GATE Overflow Test Series | Computer Networks | Test 1 | Question: 30

Question

Which of the following is/are true about Ethernet networks? (Mark all the appropriate choices)

• A. Ethernet frames are usually larger than the minimum required size of 64 bytes to ensure good utilization of the network.
• B. A bridge will forward a broadcast but a switch will not.
• C. Hosts on different segments of a switched Ethernet network will only see packets to hosts on their segments or to the broadcast address.
• D. When an Ethernet sender detects that the media is idle, it sends a jam signal onto the media to tell other devices not to transmit, and then it sends its packet.

Answer 1

Ethernet frames have a minimum size of 64 bytes to detect collision (traditionally and still being used for backward cmpatibility). But frame sizes are often larger than this to ensure better utilization. (i.e., senders could otherwise have a large overhead to send a small piece of data).
 
Both bridges and switches will forward broadcast and multicast traffic, assuming that the traffic remains in the same VLAN.
 
Reference: https://www.globalknowledge.com/us-en/resources/resource-library/articles/what-s-the-difference-between-hubs-switches-bridges

Comments

That is correct. I have made the sentence clear now.

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Yes Now sentence is more correct.

Thanks.

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@Sachin Mittal 1 @gatecse @GO Classes
“Hosts on different segments of a switched Ethernet network will only see packets to hosts on their segments or to the broadcast address.”
 

A host of on segment can see packets to host of other segment right?
if A, B are in one segment and C, D are in another segment, 
A sends a frame to C, B will see it!. so this option should be false.

please confirm! or my reasoning is wrong?