6.8 Questions-Chapter 6

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You can take this quiz online at http://www.net-intro.com/quiz/

  1. What is the primary problem the Transport (TCP) layer is supposed to solve?
    a) Move packets across multiple hops from a source to destination computer
    b) Move packets across a single physical connection
    c) Deal with lost and out-of-order packets
    d) Deal with encryption of sensitive data
  2. What is in the TCP header?
    a) Physical address
    b) IP Address and Time to Live
    c) Port number and offset
    d) Which document is being requested
  3. Why is “window size” important for the proper functioning of the network?
    a) Because packets that are too large will clog fiber optic connections
    b) It prevents a fast computer from sending too much data on a slow connection
    c) It limits the number of hops a packet can take before it is dropped
    d) It determines what part of an IP address is the network number
  4. What happens when a sending computer receives an acknowledgement from the receiving computer?
    a) The sending computer resends the data to make sure it was transmitted accurately
    b) The sending computer sends more data up to the window size
    c) The sending computer sends an “acknowledgment for the acknowledgment”
    d) The sending computer sends the acknowledgement to the Internet Map (IMAP)
  5. Which of these detects and takes action when packets are
    lost?
    a) Sending computer
    b) Network gateway
    c) Core Internet routers
    d) Receiving computer
  6. Which of these retains data packets so they can be retransmitted if a packets lost?
    a) Sending computer
    b) Network gateway
    c) Core Internet routers
    d) Receiving computer
  7. Which of these is most similar to a TCP port?
    a) Train station
    b) Undersea network cable
    c) Apartment number
    d) Sculpture garden
  8. Which half of the client/server application must start first?
    a) Client
    b) Server
  9. What is the port number for the Domain Name System?
    a) 22
    b) 80
    c) 53
    d) 143
  10. What is the port number for the IMAP mail retrieval protocol?
    a) 22
    b) 80
    c) 53
    d) 143

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