NETWORK TOPOLOGY

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WHAT IS NETWORK TOPOLOGY?

NETWORK TOPOLOGY
A network topology is refers to a layout of the computer and devices in a communications networks.

DIFFERENT BETWEEN STAR, BUS & RING TOPOLOGY

CRITERIA	STAR TOPOLOGY	BUS TOPOLOGY	RING TOPOLOGY
Definition	All the computers and other devices on network connect to a central device, thus forming a star.	A bus network consists of a single central cable (backbone), to which all computers and other devices connect.	On a ring network, a cable forms a closed loop (ring) with all computers and devices arranged along the ring.
Host failure	Network will fail	Network can still run	Network will fail
Easy of troubleshooting	Depends on the host. It is casier to repair the problematic host. However, if the nodes fail, then each node has to be searched.	Difficult. Need to search for the problematic node one by one.	Depends on backbone. If there is a backbone, troubleshooting is difficult. If there is no backbone, the focus is on the two nodes not communicating.
Host existence	Yes	Depends on network needs.	Depends on network needs.

DIFFERENTIATE BETWEEN LAN, MAN & WAN

CRITERIA	LAN	MAN	WAN
Cost	less costly setup and maintenance	more costly setup and maintenance	costliest setup and maintenance
Network size	small size (in a building)	large size (in a cities or campus)	largest size (different states or countries)
Speed	fastest in data transferring and access time	slower in data transferring and access time	slowest in data transferring and access time
Communication on devices	connected using modems, hub, switch,router	connected using medoms, hub, switch, router	the connected is made via satellite communication link or via internet
Network ownership	private (owned controlled and manage by a single person or organization)	private (owned and operated by a single entity such as a government or large corporation)	not owned up any one organization but exist under collective or distributed ownership