All Questions
155
questions
0
votes
2
answers
104
views
Would it theoretically be possible in an Ethernet Network connected through a hub for many devices to send data AT THE SAME using multiplexing?
I am curious to know if in an Ethernet network the techniques used in LTE or other High Speed wireless Network that allow different devices to send data at the same time can still be used.
For ...
- 1,541
1
vote
1
answer
91
views
In CSMA/CD what does Carrier Sensing stands for? What does it mean?
For someone who does not speak English as a native language some acronyms can be really confusing and I would like to make sure that I understand how were this acronyms formed and what was the initial ...
- 1,541
4
votes
2
answers
5k
views
Is the CSMA/CD protocol active in modern ethernet networks that use LAN switches? If it is active, does it ever detects a collision?
I am interested to know if the CSMA/CD protocol is still active in modern Networks and if it is active why and what is his role now?
- 1,541
22
votes
4
answers
19k
views
Why is the CAM table in a switch called CAM table and not MAC table even though it holds MAC addresses?
I know the CAM table in a switch holds MAC addresses and the ports that are associated with the respective MAC addresses. There are no such thing as CAM addresses from my knowledge, so why is it ...
- 1,541
1
vote
1
answer
106
views
Determining the identity of a connected device
I apologize in advance if my questions is too simplistic as i am no expert in networking. I am working on a project and i need to know if it is possible to dynamically determine the type of device ...
- 33
1
vote
1
answer
755
views
Full Duplex and Half Duplex Channel Capacity
As far as I know about full and half duplex, if we have a channel with bandwidth 10Mbps then in full duplex both sender and receiver can transfer 10Mb in both directions at the same time and in half ...
- 441
1
vote
2
answers
182
views
How does equipment know it has devices connected to it?
I was wondering how Ethernet equipment (for example a switch) knows that something have been plugged in and is up ?
Is there a pair of copper wire dedicated for that ? Or a bit exchange ? On which ...
2
votes
2
answers
12k
views
Show RAM usage Cisco 2960
I'm trying to see how much RAM is being used by each switch.
The switch is a cisco WS-C2960-24TT-L IOS version 12.2.
This is what I am seeing from the switch when I run the show version command.
...
- 23
16
votes
3
answers
5k
views
Why would a switch be connected to a router using three ethernet cables?
In our rented office, we have a router (BT smart hub) connected to a large switch (model unknown). The two are connected using three ethernet cables, thus:
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| 1 2 3 4 ...
- 273
3
votes
1
answer
2k
views
Do typical Ethernet switches have timeout for MAC table entries?
Ethernet switches have a learning process through which they gradually begin to understand the network topology -- which MAC address is behind which port. When seeing a port to send a frame with a ...
- 465
1
vote
1
answer
839
views
Where to plug the Firewall into the SFP or a normal port?
I have a Cisco SG220 and a ZyXel USG20 firewall appliance. I'm new to the SG220 and SFP ports in general. Where is the optimal place to plug in the Firewall to the Switch. Normally I would just plug ...
- 113
2
votes
2
answers
496
views
Understanding VLAN tagging
Let's say we have 4 machines connected to a layer 2, managed switch which is connected to a layer 3 switch. Say that 1.2.3.0/24 is routed to the layer 3 switch. Our goal is to have 1.2.3.0-63 usable ...
- 123
6
votes
1
answer
1k
views
What should a device do with an Ethernet frame larger than its MTU?
When I test with Cisco 2960 series switches or with ISR routers, then if port receives an Ethernet frame larger than its MTU value seen in sh int output, then device drops this frame and increases the ...
- 1,109
2
votes
1
answer
601
views
Cisco 6500 Port Lights
I was wondering if anyone knows if there is a way to change how to port lights function on a 6500 switch.
Most switches work like this...
No Light - Port in shutdown or no connection
Solid Orange - ...
- 123
2
votes
2
answers
58
views
Is it possible to design a network switch that could work only with combinational or sequential logic circuits without a software?
And if it is possible are there any companies that are building these type of switches ? Are they/would they be much more expensive than a regular switch which has a more 'standard' processor and is ...
- 1,541