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Q. Explain physical layer of Osi reference model?
- The physical layer deals among the physical characteristics of the transmission medium.
- It defines the mechanical, electrical, procedural and functional specifications for maintaining, activating and deactivating the physical link between end systems.
- Such characteristics like timing of voltage changes, voltage levels, physical data rates, maximum transmission distances, physical connectors and other similar attributes are defined by physical layer specifications.
- Instances RJ45, EIA/TIA-232 and NRZ
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What is a Link? A link refers to the connectivity among two devices. It contains the type of cables and protocols used in order for single device to be able to communicate with
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Describe packet filtering firewall?
Station Types No-transition mobility moreover stationary or moving only inside a BSS BSS-transition mobility is able to move from one BSS to another, but confined inside one
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discuss the communication model from the source to the destination including the detailed account of the task that must be performed in data communication system
Explain BGP
Local information is immediate hop routing table and distance from every switch. The switches regularly broadcast topology information i.e. distance, destination. Other switches mo
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