12-16-2015
You can approach it from various angles:
a) 1-to-1 mapping is not strictly correct. It can be as many as you want to point your domains to a specific IP. For example, I have this public IP 8x.73.1.9 (all made up, course). And I registered 3 domains: mydomain.com, myotherdomain.net, mythirdsite.org. I can have them all pointed to the same IP. Assuming that I have setup web servers (or mail servers) to each and one of them, they can serve contents distincts from one another while sharing the same IP and users won't even notice that they are connected to 1 IP.
b) With regards to big companies, the IPs that you are connecting to are the ones closest to your location. So 2 people (who are geographical separated) both connecting to youtube.com are actually connecting to different IPs. That is made possible by CDNs, DNS etc. I think IPv6 has inherent support for it via anycast.
c) IPs used by big co's are mostly virtual. Meaning they are not actually tied to a single machine but rather to a group of machine. That provides huge bandwith, failover, loadbalancing etc.
Sorry for my English, I tried my best.
Last edited by mr_zeratul; 12-16-2015 at 03:07 PM..
Reason: typo
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disco(1) General Commands Manual disco(1)
NAME
disco - Mono's Web Service Discovery Tool
SYNOPSIS
disco [options] url
DESCRIPTION
disco is a tool for discovering web services and for retireving the documents that describe those services.
url is the location of a DISCO document, which includes a list of WSDL documents, XML schemas and references to other DISCO documents.
disco downloads the DISCO document and all referenced documents (unless the -nosave option is specified), and saves them to disk.
OPTIONS
The following options are available:
-nologo
Supress the startup logo.
-nosave
Do not save the discovered documents to disk. The default is to save the documents.
-o:directory , -out:directory
The directory where to save the discovered documents. By default, documents are saved in the current directory.
-u:username , -user:username
The user name to use when connecting to the server.
-p:password , -password:password
The password to use when connecting to the server.
-d:domain , -domain:domain
The domain to use when connecting to the server.
-proxy:url
The url of the proxy server to use for http requests.
-proxyusername:username
The user name to use when connecting to the proxy.
-proxypassword:password
The password to use when connecting to the proxy.
-proxydomain:domain
The domain to use when connecting to the proxy.
AUTHORS
Lluis Sanchez Gual (lluis@ximian.com)
LICENSE
disco is released under the terms of the GNU GPL.
SEE ALSO
wsdl(1), soapsuds(1), mono(1), mcs(1)
disco(1)