1.3.1 ( Networks Questions ) Flashcards
Partial Mesh Topology Definition:
Partial meshes are highly flexible topologies that can take a variety of very different configurations.
Description of a Partial Mesh Topology:
In partial-mesh topology, some of the devices are connected to many devices together, but other devices are connected only to one or two devices.
Hardware Required
Computers, switches ,cabling.
Define the term, ‘network topology’ (1 mark)
The arrangement of connections within a network (1 mark)
Define the term, ‘node’ (1 mark)
A device connected to a network (1 mark)
Define the term, ‘network traffic’ (1 mark)
The amount of data being sent around the network (1 mark)
Explain what is meant by a ‘star network’, and state two advantages of this topology. (3 marks)
A network in which data traffic is routed through a single central node (1 mark)
Plus TWO from:
Reliable – if one connection fails it does not affect the others (1 mark)
Data collisions are rare (1 mark)
Good security – workstations have to go through the server (1 mark)
Simple to add or remove nodes (1 mark)
Scalable (1 mark)
Explain the difference between a hub and a switch (2 marks)
A hub will send out data packets to all connected devices (1 mark)
While a switch will send them only to the intended destination (1mark).
Provide one example, other than equipment expense, of a downside to setting up a network using star topology. (1 mark)
Experts are needed to install the network (1 mark)
If the central node fails, the entire network will go down. (1 mark)
Cost of setting up the network, hubs and switches may be required (1 mark)
Describe a situation in which a mesh topology would be advantageous for a network, providing reasons. (2 marks)
Wi-Fi network (1 mark) no central node needed (1 mark)
Definition of Star Topology:
A star topology is a topology for a Local Area Network (LAN) in which all nodes are individually connected to a central connection point, like a hub or a switch.
Description of Star Topology:
The star network topology has a central device directly connected to all other nodes. Just like a star shape.
Hardware required for Star Toplolgy:
The central node could be a hub, a switch or a server.
Advantages of STAR TOPOLGY NETWORK:
It is very efficient, relatively low cost, and fairly simple to set up.
Star networks are very reliable. If one connection fails, it does not affect other users
Very few data collisions as each node has its own cable to the server
Good security - no workstation can interact with another without going through the server first
Simple to add or remove a node as it has no effect on any other node
Scalability - can add many new nodes.
Disadvantages of STAR TOPOLGY NETWORK:
The most expensive network layout to install because of the amount of cables needed
Installing the network usually needs experts to set it up
Extra hardware such as hubs and switches may be needed
If the central switch or server fails, the whole network is down
Requires a high performance switch or server in the centre as all traffic passes through it.
