There are two categories of Transmission media:
- Guided transmission media.
- Unguided transmission media.
Guided Transmission media: It is also known as connection-oriented transmission. It follows a path or direction. It uses wire for transmission. It is safe and secure. It is expensive. It suited for point-to-point networking. It passes electronic voltage or current. Eg: – Twisted pair cable, Co-axial Cable, Fibber optic cable.
Advantages of Guided transmission media:
- It allows to specify the direction of data transmission flow and also specifies protocols for error control.
- Using it we can send or receive all transmission packets in sequence.
- It specifies a small size packet.
- It can only transmit a packet address.
Disadvantages of Guided transmission media:
- Once the connection is established, we can’t change its direction.
- Connection-oriented protocol sometimes generates congestion.
- It specifies acknowledge with each packet. So, it consumes extra memory space and works slowly.
Unguided transmission media: It is also known as connectionless transmission. It doesn’t follow a path or direction. It provides a signal in the air. It provides un-authorized transmission. It is less expensive. It provides a broadcast network. It uses electromagnetic wire. Eg: – Satellite, Lightwave, Microwave, etc.
Advantages of Unguided transmission:
- It is fast.
- It is cheap.
- It performs transmission with various roots at a time.
- It uses maximum efficiency.
Disadvantages of Unguided transmission media:
- It is not reliable.
- It allows for sharing a common physical IP address. So, it’s responsible for all connected clients.
- It sends an acknowledgment for each client.
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