Star topology:- In this topology all PC are connected with the central device. Central may be HUB and SWITCH. Star widely use in all over word. Ring topology:- In this ring topology all PC are connected in the frame of ring are close Ring topology use MSAU each PC has a two never road one is called up Stream and called down stream. It used token passing Matterhorn which implement the token ring network. " Is the best of star topology".
SONET use RING physical topology and TOKEN logical topology. As simple as that. Logical topology deals with the data transmission. Physical topology deals with how the network is connected physically , BUS, RING, STAR and the like.
Token Ring
3. Unlike Ethernet, Token Ring uses a ring topology whereby the data is sent from one machine to the next and so on around the ring until it ends up back where it started. It also uses a token passing protocol which means that a machine can only use the network when it has control of the Token, this ensures that there are no collisions because only one machine can use the network at any given time.
Both Token Ring and FDDI use the concept of a ring topology structure. However, Token Ring is used in a LAN, and FDDI is used in a MAN.Token Ring is implemented with copper cable (UTP cable) and FDDI uses Fiber Optic cable.Finally, the protocols are very different between the two. FDDI uses a synchronous type of transmission, where Token Ring uses an actual token (a 3 character packet) to control who has access to transmit or receive on the network. FDDI does not use this technique.
A Local Area Network (LAN) may use many different types of topologies (how the network is physically wired). If one uses a ring topology, then a special type of managed hub is usually used which implements packet switching in a round, ring structure, in which each station is visited by the packet in linear sequence. Ring topologies also involve the use of a 'token', which describes whether a station on the ring may use the network or not. Ring topology can be considered as a LAN and it is rarely used nowadays.
ring/hybrid
token ring uses a physical star and a logical ring ,while FDDI uses a physical star/ring and a logical ring.
The token indicates current "ownership" of the ring, in that only one client at a time can have access to the network. If you don't have the token you can't do anything on the network. It also indicates the status of the ring, whether it is in use, available to transmit on, health status, etc.
The token is a special 3 byte sequence that indicates the state of the ring; it may mark the ring as in-use, or free (anyone can use it), or health status. Any client needs to have access to the token before transmitting or receiving on the ring network.
yes, network topology does matter to design a network. as we know that topology is a structure of network. without a topology network cannot be designed. we have to consider which topology to use and what does each topology does. different topology have its different features. if you want most secure connection use full mesh topology
Bus Topology