Well i'mma try to answer these all to the best of my knowlege:
Originally posted by Scallion:
Got a set of questions I've been pondering:
1. What is ICMP?
2. Are TCP, UDP, and ICMP packets the only types of packets used (At the most basic level, that is.)? If not, what are the most commonly used packets?
3. What is a FQDN (Fully Qualified Domain Name) - I know that much, but nothing else. What is this?
4. What is a "symlink"?
5. How does one generate netmasks?
6. Why would one use a proxy to connect to the Internet?
7. What would be sent through this proxy?
Anyone got the answers? Beyond RTFM?
ICMP is: Internet Control Message Protocol. It is generally used in PING. It allows for the generation of error messages, test packets, and informational messages related to IP
Those are all widly used packets, but theres a lot of others.
FQDN i quote from the dictionary "<networking> (FQDN) The full name of a system, consisting of its local hostname and its domain name, including a top-level domain (tld). For example, "venera" is a hostname and "venera.isi.edu" is an FQDN. An FQDN should be sufficient to determine a unique Internet address for any host on the Internet. This process, called "name resolution", uses the Domain Name System (DNS)."
A SYMLINK is a symbolic link, basically its a link to something locally that is elsewhere. Such as how mail.undergroundnews.com is linked to another portion of the site.
I don't really understand what you mean in #5.
You would use a proxy to mask your identity on the internet. A proxy would show the proxy address as opposed to yours. If you live in a third world country that denies a lot of **** though, theid be packet sniffing your logs. This means that anything you do is picked up at your ISP and not through the internet.
Anything can be sent through a proxy, chat, websites, programs, photos, anything that would be on a website or chat service.