Review from last week

							Computer Networks


      Review
   Chapters 26, 27
An advantage of online, shared file access
is:
    A. It requires no changes to the
       application
    B. It works when the network is down
    C. Many users can update the same file
       simultaneously
    D. It is faster than local access
    E. None of the above
An advantage of online, shared file access
is:
    A. It requires no changes to the
       application
    B. It works when the network is down
    C. Many users can update the same file
       simultaneously
    D. It is faster than local access
    E. None of the above
A disadvantage of online, shared file access
is:
    A. Users have access to more files
    B. Updates can be lost
    C. The access may be slower
    D. All the data must be copied
    E. Many users can read the same file
A disadvantage of online, shared file access
is:
    A. Users have access to more files
    B. Updates can be lost
    C. The access may be slower
    D. All the data must be copied
    E. Many users can read the same file
Compared with homogeneous network file
access, heterogeneous file access is:
  A. Just as easy
  B. Only slightly harder
  C. Much more difficult
  D. They are the same thing
  E. None of the above
Compared with homogeneous network file
access, heterogeneous file access is:
  A. Just as easy
  B. Only slightly harder
  C. Much more difficult
  D. They are the same thing
  E. None of the above
An advantage of whole file copying is:
  A. The network is only needed while the
     file is copied
  B. The entire file must be copied
  C. File access may be slower
  D. It requires no changes to the
     application
  E. All of the above
An advantage of whole file copying is:
  A. The network is only needed while the
     file is copied
  B. The entire file must be copied
  C. File access may be slower
  D. It requires no changes to the
     application
  E. All of the above
A disadvantage of whole file copying is:
  A. The network is only needed while the
     file is copied
  B. The entire file must be copied
  C. File access may be slower
  D. It requires no changes to the
     application
  E. None of the above
A disadvantage of whole file copying is:
  A. The network is only needed while the
     file is copied
  B. The entire file must be copied
  C. File access may be slower
  D. It requires no changes to the
     application
  E. None of the above
File Transfer Protocol (FTP) is an example
of:
   A. Whole file copying
   B. Online shared file access
   C. A Transport Layer protocol
   D. A Transfer Layer protocol
   E. A connectionless, datagram protocol
File Transfer Protocol (FTP) is an example
of:
   A. Whole file copying
   B. Online shared file access
   C. A Transport Layer protocol
   D. A Transfer Layer protocol
   E. A connectionless, datagram protocol
FTP can be used to transfer
  A. Only text files
  B. Only binary files
  C. Both text and binary files
  D. Only HTML files
  E. Only FTML files
FTP can be used to transfer
  A. Only text files
  B. Only binary files
  C. Both text and binary files
  D. Only HTML files
  E. Only FTML files
FTP uses:
  A. One TCP connection
  B. Two TCP connections
  C. One UDP connection
  D. Two UDP connections
  E. None of the above
FTP uses:
  A. One TCP connection
  B. Two TCP connections
  C. One UDP connection
  D. Two UDP connections
  E. None of the above
The FTP control connection exists:
  A. Only while a command is being
     processed
  B. Only while data is being transferred
  C. For the entire FTP session
  D. Only while data is not being
     transferred
  E. None of the above
The FTP control connection exists:
  A. Only while a command is being
     processed
  B. Only while data is being transferred
  C. For the entire FTP session
  D. Only while data is not being
     transferred
  E. None of the above
The FTP data connection exists:
  A. Only while a command is being
     processed
  B. Only while data is being transferred
  C. For the entire FTP session
  D. Only while data is not being
     transferred
  E. None of the above
The FTP data connection exists:
  A. Only while a command is being
     processed
  B. Only while data is being transferred
  C. For the entire FTP session
  D. Only while data is not being
     transferred
  E. None of the above
Trivial FTP uses
  A. TCP
  B. UDP
  C. FTP
  D. SMNP
  E. FDP
Trivial FTP uses
  A. TCP
  B. UDP
  C. FTP
  D. SMNP
  E. FDP
The first packet in TFTP specifies:
  A. The MTU for the transfer
  B. The file and direction for the transfer
  C. The initial sequence number
  D. The timeout value each side should
     use
  E. The size of the file
The first packet in TFTP specifies:
  A. The MTU for the transfer
  B. The file and direction for the transfer
  C. The initial sequence number
  D. The timeout value each side should
     use
  E. The size of the file
The size of a TFTP packet
  A. Depends on the size of the file
  B. Depends on fragmentation
  C. Is always the MTU of the local
     network
  D. Is always the same
  E. Changes as packets are successfully
     acknowledged
The size of a TFTP packet
  A. Depends on the size of the file
  B. Depends on fragmentation
  C. Is always the MTU of the local
     network
  D. Is always the same
  E. Changes as packets are successfully
     acknowledged
To achieve reliability, TFTP uses
  A. TCP
  B. Timeouts for the sender
  C. Timeouts for the receiver
  D. Timeouts for both the sender and
     receiver
  E. A sliding window
To achieve reliability, TFTP uses
  A. TCP
  B. Timeouts for the sender
  C. Timeouts for the receiver
  D. Timeouts for both the sender and
     receiver
  E. A sliding window
When the source times out in TFTP it will
 A. Request the last acknowledgement
 B. Transmit the next packet
 C. Retransmit the last packet
 D. Restart the file
 E. Send an error packet
When the source times out in TFTP it will
 A. Request the last acknowledgement
 B. Transmit the next packet
 C. Retransmit the last packet
 D. Restart the file
 E. Send an error packet
When the target times out in TFTP it will
 A. Transmit a negative
    acknowledgement
 B. Acknowledge the next packet
 C. Retransmit the last acknowledgement
 D. Double its timeout value
 E. Send an error packet
When the target times out in TFTP it will
 A. Transmit a negative
    acknowledgement
 B. Acknowledge the next packet
 C. Retransmit the last acknowledgement
 D. Double its timeout value
 E. Send an error packet
To prevent the Sorcerer’s Apprentice Bug
from occurring, TFTP:
   A. Uses timeout and retransmission
   B. Uses positive acknowledgements
   C. Doubles the timeout for each packet
      lost
   D. Reduces the packet size
   E. Does nothing
To prevent the Sorcerer’s Apprentice Bug
from occurring, TFTP:
   A. Uses timeout and retransmission
   B. Uses positive acknowledgements
   C. Doubles the timeout for each packet
      lost
   D. Reduces the packet size
   E. Does nothing
Online shared file access:
  A. Must be embedded in the operating
     system
  B. Can be implemented at the
     application layer
  C. Requires application programs to be
     recompiled
  D. Is accomplished using FTP
  E. Must use TCP
Online shared file access:
  A. Must be embedded in the operating
     system
  B. Can be implemented at the
     application layer
  C. Requires application programs to be
     recompiled
  D. Is accomplished using FTP
  E. Must use TCP
How is SMTP different from other
application protocols?
  A. It handles binary data
  B. It works when the target is
      unavailable
  C. It works when the source is
      unavailable
  D. It is a transmit only protocol
  E. None of the above
How is SMTP different from other
application protocols?
  A. It handles binary data
  B. It works when the target is
      unavailable
  C. It works when the source is
      unavailable
  D. It is a transmit only protocol
  E. None of the above
To support delayed delivery, mail systems
use a technique called:
  A. Spooling
  B. Batching
  C. Slow start
  D. Chunking
  E. Holding
To support delayed delivery, mail systems
use a technique called:
  A. Spooling
  B. Batching
  C. Slow start
  D. Chunking
  E. Holding
A mailbox name:
  A. Can be the same as a username
  B. Can be a job name
  C. Is determined by the local
     administrator
  D. Can be an alias for another mailbox
  E. All of the above
A mailbox name:
  A. Can be the same as a username
  B. Can be a job name
  C. Is determined by the local
     administrator
  D. Can be an alias for another mailbox
  E. All of the above
A mail gateway:
  A. Connects a local network to the
     Internet
  B. Is the same as a router
  C. Connects the user interface to the
     local mail server
  D. Connects a private mail system to
     Internet mail
  E. None of the above
A mail gateway:
  A. Connects a local network to the
     Internet
  B. Is the same as a router
  C. Connects the user interface to the
     local mail server
  D. Connects a private mail system to
     Internet mail
  E. None of the above
SMTP mail is delivered using:
  A. End to end delivery
  B. Through a mail gateway
  C. Through an Internet Post Office
  D. Binary Synchronous Communication
  E. None of the above
SMTP mail is delivered using:
  A. End to end delivery
  B. Through a mail gateway
  C. Through an Internet Post Office
  D. Binary Synchronous Communication
  E. None of the above
SMTP uses:
  A. UDP
  B. TCP
  C. POP3
  D. IMAP
  E. None of the above
SMTP uses:
  A. UDP
  B. TCP
  C. POP3
  D. IMAP
  E. None of the above
Unenhanced SMTP can send messages
containing
  A. Text
  B. Sound
  C. Images
  D. Application data
  E. All of the above
Unenhanced SMTP can send messages
containing
  A. Text
  B. Sound
  C. Images
  D. Application data
  E. All of the above
After a mail server delivers all its messages
to a target:
   A. It waits for more messages to be sent
   B. It starts a timer
   C. It asks the target if it has any mail for
       the source
   D. It can turn the connection around
   E. None of the above
After a mail server delivers all its messages
to a target:
   A. It waits for more messages to be sent
   B. It starts a timer
   C. It asks the target if it has any mail for
       the source
   D. It can turn the connection around
   E. None of the above
To send messages between a user interface
and a mailbox:
  A. POP3 or IMAP4 is used
  B. SMTP is used
  C. MIME is used
  D. A telnet session is established
  E. None of the above
To send messages between a user interface
and a mailbox:
  A. POP3 or IMAP4 is used
  B. SMTP is used
  C. MIME is used
  D. A telnet session is established
  E. None of the above
MIME is used to:
 A. Replace SMTP
 B. Ensure reliability
 C. Add Delivery Notification
 D. Extend the functionality of SMTP
 E. None of the above
MIME is used to:
 A. Replace SMTP
 B. Ensure reliability
 C. Add Delivery Notification
 D. Extend the functionality of SMTP
 E. None of the above
Which of the following are included in a
MIME header?
 A. The MIME Version
 B. The content type
 C. The content encoding
 D. All of the above
Which of the following are included in a
MIME header?
 A. The MIME Version
 B. The content type
 C. The content encoding
 D. All of the above
Which of the following is NOT a MIME
content type?
  A. Text
  B. Binary
  C. Image
  D. Audio
  E. Video
Which of the following is NOT a MIME
content type?
  A. Text
  B. Binary
  C. Image
  D. Audio
  E. Video
To send multiple attachments, MIME uses:
  A. Multiple messages
  B. A compressed directory
  C. A multi-part header
  D. An attachment header
  E. An embedded message header
To send multiple attachments, MIME uses:
  A. Multiple messages
  B. A compressed directory
  C. A multi-part header
  D. An attachment header
  E. An embedded message header
Multi-part messages can be used to
 A. Send the same message to different people
 B. Send the same message in different
      representations
 C. Send messages which are too big for one
      message
 D. Fragment a message when necessary
 E. None of the above
Multi-part messages can be used to
 A. Send the same message to different people
 B. Send the same message in different
      representations
 C. Send messages which are too big for one
      message
 D. Fragment a message when necessary
 E. None of the above
ESMTP adds which of the following?
  A. Interaction between an SMTP server
     and the user interface
  B. Encrypting messages
  C. Immediate delivery
  D. Multi-part messages
  E. Delivery Status Notification
ESMTP adds which of the following?
  A. Interaction between an SMTP server
     and the user interface
  B. Encrypting messages
  C. Immediate delivery
  D. Multi-part messages
  E. Delivery Status Notification