Chapter 5 – 6 blog

Chapter 5 Blog

Vint Cerf, a well-dressed and well educated man with slight hearing loss, took a job at IBM after college. Cerf was very interested in computers particularly with the networking of computers. Roberts decided to make the Network Measurement Center responsible for testing and studying the networks performance. UCLA computer scientists were working on programming with the Sigma-7, an unstable and difficult computer. Computer scientists were urgently working on creating software that would enable host computers to communicate with one another with a host-to-host protocol. Crocker sent out a Request for Comments (RFC) which was an informal request that seemed inviting to those willing to play by a certain set of rules. This RFC had a sense of community gathering with the intent of networking to everyone. UCLA required interface hardware to add to their host-to-IMP. They asked Scientific Data Systems to create this hardware but they said they would need a lot of money and months of time to create it. Mike Wingfield, a graduate student, offered to take the job for much cheaper and was able to complete it much faster. In 1970 the creation of a complete protocol was accomplished and was labeled the Network Control Protocol.


Chapter 6 Blog

Although the network was coming along well there was a lack of connectivity to the East Coast where important places like MIT and Lincoln Laboratory were located. ARPA’s budget had also reached a climax and was beginning to decline as the Vietnam War sucked up more government funding. In March the very first circuit to travel coast to coast in the ARPA network was implemented. Heart’s desire for a reliable and stable network led him to build a new technology, remote maintenance and diagnostics, which would be able to control and maintain the network remotely. BBN was able to set up a loop between the host and the modem allowing for them to perform loopback tests which would indicate areas with troubles. UCLA’s Network Measurement Center attempted to crash the network by overloading it. They found that under normal activity the network was able to perform just as well as BBN had predicted it would. Ornstein and Heart were getting fed up with receiving bugged machines from Honeywell and in 1970 he ordered a shipment of a new machine to turn around because of faulty equipment. Heart’s group of technicians and Roberts had talked about attempting to connect multiple users to the net without the use of a host computer. If they were successful then thousands of users would be able to access the network without living close to the host computer, allowing for a more practical network. In 1971 Kahn and Vezza assembled a group of investigators from around the United States to gather at MIT for demonstration of the network. The ICCC demonstration showed the public the potential for packet switching technology and proved to computer makers that a whole new market may be on the horizon.

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