Lesson 3 Flashcards
greek word for topology
topos
what does topos mean
place
this refers to the arrangement of elements of communication network
topology
either the physical or logical structure of a network
topology
network topology is also called as
network’s basic design
schematic description of the arrangement of network elements
network topology
arrangement or physical layout of the computers, cables and other components in the network
physical topology
path that signals actually take around the network; flow of data through the network
logical topology
often referred to as linear bus because all nodes are connected in a straight line
bus topologya
all devices are connected to a central cable called the bus, trunk, or backbone
bus topology
this is a component attached to each end of the cable to absorb free signals
terminator
all network devices are connected into a single concentrating device called hub (indirect connections)
star topology
all computers are connected to one another in a closed loop; the message flows in one direction only
ring topology
the computer next to the source acts as a repeater (a device that boosts signal to travel further along the cable) and retransmits the signal to the next computer until the message reaches the computer with the exact destination address
ring topology
true or false: no need for terminators in ring topology because there is no end to the ring
true
what method is used by ring topology
token passing
this is a special series of bits that is generated and is passed along the network until a computer that has a need to transmit data makes use of the token
token
this requires complex, redundant links between each device in the network; can be full or partial
mesh topology
has direct connection to all other devices in the network
full mesh topology
has direct connection to other devices but not all
partial mesh topology
formula for the total number of paths in a full mesh network
N = n(n-1)/2
combines the characteristics of both the star and bus topologies
tree topology/star-bus topology
uses several star topology networks connected through a single backbone
tree topology/star-bus topology
may also be called star wired ring
star-ring topology
combines multiple different topologies and the resulting topology doesn’t fall into basic topology definitions
hybrid topology
combined characteristics of the topologies you are to connect
hybrid topology
disadvantage: if the main cable breaks the entire network goes down
bus
advantage: network expansion is easy
disadvantage: if the hub breaks down, the entire network goes down
star
advantage: no danger of collision because only one packet of data can travel along the ring
ring
advantage: immune to bottlenecks; redundant paths are available
mesh
