achine you can view the contents of the ARP table using the arp command. arp -a will display the entire table.4.5 NETWORKS AND HOSTSA) Networks and hostsAn IP address actually consists of two parts;a network portionThis is used to identify the network that the machine belongs to.the host portion.Uniquely identifies the host.An IP address in total is 32 bits long. The number of bits used by the network part and the number used by the host part of the address depends on the class of the address.B) IP Address classesThere are three main address classes, A, B and C. Table 1 summarises the differences between the three classes. The class of an IP address can be deduced by the value of the first byte of the address.ClassFirst byte valueSize of network partSize of host partNumber of hostsA1 to 12682416 millionB128 to 191161664,000C192 to 223248254TABLE 14.6 THE PING COMMANDA) PINGThe ping command is a simple utility that provides a simple test of whether or not you can talk to another machine. It is also one method by which you can discover the IP address of a machine.The format of the ping command is simply ping host (where host can be either the hostname or the IP address). The output of the command generally takes one of two formatsverboseIn verbose mode ping continually sends a packet of information from your machine to the destination and reports back the IP address it is sending the information to, how long the information took to be returned, and various other stats.not verboseIn this format ping reports back a simple message indicating whether or not the destination machine is reachable.*Why ping fails ;There are two cases where ping might fail;the machine is not reachableThere is no network connection between your machine and the destination for it to use (e.g. someone has put a back hoe through the fiber linking the two machines or the networking software is not properly configured)the machine is not upThe destination machine is not ...
