Unformatted text preview: of the bootstrap files, so the server must implement the timeout and
15.4 With its stop-and-wait protocol, TFTP can transfer a maximum of 512 bytes per
client-server round trip. The maximum throughput of TFTP is then 512 bytes divided by
the round-trip time between the client and server. On an Ethernet, assuming a round-trip
time of 3 ms, the maximum throughput is around 170,000 bytes/sec. Chapter 16
16.1 A router could forward an RARP request to some other host on one of the router's
other attached networks, but sending a reply then becomes a problem. The router would
also have to forward RARP replies. file:///D|/Documents%20and%20Settings/bigini/Doc...omenet2run/tcpip/tcp-ip-illustrated/append_d.htm (10 of 20) [12/09/2001 14.48.04] Appendix D: Solutions to Selected Exercises BOOTP doesn't have this reply problem since the address to reply to is a normal IP
address that the routers know how to forward anyway. The problem is that RARP uses
only link-layer addresses, and routers don't normally know these values for hosts on
other, nonattached, networks.
16.2 It could use its own hardware address, which should be unique, and which is set in
the request and returned in the reply. Chapter 17
17.1 All are mandatory except the UDP checksum. The IP checksum covers only the IP
header, while the others start immediately after the IP header.
17.2 The source IP address, source port number, or protocol field might have been
17.3 Many Internet applications use a carriage return and linefeed to mark the end of each
application record. This is NVT ASCII coding (Section 26.4). An alternative technique is
to prefix each record with a byte count, which is used by the DNS (Exercise 14.4) and
Sun RPC (Section 29.2).
17.4 As we saw in Section 6.5, an ICMP error must return at least the first 8 bytes beyond
the IP header of the IP datagram that caused the error. When TCP receives an ICMP error
it needs to examine the two port numbers to determine which connection the error...
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This test prep was uploaded on 04/04/2014 for the course ECE EL5373 taught by Professor Guoyang during the Spring '12 term at NYU Poly.
- Spring '12