ITM 301 Lecture Notes - Lecture 5: Domain Name System, Organizationally Unique Identifier, Dns Zone

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

Document Summary

Itm 301 overview of addressing on networks. Application layer fqdns, computer names, and host names. Network layer ip address: ipv4 addresses have 32 bits (written as 4 decimals: octets, ipv6 addresses have 128 bits (written as 8 blocks of hexadecimal numbers) Data link layer mac address: aka physical address. Tradition mac addresses contain two parts: first 24 bits are known as the oui (organizationally unique identifier) or block id or company-id. Assigned by the ieee: last 24 bits make up the extension identifier or device id. Manufacturer"s assign each nic a unique id. Character-based names are easier to remember than numeric ip addresses. Last part of an fqdn is called the top-level domain (tld) Domain names must be registered with an internet naming authority that works on behalf. Icann: icann restrict what type of hosts can be associated with: . arpa, . mil, . int, . edu, and . gov.