![]() The switch has a MAC address table where it stores learned MAC address. Switches must flood these frames on all ports part of that broadcast domain (VLAN). All devices in that broadcast domain will see that request but only PC B will reply to it. If PC A and PC B are on the same subnet and PC A does not know the MAC address of PC B then it needs to send an ARP request which is a broadcast at layer 2, meaning the destination MAC address is FF-FF-FF-FF-FF-FF. We have several layer 2 protocols but Ethernet is the most common one. The source IP is PC A and the destination is PC B. There used to be different routed protocols like IPX, Appletalk etc but today it's all IP so we need a source and a destination IP address. PC A browser would send HTTP commands like HTTP GET, these commands would be encapsulated in a TCP segment destined to TCP port 80 on PC B. Without complicating it too much, let's say that PC A is using a browser to go to a webpage that PC B is hosting. Think of the OSI model, you have seven layers consisting of: There are several steps involved in two hosts communicating.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |