a star topology as there are minimal network collisions
mesh topology
each computer system is connected to every other computer system
data packets are transferred to the destination address along the quickest path travelling from node to node
if the path is broken there are many alternative path options that the packets can take
