Ping
ping hostnameyou can ping different ways, by hostname or IPexample by ip to Google's dns server.ping 8.8.8.8example by hostname to google.comping google.com
Typically Ping is used for that feature.
The user computer initiates it by sending the request over some random protocol to the http server, which responds by sending requested information over port :80 eq the http protocol to the user computer.
By sending a friend request.
by sending embee request to friends
by sending them a request
The other person might send you a friend request on Moshi Monsters.
Passive-interface command is used in all routing protocols to disable sending updates out from a specific interface.
When you press enter to go to website your computer is actually sending a request to another one (the server) which hosts the website. If, after a certain amount of time, your computer doesn't receive an answer from the server, it is said to have "timed out"
Your computer is sending multicast traffic to 239.255.255.250 as part of the Simple Service Discovery Protocol (SSDP), which is used for discovering Universal Plug and Play (UPnP) devices on a local network. This multicast address is reserved for SSDP, allowing devices to announce their presence and services, enabling seamless connectivity and interaction among networked devices. If you see this traffic, it's typically a normal part of network operations related to device discovery.
http://support.microsoft.com/kb/923200 When the sending computer sends FIN, the state of the TCP connection is set to FIN_WAIT_2. After the TCP connection has been closed, the sending computer sends RST in order to reset the connection if the receiving computer sends any packets to the sending computer.
no but you can keep track by another e-mail from your providerYes, you can request it in Outlook Express and Outlook but no guarantee the recipient will give you one.