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Flashcards in network topologies Deck (13):
1

what is meant by the term topology?

how devices in a network are arranged and linked together.

2

Describe a star network

Each device is connected individually (by a cable), to a central point.
the central device controls the network and is usually a switch or a hub.

3

what are the advantages of a star network?

devices can be easily added, without disrupting the network.
network traffic is minimal.
if one link fails, other devices continue to operate.
it is secure as messages from device go directly to centre.

4

what are the disadvantages of a star network?

expensive, due to cabling.
if the central point fails, so will the entire network

5

Describe a bus network

each device is connected to a main cable called the bus, ended by terminators.
only one device can transmit (transfer) at any one time.

6

what are the advantages of a bus network?

easy and inexpensive to install, as less cabling is required
easy to add devices.

7

what are the disadvantages of a bus network?

lots of network traffic, due to frequent collisions, which slows performance.
if main cable fails, so will the entire network.
if a terminator fails, so will the entire network.

8

Describe a ring network

devices are connected to adjacent devices in a ring.
devices take turns to transmit, controlled by passing a token around.
devices with the token, can only transmit.
transmission occurs all in one direction

9

what are the advantages of a ring network?

data transmission is simple, as it only occurs in one direction.
no collisions occur due to token.
not dependant on a central device

10

what are the disadvantages of a ring network?

if one device is switched off, data transmission will not occur.
if main cable fails, so will the entire network.

11

Describe a mesh network

Each device is connected to all other devices in the network.
each device sends and relays its own signals.

12

what are the advantages of a mesh network?

transmission can occur simultaneously
if one link fails, there are alternative routes for data.
can handle high volumes of network traffic.
data transmission is efficient, regardless of how many devices.are in the network.

13

what are the disadvantages of a mesh network?

overall cost is high due to cabling.
difficult to manage and requires expert management.