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A CTCP PING request will determine the ping rate that directly exists between two clients (i.e. discounting the server). The CTCP PING command works by sending an (often) integer argument (a timestamp ) to a target client, the target client then responds by supplying exactly the same numerical parameter.
Block header: blockheader: The header of the block message. The string "(userorip)" will be replaced with "account" or "IP address" depending on whether the blocked target is an account or an IP. Unknown: optional: Not blocked: notblocked: The actions that are not blocked. Unknown: optional: No IP message: noipmessage: Whether the message shown ...
A functionality which lets a computer A find out whether a computer B is reachable and responding is built into the Internet Control Message Protocol (ICMP). Through an "Echo Request" Computer A asks B to send back an "Echo Reply". [2] These two messages are also sometimes called "ping" and "pong" for historical purposes. [citation needed]
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For example, there is a channel for handling RPC requests and responses, a channel for video stream data, a channel for audio stream data, a channel for out-of-band control messages (fragment size negotiation, etc.), and so on. During a typical RTMP session, several channels may be active simultaneously at any given time.
Without ECN, congestion indication echo is achieved indirectly by the detection of lost packets. With ECN, the congestion is indicated by setting the ECN field within an IP packet to CE (Congestion Experienced) and is echoed back by the receiver to the transmitter by setting proper bits in the header of the transport protocol.
Depending on the implementation of the ICMP tunneling software, this type of connection can also be categorized as an encrypted communication channel between two computers. Without proper deep packet inspection or log review, network administrators will not be able to detect this type of traffic through their network. [2]
A ping of death is a type of attack on a computer system that involves sending a malformed or otherwise malicious ping to a computer. [1] In this attack, a host sends hundreds of ping requests with a packet size that is large or illegal to another host to try to take it offline or to keep it preoccupied responding with ICMP Echo replies.