Unlike the Transport Control Protocol (TCP) and User Datagram Protocol (UDP), the Internet Control Message Protocol (ICMP) is not designed for carrying data. While ICMP packets do have a data section, ...

The Internet Control Message Protocol (ICMP) is a core protocol in the Internet Protocol (IP) suite. It is mainly used to test the reachability of devices across a network, whether on a Local Area ...

OSI reference model that divides the communication function into a hierarchical structure, and is a protocol used for sending control messages on the Internet. Illumination packet light color and ...

While ICMP is required for IP network traffic redirection and pinging hosts on your LAN or WAN, ICMP can also pose a security concern. David Davis tells you about the basics of ICMP and how to filter ...

My local DNS cache server doesn't cache results for record that doesn't exist. E.g. if a domain don't have a configured AAAA record, a DNS query to the AAAA record will not be cached. I have no idea ...