A term related to frequency is wavelength. Radio waves travel at the speed of light. The term wavelength refers to how far the radio signal travels with each cycle. For example, because the speed of light is roughly 300,000,000 meters per second, the wavelength of a 1-Hz radio wave is about 300,000,000 meters. The wavelength [...]
pathping is an interesting command that’s unique to Windows. It’s sort of a cross between the ping command and the tracert command, combining the features of both into one tool. When you run pathping, it first traces the route to the destination address much the way tracert does. Then, it launches into a 25-second test [...]
The hostname command is the simplest of all the TCP/IP. It simply displays the computer’s host name. For example: C:\>hostname doug C:\> Here, the host name for the computer is doug. The Windows version of the hostname command has no parameters. However, the Unix/Linux versions of hostname let you set the computer’s host name as [...]
Using the arp command allows you to display and modify the Address Resolution Protocol (ARP) cache. An ARP cache is a simple mapping of IP addresses to MAC addresses. Each time a computer’s TCP/IP stack uses ARP to determine the Media Access Control (MAC) address for an IP address, it records the mapping in the [...]
If an outgoing packet is not destined for a local subnet (that is taken from the IP address and subnet mark confgured on network interfaces), the packet will be forwarded to a default router (gateway) for further routing decision making and delivery.The default gateway address should be installed in the host’s routing table. This can [...]