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if a packet arrives at host a with bs source address it could just as easily have been forged by any third host c if
the transmission schedule table 64 for a given flow lists for each second the number of packets sent between that time
the transmission schedule table 65 for a given flow lists for each second the number of packets sent between that time
suppose a router has accepted flows with the tspecs shown in table 66 described in terms of token bucket filters with
a sender on a tcp connection that receives a 0 advertised window periodically probes the receiver to discover when the
you are hired to design a reliable byte-stream protocol that uses a sliding window like tcp this protocol will run over
suppose a host wants to establish the reliability of a link by sending packets and measuring the percentage that are
suppose x and y are two tcp sequence numbers write a function to determine whether x comes before y in the notation of
if host a receives two syn packets from the same port from remote host b the second may be either a retransmission of
the sequence number field in the tcp header is 32 bits long which is big enough to cover over 4 billion bytes of data
read the man page or windows equivalent for the unixwindows utility net stat use net stat to see the state of the local
this chapter explains three sequences of state transitions during tcp connection teardown there is a fourth possible
design a simple udp-based protocol for retrieving files from a server no authentication is to be provided stop-and-wait
consider a simple udp-based protocol for requesting files based somewhat loosely on the trivial file transport protocol
if a udp datagram is sent from host a port p to host b port q but at host b there is no process listening to port q
consider the atm abr virtual circuit in figure 627 segmented into two control loops at switch s2a suppose resource
suppose an rsvp router suddenly loses its reservation state but otherwise remains runninga what will happen to the
consider the tcp trace in figure 629 identify time intervals representing slow start on startup slow start after
suppose you are downloading a large file over a 3-kbps phone link your software displays an average-bytes-per-second
suppose tcp is used over a lossy link that loses on average one segment in four assume the band width times delay
give an argument why the congestion-control problem is better managed at the internet level than the atm level at least
consider the taxonomy of figure 623a give an example of a real-time application that is intolerantrate adaptiveb
sketch how an atm switch would implement partial packet discard and early packet discard is either mechanism
consider the following two causes of a 1-second network delay assume acks return instantaneously one intermediate