ITM 301 Chapter Notes - Chapter 2: Ifconfig, Distributed Database, Default Gateway

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 301
• Professor: Franklyn Prescod

Document Summary

Application layers fqsns, computer names and host names. 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 id or company-id. Last 24 bits make up the extension identifier or device id. Manufacturer"s assign each nic a unique device id. Character-based names are easier to remember the numeric ip addresses. Last part of an fqdn is called the top-level (tld) Domain names must be registered with an internet naming authority that works on behalf of icann. Icann restricts what type of hosts can be associated with, . arpa, . mil, . int, Name resoultions is the process of discovering the ip address of a host when you know the fqdn. Arpa reverse lookup domain (special internet function) Org non-commercial organization (such as a non-profit agency) Net network (such as an isp)