Network Topolgy And Group Types Flashcards
Network Topology
Description of the arrangements of nodes (e.g. networking switches and routers) and connections in a network, often represented as a graph
Maps the way different nodes on a network — including switches and routers — are placed and interconnected, as well as how data flows
Types of Network Topologies
- Logical Network Topology
- Physical Topology
Logical Network Topology
- Underlay
- A conceptual representation of how devices operate at particular layers of abstraction
- maps the actual connections in a network, such as wires and cables and the placement of various components
Physical Topology
- Overlay
- Details how devices are physically connected
- Shows how data flows within a network and from one device to another, regardless of the physical connections among devices
6 Types of Network Topology
- Bus
- Ring
- Star
- Tree
- Mesh
- Hybrid
Bus Topology
Network type where every device is connected to a single cable that runs from one end of the network to the other.
Aka line topology bold text
Advantages & Disadvantages of Bus Topology
Advantages:
- Keep the layout simple
- Can be run with a single cable
Disadvantages:
- Having a single point of failure
- High network traffic would decrease network performance
- Half-duplex
Ring Topology
- Computers are connected to each other in a circuit
- Every device in the network will have two neighbors and no more or no less
- The first node is connected to the last node to link the loop together
Dual Ring Topology
- Ring topologies that are configured to be bidirectional
- Dual ring topologies provide each node with two connections, one in each direction
Star Topology
- Every node in the network is connected to one central switch
- A point to point connection in which all the nodes are connected to each other through a central computer, switch or bridge, hub or repeater, or router or gateway
Tree Topology
- A structure that is shaped like a tree with its many branches
- Tree topologies have a root node that us connected to another node hierarchy
- The hierarchy is parent-child where there is inly one mutual connection between two connected nodes
- A combination of bus topology and star topology
Mesh Topology
- A point-to-point connection where nodes are interconnected.
Date is transmitted via two methods:
1. Routing
2. Flooding
There are two forms of mesh topology:
1. Partial mech topology
2. Full mesh topology
Partial Mesh Topology
- Most nodes are interconnected but there are a few which are only connected to two or three other nodes
- All other nodes are directly connected to each other but two or more nodes are connected to some nodes in the network
- The formula for calculating the number of connection: n(n - 1)/2
Full Mesh Topology
- Where every node is interconnected
- All the nodes in the network are directly connected to each other
- Each of the nodes behaves as a switch or router
- The formula for calculating the number of connections: n(n - 1)
Hybrid Topology
- A combination of two or more topologies
- Most common hybrid topologies include star-bus and star-ring network
