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Chapter 4: Bridges/Switches and LAN Design
Figure 4-2
10BaseT Half-Duplex Operation
The chronological steps illustrated in Figure 4-2 are as follows:
Step 1
The network interface card (NIC) sends a frame.
Step 2
The NIC loops the sent frame onto its receive pair.
Step 3
The hub receives the frame.
Step 4
The hub sends the frame across an internal bus so that all
other
NICs can receive the electrical signal.
Hub
NIC
NIC
Collision?
Receive
Transmit
Receive Pair
2-Pair Cable
Transmit Pair
Loop
back
NIC
NIC
5
4
4
3
1
2
5
5
ch04.fm Page 136 Monday, March 20, 2000 5:02 PM