August 2017
Intermediate to advanced
1232 pages
39h 57m
English
book
UNIX and Linux System Administration Handbook, 5th Edition
by Trent R. Hein, Evi Nemeth, Garth Snyder, Ben Whaley, Dan Mackin
Content preview from UNIX and Linux System Administration Handbook, 5th Edition
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
|
16 |
DNS: The Domain Name System |
The Internet delivers instant access to resources all over the world, and each of those computers or sites has a unique name (e.g., google.com). However, anyone who has tried to find a friend or a lost child in a crowded stadium knows that simply knowing a name and yelling it loudly is not enough. Essential to finding anything (or anyone) is an organized system for communicating, updating, and distributing names and their locations.
Users and user-level programs like to refer to resources by name (e.g., amazon.com), but low-level network software understands only IP addresses (e.g., 54.239.17.6). ...