DCOM 101 Final Exam Questions With Correct Answers

DCOM 101 Final Exam Questions With
Correct Answers
The |Physical |layer |has |been |divided |into |two |sublayers, |called |the |LLC |sublayer |and |the |MAC |
sublayer |- |CORRECT |ANSWER✔✔-False



Which |layer |has |been |subdivided |into |the |Logical |Link |Control |sublayer |and |the |Media |Access |
Control |sublayer? |- |CORRECT |ANSWER✔✔-Data |Link



Which |layer |is |responsible |for |establishing |communication |setup |between |the |source |and |
destination |computers? |- |CORRECT |ANSWER✔✔-Session



Switches |operate |at |this |layer |- |CORRECT |ANSWER✔✔-Data |Link |Layer



Hubs |operate |at |this |layer |- |CORRECT |ANSWER✔✔-Physical |Layer



Sublayer |manages |access |to |the |physical |medium. |- |CORRECT |ANSWER✔✔-Media |Access |
Control |sublayer



Computers |operate |at |this |layer. |- |CORRECT |ANSWER✔✔-Application |Layer



This |sublayer |is |responsible |for |some |error |recovery. |- |CORRECT |ANSWER✔✔-Logical |Link |
Control |sublayer



This |is |the |general |framework |for |how |networking |systems |should |operate. |- |CORRECT |
ANSWER✔✔-OSI |reference |model



Routers |operate |at |this |layer |- |CORRECT |ANSWER✔✔-Network |layer

,This |layer |handles |data |formatting |and |translation |- |CORRECT |ANSWER✔✔-Presentation |layer



This |uses |port |numbers |as |source |and |destination |identifiers |- |CORRECT |ANSWER✔✔-
Transport |layer



This |handles |communication |setup |and |teardown |- |CORRECT |ANSWER✔✔-Session |layer



Which |of |the |following |is |the |correct |order |of |the |layers |of |the |OSI |model |from |layer |1 |to |
layer |7? |- |CORRECT |ANSWER✔✔-Physical, |Data |Link, |Network, |Transport, |Session, |
Presentation, |Application



The |process |of |stripping |the |header |and |trailer |from |a |PDU |is |called |____________. |- |
CORRECT |ANSWER✔✔-deencapsulation



You |are |working |at |the |help |desk |and |you |get |a |message |that |a |user |cannot |access |the |
Internet. |You |open |a |command |prompt, |ping |the |workstation's |IP |address, |and |get |a |response.
|You |ask |the |user |to |try |the |Internet |again. |He |does |so |with |the |same |result— |no |connection. |


Which |type |of |device |is |most |likely |to |be |the |problem? |- |CORRECT |ANSWER✔✔-Network |layer
|device




At |what |layer |do |NICs |operate? |- |CORRECT |ANSWER✔✔-Data |Link



Which |layer |of |the |OSI |model |is |responsible |for |encryption |and |decryption? |- |CORRECT |
ANSWER✔✔-Presentation



at |each |layer |of |the |OSI |model, |data |is |appended |to |the |original |message |and |then |sent |on |to |
the |next |lower |layer. |What |is |this |process |called? |- |CORRECT |ANSWER✔✔-encapsulation

, The |Transport |layer |segments |data |into |smaller |chunks, |the |size |of |which |is |determined |by |
which |of |the |following? |- |CORRECT |ANSWER✔✔-MTU



What |does |the |Transport |layer |use |to |make |sure |that |a |message |is |reassembled |correctly |on |
the |receiving |device? |- |CORRECT |ANSWER✔✔-sequence |number



What |layer |is |responsible |for |making |sure |that |the |data |that |it |sends |and |receives |is |in |a |
format |that |the |receiving |and |sending |computers |can |understand |- |CORRECT |ANSWER✔✔-6



What |is |the |IEEE |standard |that |governs |all |forms |of |Ethernet |media |and |interfaces? |- |CORRECT
|ANSWER✔✔-802.3




What |is |a |PDU? |- |CORRECT |ANSWER✔✔-It |is |the |name |given |to |the |unit |of |information |used |
by |each |layer.



The |____________ |reference |model |is |a |general |framework |for |networking |systems |that |uses |
a |layered |approach |to |reduce |its |complexity. |- |CORRECT |ANSWER✔✔-OSI



One |of |the |problems |that |can |occur |in |the |Network |layer |is |the |incorrect |configuration |of |a |
hosts |IP |address. |- |CORRECT |ANSWER✔✔-True



Which |layer |is |responsible |for |determining |the |best |path |a |packet |should |travel |across |an |
internetwork? |- |CORRECT |ANSWER✔✔-Network



One |job |that |a |router |performs |is |that |of |gatekeeper, |which |means |that |it |can |be |configured |
to |only |allow |certain |packets |access |into |the |network |based |on |a |list |of |rules. |What |is |that |
process |called? |- |CORRECT |ANSWER✔✔-access |control



What |information |would |you |find |in |the |header |of |a |Transport |layer |PDU? |- |CORRECT |
ANSWER✔✔-window |size