TAILIEUCHUNG - Internetworking with TCP/IP- P51

Internetworking with TCP/IP- P51: TCP/IP has accommodated change well. The basic technology has survived nearly two decades of exponential growth and the associated increases in traffic. The protocols have worked over new high-speed network technologies, and the design has handled applications that could not be imagined in the original design. Of course, the entire protocol suite has not remained static. New protocols have been deployed, and new techniques have been developed to adapt existing protocols to new network technologies | For Further Study 459 FOR FURTHER STUDY BOOTP is a standard protocol in the TCP IP suite. Further details can be found in Croft and Gilmore RFC 951 which compares BOOTP to RARP and serves as the official standard. Reynolds RFC 1084 tells how to interpret the vendor-specific area and Braden RFC 1123 recommends using the vendor-specific area to pass the subnet mask. Droms RFC 2131 contains the specification for DHCP including a detailed description of state transitions another revision is expected soon. A related document Alexander and Droms RFC 2132 specifies the encoding of DHCP options and BOOTP vendor extensions. Finally Droms RFC 1534 discusses the interoperability of BOOTP and DHCP. EXERCISES BOOTP does not contain an explicit field for returning the time of day from the server to the client but makes it part of the optional vendor-specific information. Should the time be included in the required fields Why or why not Argue that separation of configuration and storage of memory images is not good. See RFC 951 for hints. 233 The BOOTP message format is inconsistent because it has two fields for client IP address and one for the name of the boot image. If the client leaves its IP address field empty the server returns the client s IP address in the second field. If the client leaves the boot file name field empty the server replaces it with an explicit name. Why Read the standard to find out how clients and servers use the HOPS field. When a BOOTP client receives a reply via hardware broadcast how does it know whether the reply is intended for another BOOTP client on the same physical net When a machine obtains its subnet mask with BOOTP instead of ICMP it places less load on other host computers. Explain. Read the standard to find out how a DHCP client and server can agree on a lease duration without having synchronized clocks. Consider a host that has a disk and uses DHCP to obtain an IP address. If the host stores its address

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