DISTRIBUTED COMPUTER SYSTEM _ THIS IS MULTIPLE CHOICE - PLease just help me with answers 4. Among other things, what are

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DISTRIBUTED COMPUTER SYSTEM _ THIS IS MULTIPLE CHOICE - PLease
just help me with answers
4. Among other things, what are the differences between sockets
using the TCP
and UDP protocols?
(a) TCP has a smaller system overhead.
(b) UDP ensures that packets are delivered in the correct
order, while TCP does not.
(c) UDP can be used for multicast transmissions, while TCP
cannot.
(d) UDP is stateless, while TCP is not.
(e) There is no difference: these are the two names for the
same protocol.
5. In which application should we consider using UDP, instead of
TCP?
(a) Video transmission.
(b) Transmission of large binary data files.
(c) VoIP transmission.
(d) Single packet transmission.
(e) It is always better to use UDP, because TCP sucks and
nobody uses it.
6. What are the advantages of the NFS filesystem?
(a) Great scalability on large clusters and
supercomputers.
(b) Simplicity and high popularity.
(c) Dynamic development in the recent years.
(d) Security achieved by data replication.
(e) NFS has no advantages and nobody uses it.
7. DNS traditionally has been using UDP for:
(a) Transferring zone files.
(b) Sending requests and responses.
(c) Communications using DNSSEC.
(d) All transmissions.
(e) None of the above.
8. What is the disadvantage of using threads to serve various
connections in a
server?
(a) Relatively hogh system overhead of a thread.
(b) Vulnerability to a DDoS attack, by enforcing creation of
an outrageous number of
threads.
(c) The threads do not assure enough data separation.
(d) This is forbidden by the law.