Forum Replies

1. Hi Rene,

   I learned from http://www.netcontractor.pl/blog/?p=184 that control traffic from Layer 2 protocols like ( DTP, VTP , CDP , PAgP , STP, etc ) use VLAN 1.

   And I make sure of that by doing this experience :

   - I made a simple topology of connection two switches and making connectivity as trunk.
   - I made one switch VTP server and another as VTP client.
   - I also setup RSPAN to monitor the packets.
   - Results, I saw VTP, CDP traffic marked with VLAN ID 1.
   - Then, I made another vlan and disallowed Vlan 1 in the trunk.
   - Results still the same.
   - I thought it

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2. Hi Daniel,

   There’s a “technical” and “practical” aspect to this question

   Let’s start with the technical part…a lot of networking people will tell you that you shouldn’t have > 200 hosts in a subnet since there will be too much broadcast traffic and it will slow down your network. This might be true 10 years ago but nowadays, your computers won’t be bothered much with broadcast traffic and it shouldn’t be an issue for your switches. You could probably put ~1000 hosts in a single subnet and not notice any performance issues.

   The more important issue (the practic

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3. Hi I think I may have gotten a bad prep exam question as I cannot get it to work in labs and it does not make sense fully to me from how I learned VLANS. I will upload the practice test question from Boson and would like input please.

   //cdn-forum.networklessons.com/uploads/default/original/1X/05b2d7038e648c45e08123c84caf728638301b4b.JPG

   above is what they say is the answer and the topology its very brief. and below is their explanation.

   //cdn-forum.networklessons.com/uploads/default/original/1X/6cb467368403ad27ae72143183da8d340c120a6b.JPG

   Now I tried this i

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4. Hello Justin

   Let’s say a switch has 24 access ports where ports 1-12 are on VLAN 10 and ports 13-24 are on VLAN 20. Let’s say a broadcast frame is sent on port 1. The switch will receive that frame and send it out of ports 2 to 12. Why? Because it knows that it entered port 1, therefore it is on VLAN 10, therefore it will send it out of all ports that have been configured on VLAN 10. It doesn’t even look at the details of the frame itself, because there is no data in the frame that gives the switch VLAN information. The information comes only from the fac

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5. Laz,

   All of your posts are extremely well written. Thank you for explaining things much simpler than I can Thanks,
   Scott