Tugas Link Layer adalah memindahkan datagram dari satu node ke node berikutnya melalui indivual link dalam bentuk frame.
Layanan Link layer ada 6, yaitu :
1. Framming
2. Link Access
3. Reliable Delivery
4. Flow Control
5. Error Detection
6. Error Correction
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image002.jpg)
TCP memiliki mekanisme layer yang berbeda
Ethernet adalah teknologi yang dibuat dan dipatenkan perusahaan XEROX.
Kecepatan transmisi data di Ethernet adalah 10Mbps(Ethernet), 100Mbps(Fast Ethernet), dan 1Gbps(Gigabit Ethernet).
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image003.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image004.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image005.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image006.gif)
Data layer :
1. Bit
2. Frame
3. Paket
4. Segmen
Semua yang diatas merupakan protocol data unit.
Beda switch dan bridge hanya beda port.
- Switch memiliki lebih dari 2 port(multiple port)
- Bridge hanya memiliki 2 port
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image007.gif)
1. Transmit (+) H
2. Transmit (-) PH
3. Recieve (+) B
4. Not Used O
5. Not Used PO
6. Recieve (-) PB
7. Not Used C
8. Not Used PC
![Oval: PC](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image008.gif)
![Oval: PC](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image009.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image010.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image011.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image010.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image011.gif)
![Oval: HUB](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image012.gif)
![Oval: PC](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image013.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image014.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image015.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image016.gif)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image017.gif)
RC (+) TR (+)
RC (-) TR (-)
![](file:///C:/Users/Trace/AppData/Local/Temp/msohtmlclip1/01/clip_image018.gif)
Domain Name System (DNS) : mengelola nama-nama host berdasar alamat IP
DNS terdapat di application layer
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