Please answer following questions: ARP, The Address Resolution Protocol, works b
ID: 3572653 • Letter: P
Question
Please answer following questions:
ARP, The Address Resolution Protocol, works be sending broadcast messages asking "who has IP address." The destination responds with its MAC address. Why is the network not bogged down with thousands of broadcast messages? The textbook describes the working set of a process as sufficient real memory (RAM) to satisfy the locality of the process. What does that mean? What are the three factors that together determine access time of a disk? That is, what three factors determine how long it takes to read or write a particular sector? (Just name them)Explanation / Answer
Answer 14
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol address (IP address) to a physical machine address that is recognized in the local network. For example, in IP Version 4, the most common level of IP in use today, an address is 32 bits long. In an Ethernet local area network, however, addresses for attached devices are 48 bits long. (The physical machine address is also known as a Media Access Control or MAC address.)
When an incoming packet destined for a host machine on a particular local area network arrives at a gateway, the gateway asks the ARP program to find a physical host or MAC address that matches the IP address. The ARP program looks in the ARP cache and, if it finds the address, provides it so that the packet can be converted to the right packet length and format and sent to the machine. If no entry is found for the IP address, ARP broadcasts a request packet in a special format to all the machines on the LAN to see if one machine knows that it has that IP address associated with it. A machine that recognizes the IP address as its own returns a reply so indicating. ARP updates the ARP cache for future reference and then sends the packet to the MAC address that replied.
Answer 16
Access time:The time a program or device takes to locate a single piece of information and make it available to the computer for processing.
or
The access time or response time of a rotating drive is a measure of the time it takes before the drive can actually transfer data.