思科认证考试（ＣＣＮＡ）考试模拟题４０—５９及答案

Questions 
40. [OxNx] Which of the following layers sends and receives binary information? 

a) Application Layer 7 
b) Presentation Layer 6 
c) Session Layer 5 
d) Transport Layer 4 
e) Network Layer 3 
f) Data Link Layer 2 
g) Physical Layer 1 

41. [OxNx] Which of the following layers provides end to end connections? 

a) Application Layer 7 
b) Presentation Layer 6 
c) Session Layer 5 
d) Transport Layer 4 
e) Network Layer 3 
f) Data Link Layer 2 
g) Physical Layer 1 


42. [OxNx] Which of the following layers would most likely provide connection oriented service. 

a) Application Layer 7 
b) Presentation Layer 6 
c) Session Layer 5 
d) Transport Layer 4 
e) Network Layer 3 
f) Data Link Layer 2 
g) Physical Layer 1 

43. [OxNx] Which of the following layers controls access to the media? 

a) Application Layer 7 
b) Presentation Layer 6 
c) Session Layer 5 
d) Transport Layer 4 
e) Network Layer 3 
f) Data Link Layer 2 
g) Physical Layer 1 

44. [OxNx] Which of the following layers defines network addressing and determines the best path? 

a) Application Layer 7 
b) Presentation Layer 6 
c) Session Layer 5 
d) Transport Layer 4 
e) Network Layer 3 
f) Data Link Layer 2 
g) Physical Layer 1 

45. [OxNx] Raw data is converted to segments at which layer? 

a) Application Layer 7 
b) Presentation Layer 6 
c) Session Layer 5 
d) Transport Layer 4 
e) Network Layer 3 
f) Data Link Layer 2 
g) Physical Layer 1 

46. [OxNx] Segments are converted to Datagrams at which layer? 

a) Application Layer 7 
b) Presentation Layer 6 
c) Session Layer 5 
d) Transport Layer 4 
e) Network Layer 3 
f) Data Link Layer 2 
g) Physical Layer 1 

47. [OxNx] Datagrams are converted to frames at which layer? 

a) Application Layer 7 
b) Presentation Layer 6 
c) Session Layer 5 
d) Transport Layer 4 
e) Network Layer 3 
f) Data Link Layer 2 
g) Physical Layer 1