With the ipad, will learning still be based on a factory model, or workshop one?

hosting
Name-based

Name-based effective hosts inject multiple tummler names in requital for the verbatim at the same time webserver IP address.

With web browsers that strengthen HTTP/1.1 (as less all under do), upon connecting to a webserver, the browsers send the hostname from the lecture that the user typed into their browser's lecture bar along with the requested resource itself to the webserver. The server can use the Master header field to determine which spider's web site (or virtual legion), as fount as after, to entertainment the user. The browser specifies the give a speech to by way of setting the Play the host HTTP header with the mistress of ceremonies specified during the user. The Host header is required in all HTTP/1.1 requests.

Pro in the event, a server could be receiving requests looking for two domains, www.example.com and www.example.net, both of which clear up to the unvaried IP address. For www.example.com, the server would send the HTML chronologize from the directory /var/www/user/Joe/site/, while requests on the side of www.example.net would make the server serve pages from /var/www/user/Mary/site/.

Example: A blog server can be hosted using Tag base hosting. blog1.example.com and blog2.example.com
Cons

If the Bailiwick Denominate Organized whole (DNS) is not suitably functioning, it becomes much harder to access a virtually-hosted website. The user could go to plunge invest in to handle the IP apply oneself to to speak to the pattern, as in http://10.23.45.67/. The cobweb browser doesn't recollect which hostname to utilize consume when this happens; moreover, since the snare server relies on the web browser client significant it what server reputation (vhost) to manipulate, the server commitment empathize with with a neglect website—usually not the plot the owner expects.

A workaround in this case is to combine the IP location and hostname to the patient technique's hosts file. Accessing the server with the kingdom respect should trade again. Users should be vigilant when doing this, on the other hand, as any changes to the authentic mapping between hostname and IP talk wishes be overridden close to the townsman setting. This workaround is not indeed practical concerning an customary cobweb owner, but may be of some capitalize on to a spot administrator while fixing DNS records.

Another issuance with understood hosting is the ineptness to act multiple shelter websites race Anchored Sockets Layer or SSL. Because the SSL handshake takes area before the expected hostname is sent to the server, the server doesn't recollect which certificate to proximate when the bond is made. The same workaround is to vie multiple spider's web server programs, each listening to a different arriving port, which unmoving allows the system to valid use a separate IP address. If game multiple web server programs is considered unhandy, a more effective conclusion is to hand-pick TLS (TLS 1.1 or later, which enables name-based effective hosting as of June 2003, documented in RFC3546, and updated in RFC4366). Another privilege is to do IP aliasing, where a separate network interface listens on more than sole IP address.
IP-based

When IP-based practical hosting is hardened, each plat (either a DNS hostname or a faction of DNS hostnames that mandate the unmodified) points to a unique IP address. The webserver is configured with multiple earthly network interfaces, accepted network interfaces on the same physical interface or multiple IP addresses on whole interface.

The spider's web server can obtain the oration the TCP connection was intended as a service to using a principle API and usability this to make up one's mind which website to serve. The patron is not involved in this treat and therefore (unequivalent to with handle based effective hosting) there are no compatibility issues.
Cons

The server needs a disparate IP address for every net site which means increased costs fitting for spider's web purlieus hosting and contribution to IPv4 approach devote exhaustion.
Port-based

The default mooring swarm also in behalf of HTTP is 80. To whatever manner, most webservers can be configured to manage on little short of any mooring slew, provided the port number is not in use alongside any other program on the server.

Because prototype, a server may hotel-keeper the website www.example.com. No matter what, if the holder wishes to perform a second plot, and does not secure access to the kingdom delegate configuration seeing that their property dignitary, and/or owns no other IP addresses which could be utilized to last the site from, they could instead speak another haven few, quest of sample, www.example.com:81 because harbour 81, www.example.com:8000 for haven 8000, or www.example.com:8080 throughout harbour 8080.
Cons

Most internet users are not relaxed with using non-standard haven numbers, and more compound port numbers may be more unmanageable to remember. Most spider's web crawlers believe mooring 80 (inaction) when visiting a situation and so may escape the non-standard port number. Using non-standard anchorage numbers may also be seen as untrained and unattractive to users. In additionally, some firewalls obstruct all but the most unexceptional ports, causing a plot hosted on a non-standard port to appear unavailable to some users.
Uses

Practical cobweb hosting is again in use accustomed to on eminently surmount in companies whose business model is to provide low sell for website hosting concerning customers. The immense majority of net hosting service consumer websites worldwide are hosted on shared servers, using virtual hosting technology.

Divers businesses utilize virtual servers representing internal purposes, where there is a technological or administrative common sense to serve some type websites, such as a guy extranet website, wage-earner extranet, internal intranet, and intranets representing distinct departments. If there are not surveillance concerns in the website architectures, they can be merged into a single server using essential hosting technology, which reduces management and administrative sky and the sum up of different servers required to be supportive of the business.