شرح رائع جدااا لى ccna مش شركة yat المعروفه

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بسم الله الرحمن الرحيم
السلام عليكم ورحمة الله وبركة
شرح رائع جدااا لى ccna مش شركة yat المعروفه

مثل على المحتوى الموجود فى ملف الورد
Network topology
N (N - 1)

2

* Bus. * Star.
*Ring. * Mesh: no. of cables =
Unicast: means send data for one of all receivers.
Multicast: means send data for some receivers of all.
Broadcast: means send data for all receivers.
Techniques of LAN (Local Area Network):
1- Ethernet.
2- Taken Ring.
Techniques of WAN (Wide Area Network):
1- FR. (Frame Relay) 2- DSL 3- ATM 4- ISDN …
Transmission types:
1) Single: transmission in one direction only.
2) Half duplex: transmission in the two directions but not at the same time.
3) Full duplex: transmission in the two directions at the same time.
(ISO), (ORGANIZATION)
OSI Model:
- *******s of 7 layers. ** The Layers
7- Application layer:
- It provide user interface (the person who is act with the network).
- Protocol: HTTP, IMAP, POP, SNMP, TELNET…
6- Presentation layer:
- Define how information is represented to the user.
- Put extension for the data.
5- Session layer:
Makes establish Maintaining and terminating the connection across the network.
4- Transport layer:
- Divide the row of data stream into segment.
- Manage flow control of data through windowing, Acknowledgment and error Recovery.
Ex. TCP, UDP.
- Remember as reliability.

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