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The Domain Name System does something wonderful and transparent for us: It takes the hostname we enter into a web browser – usually a website’s URL – and translate it into the IP address that’s actually needed to make the communication between host and website happen. A DNS Query is sent out asking for a […]
Before we head back to L3 and start work with routing protocols, let’s take a few minutes to go into more details about the going-on at the Transport Layer(OSI Layer4). TCP and UDP get the job done here, but they do so in wildly different styles. TCP: Guarantees delivery of segments. Performs error detection and […]
Auto negotiation Ports, Ports, Ports By default, Cisco Switch ports are set to automatically negotiate port speed and duplex with the connected partner. Basically the port and the connected device have a conversation about the highest level of speed and duplex each can support, and then come to an agreement about the speed and duplex […]
