CCNA Pre Study
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- In the DoD model, what OSI layers map to the application layer?
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Application
Presentation
Session - Name the Protocol Data Units and what OSI layer they are associate with.
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DATA: Layer 5,6,7 (App, presentation and session)
Segments: Layer 4 (Transport)
Packets: Layer 3 (Network)
Frames: Layer 2 (Data Link)
Bits: Layer 1 (Physical) - In the DoD model, what OSI layers map to the Internet layer?
- Network
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IN the CLI, what is a.....
(Config-Router)# - Router configuration mode
- What are the layers of the DoD Model?
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Application
Host to Host
Internet
Network - What are the services provided by the physical layer?
- Wire speed, pin layouts, voltage.
- In the DoD model, what OSI layers map to the Host to Host layer?
- Transport
- What services are performed by the session layer?
- NFS, SQL, RPC, Coordinating commmunication between systems.
- In the DoD model, what OSI layers map to the Network layer?
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Data Link
Physical -
In the CLI, what is a.........
(Config-SubIf)# - Sub interface Configuration mode
- What services are provided by the data link layer?
- Divided intio two sub payers: Media Access Control (MAC), logical link control (LLC), frmae relay, physical addressing.
- What devices reside at the Access layer in the CISCO 3 layer model?
- End point station entry points to the network. Switches and hobs reside at this layer.
- What devices reside at the Core layer in the CISCO 3 layer model?
- Awitches traffic to the appropriate service. High speed switches reside at this layer.
- What is the mnemonic for the OSI model?
- All People Seem To Need Data Processing
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In the CLI what is a.........
# - Privileged exex mode
- What devices reside at the distribution layer in the CISCO 3 layer model?
- Routing, flitering and WAN access. Routers reside at this layer.
- What Services are Performed by the Application Layer?
- Synchronizes applications and makes sure the resources are available. Telnet, FTP, WWW
- Name the 7 OSI Layers and its associate number
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Application 7
Presentation 6
Session 5
Transport 4
Network 3
Data Link 2
Physical 1 - What layer protocols reside at the network layer?
- IP, IPX, ICMP, ARP, IGMP
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In the CLI,what is a.........
(Config-Line)# - Line configuration mode
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In CLI, what is:
(Config-If)# - Interface configuration mode
- Name the 3 layers of the CISCO Model
- Core, Distribution and Access
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In the CLI what is a....
> - User exec mode
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In the CLI, what is:
(Config)# - Global configuration mode
- What services are performed by the transport layer?
- Flow control, windowing, acknowledgements, virtual circuits, port numbers.
- Wht Services Are Performed By the Presentation Layer?
- PICT, JPEG, GIF, DOC, MIDI, MPEG, ASCII, Syntax, Formatting, Compression, Encryption
- What services are provided by the network layer?
- Logical network addresses, routing.