Home » Cisco » 100-101 » How does a switch differ from a hub?
How does a switch differ from a hub?
A. A switch does not induce any latency into the frame transfer time.
B. A switch tracks MAC addresses of directly-connected devices.
C. A switch operates at a lower, more efficient layer of the OSI model.
D. A switch decreases the number of broadcast domains.
E. A switch decreases the number of collision domains.
Correct Answer: B
Explanation/Reference:
Explanation:
Some of the features and functions of a switch include:
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.
For a detailed description of how switches operate, and their key differences to hubs, see the reference link below.
Reference: http://www.cisco.com/warp/public/473/lan-switch-cisco.shtml
FULL Printable PDF and Software. VALID exam to help you pass.
|
|