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Answer Posted / nathan
Generally, a bridge has only two ports and divides a
collision domain into two parts. All decisions made by a
bridge are based on MAC or Layer 2 addressing and do not
affect the logical or Layer 3 addressing. Thus, a bridge
will divide a collision domain but has no effect on a
logical or broadcast domain. No matter how many bridges are
in a network, unless there is a device such as a router
that works on Layer 3 addressing, the entire network will
share the same logical broadcast address space. A bridge
will create more collision domains but will not add
broadcast domains
A switch is essentially a fast, multi-port bridge, which
can contain dozens of ports. Rather than creating two
collision domains, each port creates its own collision
domain. In a network of twenty nodes, twenty collision
domains exist if each node is plugged into its own switch
port. If an uplink port is included, one switch creates
twenty-one single-node collision domains. A switch
dynamically builds and maintains a Content-Addressable
Memory (CAM) table, holding all of the necessary MAC
information for each port
| Is This Answer Correct ? | 31 Yes | 8 No |
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