CSMA/CD (Collision Detection) CSMA/CD: carrier sensing, deferral as in csma ace o Collisions detected within short time e Colliding transmissions aborted reducing channel wastage Collision detection o Easy in wired LaNs: measure signal strengths, compare transmitted, collision detect/abort received signalS time e Difficult in wireless lans: receiver shut off while transmitting 5: DatCSMA/CD (Collision Detection) CSMA/CD: carrier sensing, deferral as in CSMA  Collisions detected within short time  Colliding transmissions aborted, reducing channel wastage  Collision detection:  Easy in wired LANs: measure signal strengths, compare transmitted, received signals  Difficult in wireless LANs: receiver shut off while transmitting 5: DataLink Layer 5-22