ITM 301 Lecture Notes - Lecture 2: Distributed Database, Internet Assigned Numbers Authority, Dns Zone

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 301
• Professor: Nurul Huda

Document Summary

Application layer fqdns, computer names, and hostnames. Ipv4 addresses have 32 bits and are written as four decimal numbers called octets. Ipv6 addresses have 128 bits and are written as eight blocks of hexadecimal numbers. First 24 bits are known as the oui ( organizationally unique identifier) or block. Last 24 bnits make up the extension identifier or device id. Manufacturer"s assign each nic a unique device id. Applicaiton layer client-server sytem of computers and databases made up of these elements. The entire collection of computer names and their associated ip addresses stored in databases on dns name servers around the globe. Hold databases, which are organized in a hierarchical structure. A dns client that requests information from dns name servers. Dns name servers are organized in a hierarchical structure. At the root level, 13 clusters of root server hold information used to locate top-level. Tld servers hold information about authoritative servers.