CS 6250 exam 1 with correct detailed answers.

CS 6250 exam 1 with correct detailed
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answers
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How |did |Licklider |and |his |team |in |the |early |1960s |experiment |with |a |precursor |to |the |internet? |-
|CORRECT |ANSWER-Connecting |two |computers |over |a |dial-up |telephone |line




What |is |the |Domain |Name |System |(DNS) |designed |to |do |primarily? |- |CORRECT |ANSWER-Translate
|domain |names |into |IP |addresses




What |is |the |architectural |design |of |the |Internet |protocol |stack |based |on? |- |CORRECT |ANSWER-Layers



T/F: |Both |the |data |link |and |transports |layer |protocols |may |provide |error |correction |- |CORRECT
|ANSWER-True




What |allows |for |communication |between |the |applications |layer |and |the |transport |layer |- |CORRECT
|ANSWER-Sockets




Which |of |the |following |protocols |belong |to |the |application |layer? |[ethernet/DNS/UDP/IP] |- |CORRECT
|ANSWER-DNS




Which |two |protocols |belong |to |the |transport |layer? |[IP/TCP/UDP/HTTP] |- |CORRECT |ANSWER-TCP,
|UDP




When |an |application |sends |a |packet |of |information |across |the |network, |this |packet |travels |down |the
|IP |stack |and |undergoes |what |process |- |CORRECT |ANSWER-Encapsulation




According |to |the |end-to-end |principle, |where |should |most |of |the |Internet's |functionality/intelligence
|be |implemented? |- |CORRECT |ANSWER-At |the |edges |of |the |network




What |is |the |difference |between |hubs, |bridges, |and |routers? |- |CORRECT |ANSWER-They |operate |on
|different |layers |of |the |IP |stack

, T/F: |the |UDP |and |TCP |protocols |have |a |large |overlap |of |functionality |- |CORRECT |ANSWER-false



T/F: |the |transport |layer |protocols |offer |a |logical |connection |between |processes, |only |if |the |hosts
|reside |in |the |same |network |- |CORRECT |ANSWER-false




T/F: |a |sender |host |receives |a |message |from |the |application |layer |it |encapsulates |it |with |the |transport
|layer |header |before |passing |it |down |to |the |network |layer |- |CORRECT |ANSWER-true




T/F: |an |application |running |on |a |host |can |bind |to |multiple |sockets |simultaneously |- |CORRECT
|ANSWER-true




T/F: |a |host |cannot |maintain |a |TCP |socket |and |a |UDP |socket |simultaneously |- |CORRECT |ANSWER-false



T/F: |the |identifier |of |a |UDP |socket |is |a |tuple |of |destination |IP |address |and |port |- |CORRECT |ANSWER-
true



T/F: |the |identifier |of |a |TCP |socket |is |a |tuple |of |source |IP |address |and |port |- |CORRECT |ANSWER-false



T/F: |UDP |is |considered |more |lightweight |than |TCP |- |CORRECT |ANSWER-true



T/F: |when |two |hosts |use |UDP |to |send |and |receive |messages, |they |need |to |signal |the |end |of |sending
|data |to |each |other |when |they |are |done |- |CORRECT |ANSWER-false




T/F: |one |of |the |functionalities |that |UDP |offers |is |to |increase |or |decrease |the |pace |with |which |the
|sender |sends |data |to |the |receiver |- |CORRECT |ANSWER-false




T/F: |UDP |offers |basic |error |checking |- |CORRECT |ANSWER-true



T/F: |assume |hosts |A, |B, |and |C. |Host |A |has |a |UDP |socket |with |port |123. |Hosts |B |and |C |each |send |their
|own |UDP |segment |to |Host |A. |Hosts |B |and |C |cannot |use |the |same |destination |port |123 |for |sending

|their |UDP |segment |- |CORRECT |ANSWER-false