Circuit Switching And Packet Switching Flashcards
why does the internet work
because the devices connected to it can transmit data to each other
how is every device on the internet somehow linked
- they are all interconnected
- but it doesnt mean that every device is connected to every other device
how is data likely to be transmitted if you were to send data from your computer to another
it is likely that the data would have to go through several devices on the way
what is circuit switching and packet switching
two methods used to transmit data from one device to another
how is a dedicated circuit set up in a network
it is set up with point to point connections between each of the nodes in a network
how many paths can data be be transmitted through in a network and does it even go through all of them
- the data could travel through any of the point to point connection between the nodes in a network
- but after one has been set up for a device
- it cannot change
what happens when data is being sent through a circuit
- the data is sent through a designated circuit from one node to another
- and after it is finished, the circuit is closed
what happens if the process of transmission from one device to another is interrupted
the whole process would usually start again
what can hackers do in a network with nodes connected in a point to point manner and why
- they can easily eaves drop on the data being sent
- because the data travels through several access points which can be tapped into
what happens in packet switching
- , the data being sent is broken into smaller chunks of data, called packets
- each packet is sent across the network
what is unique about how packets are sent across networks
- the packets do not need to all follow the same route
- nor do they even need to arrive in the same order in which they were sent
between packet and circuit switching, which one is better in terms of interruption compensation and why
- packet switching is better
- because in packet switching, if the transmission of a packet was interrupted, only that packet needs to be re-transmitted
where as in circuit switching, the data as a whole would need to be resent
between packet and circuit switching, which one is more secure against hakcers
- packet switching is better
- because packets can take different routes across a network
- so it is much harder to intercept all of the data at once
- where as with circuit switching, the data only travels through one circuit, so it can be easily intercepted
between packet and circuit switching, which one is better in terms of flexibility and why
- packet switching is better
- because if a network path were to be congested with traffic or shut down
- the packets of data can be routed along an alternate path
- where as in circuit switching, there is only one designated path that the data can travel through
- so if it is down, data cant be sent or the point to point connection will have to be re programmed
what do all packets contain, apart from the data that needs to be sent
- a source address
- a destination address
- an identification tag
- an error detection
- an error correction
