1 networking devices part-1 faheem anwar ptcl academy
TRANSCRIPT
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NETWORKING DEVICESPART-1
FAHEEM ANWARPTCL ACADEMY
2
COMMON NETWORKING DEVICES
1- REPEATER
2- HUB
3- BRIDGE
4- SWITCH
5- ROUTER
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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)
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
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 device Sending device
AS
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COLLISIONS IN HUB
Sending Device
Receiving Devices
COLLSSION
A B C D E F G
H I J K L M
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COLLISION DOMAIN
Hub-3 Hub-4 Hub-5 Hub-6 Hub-7 Hub-8
Hub-1 Hub-2
router Single Collision Domain
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What would be the duplex settings?
Hub-3 Hub-4 Hub-5 Hub--6 Hub-7 Hub-8
Hub-1 Hub-2
routerHalf-duplex
ETHERNET PORT
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BRIDGE
BRIDGE Layer-2 Device
Usually 2-4 ports
Uses MAC address
Divides collision domain
ApplicationHUB-2HUB-4
HUB-3
HUB-1
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 D7MAC PORT
B1 2
B2 2
D4 4
C3 3
A7 1
D6 4
B6 2
BRIDGE OPERATION
CASE-1B6 communicates with B5
MAC TABLE
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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 D7MAC PORT
B1 2
B2 2
D4 4
C3 3
A7 1
D6 4
B6 2
CASE-2B6 communicates with B2
MAC TABLE
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 D7MAC PORT
B1 2
B2 2
D4 4
C3 3
A7 1
D6 4
B6 2
CASE-3B6 communicates with A6
MAC TABLE
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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 D7MAC PORT
B1 2
B2 2
D4 4
C3 3
A7 1
D6 4
B6 2
CASE-4B6 communicates with C3
MAC TABLE