===== Physical Layer =====
[[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]]

The **Physical Layer** is the first layer of the [[dido:public:ra:xapend:xapend.a_glossary:o:osi]]. The Physical Layer deals with bit-level transmission between different devices and supports electrical or mechanical [[dido:public:ra:xapend:xapend.a_glossary:i:interface|interfaces]] connecting to the physical medium for synchronized communication.

This layer plays with most of the network’s physical connections - wireless transmission, cabling, cabling standards and types, connectors and types, network interface cards, and more - as per network requirements. However, the physical layer does not deal with the actual physical medium (like copper, fiber).

Source: [[https://www.techopedia.com/definition/8866/physical-layer | Physical Layer ]]