Section 2 OSI Reference Model / EXAM/ QUESTIONS / 100% VERIFIED ANSWERS

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Computer network - ANS -connects two or more devices together to share information and services Internetwork - ANS -Multiple networks connected together Network reference model - ANS -serves as ... a blueprint, detailing how communication between network devices should occur. The two most recognized network reference models are: - ANS -•The Open Systems Interconnection (OSI) model •The Department of Defense (DoD) model Why do networks have layers? - ANS -Each layer represents a specific networking function.These functions are controlled by protocols, which are rules that govern end-to-end communication between devices. What is the most prevalent protocol suite? - ANS -TCP/IP suite is the most prevalent protocol suite, and is the foundation of the Internet. Who was the OSI model developed by and why? - ANS -International Organization for Standardization (ISO), and formalized in 1984. It provided the first framework governing how information should be sent across a network. What are the seven layers of the OSI model? - ANS -7 Application All 6 Presentation People 5 Session Seem 4 Transport To 3 Network Need 2 Data-link Data 1 Physical Processing What Layers of the OSI model are often refered to as the upper layers? - ANS -The top three layers of the OSI model are often referred to as the upper layers: •Layer-7 - Application layer •Layer-6 - Presentation layer •Layer-5 - Session layer Protocols that operate at the upper layers are for? - ANS -Protocols that operate at these layers manage application-level functions, and are generally implemented in software. [Show More]

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