Networking-Notes

Do you know that if a computer has a default gateway on different subnet than the IP address will still work?? If not read the below. If yes again read the below. It’s just 5 minutes and a great experience 😊     As I am almost done from the review of the CWAP and almost ready for the exam (at least that’s what I believe), I will share my experience I had today. Due to today’s workload (around 10h troubleshooting/configuration/design) I am tired to focus on wireless and I am here to write this post. One of my colleagues called me and told me: I see one computer that the gateway is on different subnet with the ip address. He sent me a screenshot. See below.   To be fair I never faced this before. The scenario was: My colleague removed the old router and added the new one (migrating to a new network that we don’t need to know the old router. Only the old data subnet and we are seeing them from the PCs most of the times) I told him to connect via console on ...

  802.11 Control Frames   Control frames are controlling the access to the medium They have type value of 01. The subtype value defines the function of the frame. Below you can find where the Type and Subtype can be found in a frame. Example   The subtype and associated values Also, you can find the wireshark filter for every type   All Control Frames                                                         wlan.fc.type == 1   Subtype: 0000 – 0110     Reserved Subtype: 0111 – Control Wrapper                                   wlan.fc.type == 1 and wlan.fc.subtype == 7 Subtype: 1...

Wireless management frames  Management frames have type value of 00 and are used to manage the BSS. There are in total 16 frames but the 2 are reserved values.  The subtype value defines the function of the frame Below you can find where the Type and Subtype can be found in a frame. Example  The subtypes and associated values. Also you can find the wireshark filter for every type.  All Management Frames                                           wlan.fc.type == 0 Subtype: 0000 -  Association Request                    wlan.fc.type_subtype == 0 Subtype: 0001 -  Association Response                   wlan.fc.type_subtype == 1 Subtype: 0010 -  Reassociation Request                wlan.fc.type_subtype == 2 Subtype: ...