All Questions
10
questions
3
votes
2
answers
455
views
Is there an equivalent of the Cisco/ Cisco esque command "ip helper-address a.b.c.d" on Mellanox switches?
Apologies for my newbie question. I have recently had a Mellanox switch added to the mix. I was using an "IP helper-address" to forward DHCP requests in different VLANs to my DHCP server(s) ...
- 33
2
votes
1
answer
140
views
If one of hub is damaged,will it cause others hub damage too?why can't i enable the rapid dual homing
There is a multi-ring topology, combined with 8 Hubs and 2 switches, i want to ask two questions
1. If H3 is damaged,but the fiber is still ok, will H2 damage too in the future? i have thinking to ...
- 91
0
votes
0
answers
22
views
What is preamble in ethernet frame and why is it used? [duplicate]
I've searched all over the internet and every say that it synchronize the receiver clocks. What does that mean?
Also I've seen another definition that preamble gives NIC time to realize a frame is ...
- 107
3
votes
2
answers
932
views
Why the network switch drop the frame acording to ethertype/length?
I have a network switch IC , and I am using to the send BPDU packet. I can send packet with 2 byte ethertype/length field like this : 81 00, 80 00, 91 00 and some special hex number. But if I try to ...
- 133
1
vote
1
answer
58
views
IP/Device Question
I am very new to this field and I want to ask a quick question about IP/Device HTTPS.
When we type in the IP address of the device (cisco switch, router, firewall, etc), we can access to the web ...
- 13
7
votes
3
answers
6k
views
Is there any reason to use a hub over a switch?
Given that hubs are essentially the same as switches, as far as I know, except they share bandwidth between all connected devices, while switches do not, resulting in faster connections. I am simply ...
1
vote
2
answers
2k
views
Collision domain in full duplex mode switch
In my understanding switch can operate in half duplex or in full duplex mode.
In half-duplex mode only one wire pair is used, but in full duplex mode two wire pairs are used.
In half duplex mode ...
- 147
2
votes
4
answers
6k
views
Clarification about CSMA/CD and Switch Ethernet
I'm studying the difference between Hub and Switches.
The first ones are dummy devices who simply repeat the input signal to every output port. The anti-collision protocol CSMA/CD is implemented by ...
- 175
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
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