2022年思科认证考试（ＣＣＮＡ）考试模拟题７２—７８及答案(1).docx

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1、2022年思科认证考试（）考试模拟题及答案(1)Questions72. xINx The size of a window in a TCP segment establishes what? (Choose one.)a) The maximum number of bytes that a single frame may not exceedb) The allowable bandwidth for this TCP sessionc) The number of octets that the receiver must be willing to acceptd) The num

2、ber of 32-bit words in the headere) The number of octets that the sender is willing to accept73. xINx Which protocols are best described as connection-oriented and reliable? (Choose two.)a) UDPb) IPc) TCPd) IPXe) TCP over IPf) UDP over IP74. xINx A Telnet session to a remote host would be addressed

3、to what port number at the remote host? (Choose one.)a) UDP port 53b) TCP port 53c) UDP port 21d) TCP port 21e) UDP port 161f) TCP port 2375. xINx TCP source port number(s): (Choose the one that best describes.)a) Depends on the application being accessed on the destination host.b) Depends on the ap

4、plication running on the source host.c) Are usually assigned by the source host, and are typically some number greater than 1023.d) Are assigned by the source host and are usually one of the well known port numbers.e) Must be negotiated by the sender and receiver during session setup.76. xINx In a T

5、CP acknowledgment, the ack number refers to: (Choose one.)a) A sequential number beginning with 1, and incremented by 1 with each exchange, that identifies this exchange of packets as being completeb) The number of the packet expected nextc) The number of the packet expected next, plus 1d) A number

6、agreed upon at session establishment, which will be used by the receiver to indicate a successful exchange of packetse) TCP does not use acknowledgments.Reference the diagram and configurations below for Questions 77 and 78:Router_C#sh runBuilding configuration.Current configuration:!version 11.2!hostname Router_C!appletalk routingipx routing 0060.09c3.df60!interface Ethernet0ip address 172.16.1.1 255.255.255.0appletalk cable-range 100-105 103.243appletalk zone rightipx network DAD!interface Ethernet1no ip addressshutdown!interface Serial0ip unnum