Category Archives: Ethernet

History: On May 22, 1973, while working at the Xerox Palo Alto Research Center (PARC) in California, Bob Metcalfe wrote a memo describing the network system he had invented for interconnecting advanced computer workstations called Xerox Altos. The era of open computer communications based on Ethernet technology formally began in 1980 when the Digital EquipmentContinue reading “Ethernet”

10.0.1.0/24 PC-A, Switch-A, and Router-A  10.0.2.0/24 Router-A, Hub-A, and Router-B   10.0.3.0/24 Router-B, Switch-B, and PC-B Goal : How PC-A acquires its IP addressing information using DHCP, how DNS works to resolve names, how PC-A and PC-B use TCP to perform telnet, how the three-way handshake occurs, how the switches switch frames, and how the routersContinue reading “Complete End-End connection Establishment”

Short introduction to TCP protocol The TCP protocol is used by a large majority of client/server applications like the millions of Internet Web servers. TCP stands for Transmission Control Protocol and works on the transport network IP (Internet Protocol). TCP is used to exchange data reliably through mechanisms of sequence and acknowledgment, error detection, errorContinue reading “Establishment of a TCP connection, state diagram”

A VLAN is a group of devices in the same broadcast domain or subnet. VLANs are good at logically separating/segmenting traffic between different groups of users. VLANs contain/isolate broadcast traffic, where you need a router to move traffic between VLANs. VLANs create separate broadcast domains: they increase the number of broadcast domains, but decrease theContinue reading “Vlan”