The Online World resources handbook

Web/Internet tools and pointers http://home.eunet.no/~presno/bok/v6.html
TCP/IP
Transmission Control Protocol/Internet Protocol. Communications protocols that
internetwork dissimilar systems connected to the Internet. TCP/IP supports services
such as remote login (telnet), file transfer (FTP), mail (SMTP and POP).
An old FAQ is available at:
http://www iso8859 5.stack.net/pages/faqs/tcpip/tcpipfaq.html
You should also take a look at
ftp://rtfm.mit.edu/pub/usenet/news.answers/internet/tcp ip
Telnet
$ SURJUDP RQ WKH ,QWHUQHW WKDW DOORZV \RX WR H[HFXWH FRPPDQGV RQ UHPRWH FRPSXWHUV
as though you were logged in locally. You can browse menus, read text files, use gopher
services, and search online databases. Sometimes, you can join live, interactive games
and chat with other callers. Usually, you cannot download files or list file directories.
To set up a telnet connection, you need to know the name of the computer site you
want to access and have a valid user name and password for that site.
The site's name can be in words, like "VM1.NODAK.EDU," or a numeric address,
like "134.129.111.1". Some services require that you connect to a specific "port" on the
remote system. Enter the port number, if there is one, after the Internet address.
Some telnet sites allow for guest logins. Guest accounts typically are restricted to
the types of actions they can perform during a session. Although your telnet session is
actually running software directly on the site's telnet computer, you will be running a
program that prevents you from accessing the general capabilities of that computer.
Once you are connected to a telnet site, you will often see a menu driven system which
is under the control of the telnet site, and guides you through the actions you may
perform at that site.
Note: If you get a return message saying that the host was unknown or unavailable,
first check if your address syntax was correct. If it is, try later. Also, your telnet address
may have changed.
Another common use of telnet is for users to be able to log into their computers
from remote locations. In this case, users enter their own user names and passwords and,
therefore, have the same user privileges they would have when logged in without using
telnet.
Accessing commercial services like CompuServe via telnet gives you the
convenience and time savings of not having to log off and on as you move from one host
system to another. There is normally no real time cost advantage, unless your location is
closer to an Internet node than any of these services' regular access point.
Telnet is not available to users who have email only access to the Internet.
URL (Universal Resource Locator)
A Universal Resource Locator is the address of any multimedia resource on the Internet.
A sort of standardized description of the location of a given network resource, and the
protocol used to access the resource.
A URL may point to a WWW page file (an HTML file), a GIF image, an MPEG
movie, an AU sound file, a ftp file or directory of files, a gopher menu, a Usenet news
group, a telnet port, and so on. URLs identify the type and location of network and local
resources.
Many users with interactive connection to the Internet, use remote network
resources through local programs. These programs are called local clients, and there are
such programs for anonymous ftp, irc, Mosaic, WWW, and more.
The local clients programs often require a terse, machine readable resource
addressing format, called "Universal Resource Locater" (URL). It is a draft standard for
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