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12
votes
2answers
1k views

Maximum Length of Ethernet over CAT5

As part of my course I’ve been reading the paper Ethernet: Distributed Packet Switching for Local Computer Networks. I understand that “classic” Ethernet (over coaxial cable) has a maximum length of ...
0
votes
0answers
15 views

Backup folders, file conflicts

Planning folder backups (to augment current drive image backup). Looking at SyncBack. Looking at the situation when already file exists in the target. a) if files "the same", nothing done - good. b) ...
2
votes
1answer
2k views

Collisions in CSMA/CD Ethernet

I am confused about collisions in CSMA/CD Ethernet. When would a jam signal be sent? Why are jam signals sent? If two simultaneous packet transmissions interfere with each other, the two transmitting ...
1
vote
1answer
1k views

how does a NIC actually detect a collision when using CSMA/CD?

I understand that a network card detects collisions because their signal has a higher amplitude than normal signals. But why is that signal of higher amplitude? For example, say we have the simplest ...