Token Ring

1
Token Ring

• Logical Ring Topology IEE 802.5
• Packet passing 1 direction
• No collisions
• Token space available
• Packet space taken
• Message Received code
• Sender removes packet, replaces token
• Deterministic
• Speed 4 Mbps, 16 Mbps (NOT comparable to Ethernet)

2
Multistation Access Unit

• Physical Star
• Ring inside the MAU
• STP up to 260 nodes, 100 meters
• UTP up to 72 nodes, 45 meters
• Extending the ring
• Ring in port
• Ring out port