CCNA Network Models
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| List the 7 layers of the OSI model from highest to lowest. | show 🗑
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| show | This is where the end user interacts with the network. It ensures the remote communication is available and is responsible for agreeing on basic rules of communication such as data integrity, privacy, and presence or absence of error recovery features
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| show | Answers the question of “how will data be presented.” Data encryption happens at this layer. An example of a presentation layer issue would be opening a pdf in an a non-PDF-friendly app
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| Briefly describe the Session layer | show 🗑
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| Briefly describe the Transport layer | show 🗑
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| show | This is where routers do their job. They answer two basic questions:
- What valid paths exist from here to where we need to go – our destination?
- Of those valid paths, which is the best path to use to get there?
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| What is TCP? | show 🗑
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| What is UDP | show 🗑
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| Briefly describe the Data Link layer | show 🗑
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| What are 4 other names for MAC addresses? | show 🗑
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| Briefly describe the Physical layer | show 🗑
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| What layer of the OSI model deals with segments? | show 🗑
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| What layer of the OSI model deals with packets? | show 🗑
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| What layer of the OSI model deals with frames? | show 🗑
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| What layer of the OSI model deals with bits (ones and zeros)? | show 🗑
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| show | As data heads down the OSI model, each layer (except L1) adds a header that will be removed by the same layer at the other end of the session. Headers are layer-specific.
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| Which OSI layer attaches a Trailer in addition to a header? | show 🗑
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| show | A Protocol Data Unit is the combination of data and a layer-specific header. They are usually referred to by the layer number (L7 PD, L6 PDU, etc.)
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| What is the main difference between the OSI Model and the TCP/IP Model? | show 🗑
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| show | Open Systems Interconnection
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| show | Application L7
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| The FTP Protocol runs at which layer of the OSI Model? | show 🗑
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| show | Application L7
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| show | Session L5
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| show | Transport L4
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| The UDP Protocol runs at which layer of the OSI Model? | show 🗑
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| The IPv4 and IPv6 Protocol runs at which layer of the OSI Model? | show 🗑
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| show | Network L3
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| The ICMP Protocol runs at which layer of the OSI Model? | show 🗑
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| show | Data Link L2
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| show | Data Link L2
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| show | Physical L1
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