2. 1 NETWORKING DEVICES PART-1 FAHEEM ANWAR PTCL ACADEMY

3. 2 COMMON NETWORKING DEVICES 1- REPEATER 2- HUB 3- BRIDGE 4- SWITCH 5- ROUTER

4. 3 REPEATER  Repeater is Layer 1 device  They do NOT look at: - Layer 2, Data Link (MAC, Ethernet) addresses - Layer 3, IP Addresses  Repeater Re-time Regenerate Amplify a signal  Half Duplex Signal come in … signal go out. (after I amplify it)

5. 4 REPEATER OPERATTION 1 0 1 0 1 0 0 1 1 0 1 BIT TIME Original Signal Attenuated Signal with Expanded bit time IN OUT

6. 5 HUB  A multiport repeater.  Layer 1 devices.  Broadcasts data  Half-duplex.  One device can transmit at a time  10 /100Mbps ports are the most common.  The hub acts the same as a “bus”.  Hub Operation Receiving deviceSending device A S

7. 6 COLLISIONS IN HUB Sending Device Receiving Devices COLLSSION A B C D E F G H I J K L M

8. 7 COLLISION DOMAIN Hub-3Hub-4Hub-5Hub-6Hub-7Hub-8 Hub-1Hub-2 router Single Collision Domain

9. 8 What would be the duplex settings? Hub-3Hub-4Hub-5Hub--6Hub-7Hub-8 Hub-1Hub-2 router Half-duplex ETHERNET PORT

10. 9 BRIDGE  Layer-2 Device  Usually 2-4 ports  Uses MAC address  Divides collision domain  Application HUB-2HUB-4 HUB-3 HUB-1

11. 10 A1 A2 A3 A4 A5 A6 A7 G B1 B2 B3 B4 B5 B6 B7 1 2 3 4 C1 C2 C3 C4 C5 C6 C7 D1 D2 D3 D4 D5 D6 D7 MACPORT B12 B22 D44 C33 A71 D64 B62 BRIDGE OPERATION CASE-1 B6 communicates with B5 MAC TABLE

12. 11 A1 A2 A3 A4 A5 A6 A7 G B1 B2 B3 B4 B5 B6 B7 1 2 3 4 C1 C2 C3 C4 C5 C6 C7 D1 D2 D3 D4 D5 D6 D7 MACPORT B12 B22 D44 C33 A71 D64 B62 CASE-2 B6 communicates with B2 MAC TABLE

13. 12 BRIDGE OPERATION A1 A2 A3 A4 A5 A6 A7 G B1 B2 B3 B4 B5 B6 B7 1 2 3 4 C1 C2 C3 C4 C5 C6 C7 D1 D2 D3 D4 D5 D6 D7 MACPORT B12 B22 D44 C33 A71 D64 B62 CASE-3 B6 communicates with A6 MAC TABLE

14. 13 BRIDGE OPERATION A1 A2 A3 A4 A5 A6 A7 G B1 B2 B3 B4 B5 B6 B7 1 2 3 4 C1 C2 C3 C4 C5 C6 C7 D1 D2 D3 D4 D5 D6 D7 MACPORT B12 B22 D44 C33 A71 D64 B62 CASE-4 B6 communicates with C3 MAC TABLE