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video applications typically run over udp rather than tcp because they cannot tolerate retransmission delays however
again suppose des used the simplified s box of the previous two exercises and also assume we perform only a single
perform round i 1 of des encryption using the result of the previous exercise to fill in li and ri and let ki1 be
find an encryption utility eg the unix des command or pgp on your system read its documentation and experiment with it
suppose we want returning rtcp reports from receivers to amount to no more than 5 of the outgoing primary rtp stream if
as presented in the text smtp involves the exchange of several small messages in most cases the server responses do not
find out what other features dns mx records provide in addition to supplying an alias for a mail server the latter
mime supports multiple representations of the same content using the multipart alternative syntax for example text
find out how to configure an http server so as to eliminate the 404 not found message and have a default and hopefully
why does the http get command on page 654 get httpwwwcsprincetoneduindexhtml http11 contain the name of the server
find out if there is available to you an snmp node that will answer queries you send it if so locate some snmp
try to find situations where an rtp application might reasonably do the following send multiple packets at essentially
discuss how you might rewrite smtp or http to make use of a hypothetical general-purpose requestreply protocol perhaps
take a suitable dns-lookup utility eg nslookup and disable the recursive lookup feature eg with set norecurse so that
one of the central problems faced by a protocol such as mime is the vast number of data formats available consult the
in http version 10 a server marked the end of a transfer by closing the connection explain why in terms of the tcp
when an http server initiates a close at its end of a connection it must then wait in tcp state fin wait 2 for the
what information provided by snmp might be useful to someone planning the ip spoofing attack what other snmp
suppose a very large web site wants a mechanism by which clients access whichever of multiple http servers is closest
the pop3 post office protocol only allows a client to retrieve email using a password for authentication traditionally
find out how smtp hosts deal with unknown commands from the other side and how in particular this mechanism allows for
what is the project duration using any approach you wish eg trial and error develop a loading chart for resources
figure 94 shows the hierarchy of name servers how would you represent this hierarchy if one name server served multiple
use the who is utilityservice to find out who is in charge of your site at least as far as the inter nic is concerned
one feature of the existing dns com hierarchy is that it is extremely widea propose a more hierarchical reorganization