Mesh : Topologi jaringan ini menerapkan hubungan antar sentral secara penuh. IBM Token Ring network stations are straight connected to MAUs, which can be wired with each other to type a single huge ring (as shown in Figure 6-2 ). Patch cables connect MAUs to adjacent MAUs. A third function for the AM is to guarantee that precisely one token circulates anytime there is no frame getting transmitted, and to detect a broken ring.
A token ring LAN is implemented either as a logical ring employing a physical ring topology (see Figure 9-1), or as a logical ring structure arranged in a physical star configuration (see Figure 9-two). In a token ring network, the initial pc to come on line creates a 3-byte information frame called a token.
Token Ring frames have two fields that control priority: the priority field and the reservation field. Token Rings are not commonly drawn as the above drawing indicates: a separate line involving every single node. Only stations with a priority equal to or higher than the priority value contained in a token can seize that token.
Token Ring utilizes a logical ring topology, which offers a lot more equal chance for every station to acquire access to the network than the broadcast approach used by Ethernet. Fault diagnosis is tricky, because fault detection may have to be performed from any point in the network.
If the workstation sees that it is the location for the message, it copies the message from the frame and alterations the token back to . When a node calls for access to the ring, the node claims the token and then passes its information and facts packet about the ring. If the priority of the token is higher than the frame to be transmitted, the token is passed on.