Computer Science 360
                                 Quiz  4             Name___________________

1. Which of the following best  characterizes the way the DNS presently works

   a. every week or so a central server   b. every week or so sysadmins
      downloads a database that maps         send an email containing all
      all names on the Internet to their     of their host names and IP
      IP address to each host on the         addresses to a central DNS
      Internet                               administrator who updates a
                                             global data base referenced by
                                             all "root name servers"

   c. every week or so hosts on the       d. The DNS system is a heirarcical
      Internet upload their own names and    distributed database and there
      IP addresses to a central server       does not exist ANY central
      that provides name service to the      repository mapping all names
      entire internet.                       to IP address.

2. When a UDP (SOCK_DGRAM, IPPROTO_IP) socket is in use, an attempt to connect()
   the socket

   a. will fail unless an application     b. will fail even if an application
      on the remote host has bound to        on the remote host is bound to
      the remote port                        the remote port UNLESS the process
                                             bound to the socket is trying to
                                             read from it.

   c. will succeed  ONLY if the remote    d. can return success even if the
      host address in the struct             remote IP address is not
      sockaddr_in specifies the IP address   presently assigned to ANY host.
      of a host on the Internet that
      is presently powered on.

3. Root nameservers will communicate

   a. only with authorized nameservers    b. only with applications running
                                             with root (superuser) privileges

   c. with any program regardless of
      whether it is an "official"
      nameserver or its privilege state

4. Before calling gethostbyname()

   a. a socket MUST be created            b. a socket must NOT be created

   c. it doesn't matter whether or
      not a socket has been created.

5. Suppose a makefile contains the following lines:
connect: connect.c ${DEPS}
        gcc -o $@ $@.c ${DEBUG} ${OBJS} 2> $@.err
   when the user enters "make connect" the value of $@ becomes:

   a. a.out                                b. connect.o

   c. connect:                             d. connect