4. Network Administrator,…
Advantages Disadvantages
Good salary ERROR, then people
Control other peoples want to kill YOU !!!
Faster than others
Relax
Computer Network – Sritrusta Sukaridhoto
6. Study…
Network Skill
Operating system
Server – Client
Router, Switch, Cabling, etc (network devices)
Hacking not Cracking
Certificate
Experience
Time can answer ???
Computer Network – Sritrusta Sukaridhoto
7. Open System Interconnection
(OSI)
A model defines the stages or
tasks of a protocol as it
prepares to send data
Open meaning standards
available to all.
The model is devided into
seven distinct layers
Each subsequent layer should
perform a well-defined function
and the layer boundaries are
designed to minimize the
information flow across the
interfaces
Computer Network – Sritrusta Sukaridhoto
8. OSI Model Layers
Application Layer
Provides a user interface (examples: HTTP, SMTP)
Includes file, print, database, app. Services
Presentation Layer
Presents the data (example: JPEG)
Includes encryption, compression and translation
services
Session Layer
Keeps different applications data separate
Computer Network – Sritrusta Sukaridhoto
9. OSI Model Layers
Transport Layer
Provides reliable delivery
Performs error detection
Includes end to end connection
Network Layer
Provides logical addressing
Routing layer
Computer Network – Sritrusta Sukaridhoto
10. OSI Model Layers
Data Link Layer
Combines packets into bytes then into frames
Performs error detection (not correction)
Provides Media access addressing (point-to-
point)
Media Access Control and Data Link Control
Physical Layer
Moves bits between devices
Computer Network – Sritrusta Sukaridhoto
11. Keys Layers of the OSI Model
Computer Network – Sritrusta Sukaridhoto
12. OSI Model and Protocols
Computer Network – Sritrusta Sukaridhoto