Features of the physical layer
Write down some of the features of the physical layer in detail?
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The features of the physical layer are as described below:
a) Physical features of interfaces and media: The physical layer states the features of the interface among the devices and transmission medium.
b) Representation of bits: To transmit the stream of bits, it should be encoded to signals. The physical layer states the kind of encoding.
c) Data Rate or Transmission rate: The number of bits sent each second is as well stated by the physical layer.
d) Synchronization of bits: The sender and receiver should be synchronized at bit level. Their clocks should be synchronized.
e) Line Configuration: In a point-to-point configuration, two devices are joined altogether via a dedicated link. In multipoint configuration, a link is shared among various devices.
f) Physical Topology: The physical topology states how devices are joined to make a network. Devices can be joined by using a mesh, bus, star or ring topology.
g) Transmission Mode: The physical layer as well states the direction of transmission among two devices: simplex, half-duplex and full-duplex.
Subnet mask: A Subnet Mask is an address mask which permits, systems to distinguish between the Network ID from that of the Host Ids in an IP Address. It is symbolized very much as how an IP address is symbolized.
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