CCNA51~100題解析－Johnson峰的部落格

CCNA51~100題解析

( ) 51.Which two of the addresses below are available for host addresses on the subnet 202.168.11.20/28?(Select two answer choices)

A.202.168.11.17

B.202.168.11.14

C.202.168.11.29

D.202.168.11.16

E.202.168.11.31

F.202.168.11.44

51.下列哪兩個位址是可以用在子網路上所使用的主機位址202.168.11.20/28?(選擇2個答案)

A.202.168.11.17

B.202.168.11.14

C.202.168.11.29

D.202.168.11.16

E.202.168.11.31

F.202.168.11.44

相關資料:http://ccnatiy.blogspot.tw/2014/12/blog-post.html

ANS(A、C)

( ) 52.The Magic network has a Class C IP network and has been divided into 5 separate departments located at different places. Which subnet mask will match up your design?

A.255.255.255.0

B.255.255.255.192

C.255.255.255.224

D.255.255.255.240

E.255.255.255.248

F.255.255.255.252

52.有個”魔法”網路擁有C級的IP網路並想劃分為5個網段給不同地方的部門使用，下列哪一個子網路遮罩適合你的設計?

A.255.255.255.0

B.255.255.255.192

C.255.255.255.224

D.255.255.255.240

E.255.255.255.248

F.255.255.255.252

C級網路的遮罩為255.255.255.0=/24
要分割五個網段就要用2^3=8
所以24+3=27
/27=255.255.255.224

ANS(C)

( ) 53.Which followings are the default subnet mask for an IP network?(choose2)

A.All the node bits are zero

B.All the network bits are zero

C.All the node bits are one

D.All the network bits are one

53.在IP網路中，默認的子網路遮罩是下列哪些選項?(選擇2個)

A.主機位元全部是0

B.網路位元全部是0

C.主機位元全部是1

D.網路位元全部是1

遮罩的形式為
255.255.255.0
11111111 . 11111111 . 11111111 . 00000000
網路位元+主機位元

ANS(A、D)

( ) 54.What will the source and destination hosts exchange first when TCP connection established?

A.initial sequence number

B.port number

C.reply number

D.windows flow control

54.當來源跟目的主機第一次建立TCP連結時會?

A.initial sequence number

B.port number

C.reply number

D.windows flow control

ANS(A)

( ) 55.Which one of following is a reply message by a successful ping command?

A.Time reply

B.Echo reply

C.message reply

D. Time out reply

55.下列哪個選項是ping指令成功時所回覆的訊息?

A.Time reply

B.Echo reply

C.message reply

D. Time out reply

ANS(B)

( ) 56.Which command will you use to set the IP address format to hexadecimal?

A.Taipei>IP netmask-format hexadecimal

B.Taipei#IP netmask-format hexadecimal

C.Taipei#term IP netmask-format hexadecimal

D.Taipei[config-if]term IP netmask-format hexadecimal

56.哪一個指令使用後會設定IP位址的格式為十六進制?

A.Taipei>IP netmask-format hexadecimal

B.Taipei#IP netmask-format hexadecimal

C.Taipei#term IP netmask-format hexadecimal

D.Taipei[config-if]term IP netmask-format hexadecimal

ANS(C)

( ) 57.What is the default subnet mask of a Class C network?

A.255.0.0.0

B.255.255.255.255

C.255.255.0.0

D. 255.255.255.0

57.C級網路的默認子網路遮罩是哪一個?

A.255.0.0.0

B.255.255.255.255

C.255.255.0.0

D. 255.255.255.0

ANS(D)

( ) 58.Which port number is used by DNS?

A.100

B.69

C.53

D.25

E.21

58.下列哪一個埠號是DNS所使用?

A.100

B.69

C.53

D.25

E.21

ANS(C)

( ) 59.Which one of following does TCP use to identify the upper layer protocol

A.IP address

B.port number

C.Sequence number

D.flage

59.TCP是使用下列者來決定上層協定?

A.IP address

B.port number

C.Sequence number

D.flage

ANS(B)

( ) 60.How many bits are you used to decide a Class A address?

A.7 bits

B.8 bits

C.16 bits

D.24 bits

E.1 bits

60.多少位元組是用來決定A級網路?

A.7 bits

B.8 bits

C.16 bits

D.24 bits

E.1 bits

A級網路是1~126因為第一個位元為0所以剩下7個來決定0XXXXXXX

ANS(A)

() 61.Which command will you use to display the last reachable router in the network?

A.FTP

B.Ping

C.Trace

D.Telnet

61.下列哪個指令可以顯示在網路上最後到達的路由器?

A.FTP

B.Ping

C.Trace

D.Telnet

ANS(C)

( ) 62.You have an IP address 130.30.30.30, what’s the class of the IP address?

A.Class A

B.Class B

C.Class C

D.Class D

E.Class E

62.你用有IP位址130.30.30.30，請問這個IP位址屬於哪個級別?
A.Class A
B.Class B
C.Class C
D.Class D
E.Class E

ANS(B)

( ) 63.Which default port will you set to the SNMP?

A.23

B.25

C.161

D.53

E.21

63.下列何者是SNMP預設的埠號?
A.23
B.25
C.161
D.53
E.21

ANS(C)

( ) 64.How many possible hosts will you have a whole Class B network?

A.256

B.1024

C.4094

D.65534

E.65536

64.請問B級網路有多少可使用的主機?
A.256
B.1024
C.4094
D.65534
E.65536

ANS(D)

( ) 65.Your network uses the 162.12.0.0 class B address. Which of the subnet masks below will allow for 100 subnets with 490 usable host addresses per subnet?

A.255.255.255.254

B.255.255.224.0

C.255.255.254.0

D.255.255.255.0

E.255.255.255.128

65.你的網路使用162.12.0.0 B級位址。下面哪一個子網路遮罩允許有100個子網路和每個子網路有490個可使用主機位址?
A.255.255.255.254
B.255.255.224.0
C.255.255.254.0
D.255.255.255.0
E.255.255.255.128

B級網路的遮罩為255.255.0.0(/16)
要切割為100個網段至少要2^7才有可能所以16+7=23
/23=255.255.254.0

ANS(C)

( ) 66.You have an IP network 180.80.0.0. You want to have the greatest number of subnet and each subnet has at least 120 hosts, what subnet mask will you use?

A.255.0.0.0

B.255.255.255.0

C.255.255.255.128

D.255.255.255.240

E.255.255.255.255

66.你擁有網路IP 180.80.0.0. 你想要擁有最多的子網路數量而且每個子網路最少要有120台主機，你將使用哪一個子網路遮罩?
A.255.0.0.0
B.255.255.255.0
C.255.255.255.128
D.255.255.255.240
E.255.255.255.255

120台主機需要2^7也就是7個主機位元16-7=9所以9+16=25所以/25=255.255.255.128

ANS(C)

( ) 67.You found that following configuration command was entered into a router:ip route 202.16.10.0 255.255.255.0 202.168.20.5 Which two of the following statements are true regarding this configuration change?

A.The command is used to establish a static route.

B.The default administrative distance is used.

C.The command is used to establish a sub network.

D.The subnet mask for the source address is 255.255.255.0

E.The command is used to configure the router interfaces.

67.你認為下面的組態命令進入路由器ip route 202.16.10.0 255.255.255.0 202.168.20.5 下列哪兩個敘述是正確的關於這個組態的變化?
A.這個指令是在建立靜態路由
B.默認的管理距離會被使用
C.這個指令是在建立子網路
D.子網路遮罩的來源位址是255.255.255.0
E.這個指令所使用的組態是路由介面

ANS(A、B)

( ) 68.Which two of the commands can you use to configure a default route?

A.TAIPEI(config-interface)#ip route 202.168.100.255 0.0.0.0 202.168.12.2

B.TAIPEI(config)#ip router 0.0.0.0 255.255.255.255 S0

C.TAIPEI(config)#ip router 0.0.0.0 0.0.0.0 E0

D.TAIPEI(config)#ip router 0.0.0.0 0.0.0.0 202.168.100.11

E. TAIPEI(config)#ip router 0.0.0.0 202.168.1.2 255.255.255.255

F. TAIPEI#ip default-network 0.0.0.0 202.168.1.2 255.255.255.255

68.下列哪兩個指令可以讓你使用預設路由?
A.TAIPEI(config-interface)#ip route 202.168.100.255 0.0.0.0 202.168.12.2
B.TAIPEI(config)#ip router 0.0.0.0 255.255.255.255 S0
C.TAIPEI(config)#ip router 0.0.0.0 0.0.0.0 E0
D.TAIPEI(config)#ip router 0.0.0.0 0.0.0.0 202.168.100.11
E. TAIPEI(config)#ip router 0.0.0.0 202.168.1.2 255.255.255.255
F. TAIPEI#ip default-network 0.0.0.0 202.168.1.2 255.255.255.255

ip route 0.0.0.0 0.0.0.0 介面OR介面IP

ANS(C、D)

( ) 69.What the range of first value for a Class E IP address?

A.1~126

B.128~191

C.192~223

D.224~239

E.240~255

69.下列哪一個選項的值的範圍是屬於E級IP位址?
A.1~126
B.128~191
C.192~223
D.224~239
E.240~255

ANS(E)

( ) 70.You are an administrator and you are configuring a Cisco router. You want to configure the IP address on an interface. Which one of following command will you use?

A.router(config-if)# ip address 202.168.100.1 subnet mask /28

B.router(config-if)# 202.168.100.1 0.0.55.255

C.router(config-if)# ip address 202.168.100.1 255.255.255.0

D.router(config-if)# 202.168.100.1 subnet mask 255.255.255.0

E.router(config-if)# ip address 202.168.100.1 0.0.55.255

F.router(config-if)# ip address 202.168.100.1 subnet mask 255.255.255.0

70.你是一位管理員你要配置一台思科路由器。你想要配置IP位址給一個介面。你將會用到下列哪一個指令?
A.router(config-if)# ip address 202.168.100.1 subnet mask /28
B.router(config-if)# 202.168.100.1 0.0.55.255
C.router(config-if)# ip address 202.168.100.1 255.255.255.0
D.router(config-if)# 202.168.100.1 subnet mask 255.255.255.0
E.router(config-if)# ip address 202.168.100.1 0.0.55.255
F.router(config-if)# ip address 202.168.100.1 subnet mask 255.255.255.0

設定IP指令為IP address x.x.x.x(ip) x.x.x.x(遮罩)

ANS(C)

( ) 71.Which two of following will a source host receive,when ping command reaches unsuccessful

A.Echo reply

B.Error reply

C.Destination Unreachable

D.Echo Ping

E.Time Exceeded

71.當Ping指令不成功時，哪兩個選項會被來源主機接收?
A.Echo reply
B.Error reply
C.Destination Unreachable
D.Echo Ping
E.Time Exceeded

ANS(C、E)

( ) 72.Which one of following is used by tftp to assure reliability?

A.sequence number

B.port number

C.flow control

D.checksums

E.echo reply

72.下列何者用來確保tftp的可靠性?
A.sequence number
B.port number
C.flow control
D.checksums
E.echo reply

ANS(D)

( ) 73.Which command will you use to test connections between application layer?

A.ARP

B.FTP

C.Ping

D.Telnet

E.Trace

73.哪一個測試應用層之間的連結指令?
A.ARP
B.FTP
C.Ping
D.Telnet
E.Trace

ANS(D)

( ) 74.Which port number is used by ftp?

A.21

B.25

C.23

D.161

E.520

74.哪一個埠號被ftp使用?
A.21
B.25
C.23
D.161
E.520

ANS(A)

( ) 75.Which one of following can ICMP message use to avoid loop packet?

A.Echo

B.Echo reply

C.Address reply

D.Time exceeded

E.Timestamp

75.在ICMP的訊息中被用來避免迴圈封包的是下列何者?
A.Echo
B.Echo reply
C.Address reply
D.Time exceeded
E.Timestamp

ANS(D)

( ) 76.How does UDP support many communications at the same time?

A.version number

B.sequence number

C.port number

D.urgent

E.options

76.UDP在同一時間內可以支援建立許多連結的方法是?
A.version number
B.sequence number
C.port number
D.urgent
E.options

ANS(C)

( ) 77.How many subnets and hosts per subnet are available when you apply a /28 mask to the 202.10.20.0 class C network?

A.30 network and 6 hosts

B.6 network and 30 hosts

C.8 network and 32 hosts

D.32 network and 8 hosts

E.14 network and 14 hosts

F. 62 network and 2 hosts

77.當你採用 /28遮罩給 202.10.20.0 C級網路時，每個子網路會有多少個可使用的子網路和主機?
A.30 network and 6 hosts
B.6 network and 30 hosts
C.8 network and 32 hosts
D.32 network and 8 hosts
E.14 network and 14 hosts
F. 62 network and 2 hosts

ANS(E)

( ) 78.Which port number is used by SMTP?

A.25

B.53

C.69

D.161

E.520

78.哪一個埠號被SMTP使用?
A.25
B.53
C.69
D.161
E.520

ANS(A)

( ) 79.Which class of IP address has fewest valid hosts address?

A.Class B

B.Class A

C.Class D

D.Class E

E.Class C

79.哪一個級別的IP位址擁有最少有效的主機位址?
A.Class B
B.Class A
C.Class D
D.Class E
E.Class C

ANS(E)

( ) 80.Which followings are Transport layer protocol?(choose2)

A.SMTP

B.TCP

C.ICMP

D.SQL

E.SPX

F.Telnet

80.下列哪兩個是傳輸層的協定?
A.SMTP
B.TCP
C.ICMP
D.SQL
E.SPX

F.Telnet

ANS(B、E)

( ) 81.Which followings will you use for 14 hosts of a subnet on network 203.66.47.0?(choose2)

A.203.66.47.0/28

B.203.66.47.0/27

C.203.66.47.0 255.255.255.124

D.203.66.47.0 255.255.255.240

E.203.66.47.0 255.255.255.248

F.203.66.47.0/29

81.下列哪一個網路的子網路有14個主機203.66.47.0?(選2個答案)
A.203.66.47.0/28
B.203.66.47.0/27
C.203.66.47.0 255.255.255.124
D.203.66.47.0 255.255.255.240
E.203.66.47.0 255.255.255.248
F.203.66.47.0/29

ANS(A、D)

( ) 82.You have a Class C network and you need ten subnets. You wish to have as many address available for hosts as possible . Which one of the following subnet masks should you use?

A.255.255.255.192

B.255.255.255.224

C.255.255.255.240

D.255.255.255.248

82.你擁有一個C級網路而且你需要十個子網路。你希望擁有最多的可使用主機位址。你會使用下列哪一個子網路遮罩?
A.255.255.255.192
B.255.255.255.224
C.255.255.255.240
D.255.255.255.248

ANS(C)

( ) 83.What does the IP range 172.16.0.0~172.31.0.0 use for?

A.public address

B.private address

C.multicast address

D.Broadcast address

83.IP範圍172.16.0.0~172.31.0.0的用途是什麼?
A.公共位址
B.私有位址
C.群播位址
D.廣播位址

ANS(B)

( ) 84.Which followings does TCP provide(choose3)

A.Discover a path

B.Determine a path

C.Connection oriented

D.Flow control

E.Error checking

F.Transfer file

84.下列何者是TCP所提供?(選擇3個答案)
A.發現路徑
B.確定路徑
C.連結導向
D.流量控制
E.錯誤檢查
F.傳輸文件

ANS(C、D、E)

( ) 85.Which followings of class are valid on the internet?

A.Class A、B、C

B.Class B、C、D

C.Class C、D、E

D.Class D、E、A

85.下列的級別那些網路上是有效的?
A.Class A、B、C
B.Class B、C、D
C.Class C、D、E
D.Class D、E、A

ANS(A)

( ) 86.Which followings are used by ICMP?(choose2)

A.FTP

B.Telnet

C.Ping

D.PPTP

E.Traceroute

86.下面那些有使用到ICMP?(選擇2個答案)
A.FTP
B.Telnet
C.Ping
D.PPTP
E.Traceroute

ANS(C、E)

( ) 87.Which three of the following are the features of UDP?

A.Reliable

B.Unreliable

C.Connection oriented

D.Connectionless

E.Use acknowledgements

F.Use no acknowledgements

87.哪三樣是UDP的特點?
A.可靠
B.不可靠
C.連結導向
D.非連結導向
E.使用回應
F.使用無回應

ANS(B、D、F)

( ) 88.Which one of protocol resolves a MAC address to an IP address?

A.FTP

B.TCP

C.ARP

D.RARP

E.DNS

88.哪一個協定是用來解析實體位址變成IP位址?
A.FTP
B.TCP
C.ARP
D.RARP
E.DNS

ANS(D)

( ) 89.Which layer will ICMP occurs at?

A.Application layer

B.Presentation layer

C.Data link layer

D.Network layer

E.Transport layer

89.在哪一層會發現ICMP?
A.實體層
B.表示層
C.資料鏈結層
D.網路層
E.傳輸層

ANS(D)

( ) 90.Which one of protocol resolves an IP address to a MAC address?

A.SMTP

B.DNS

C.ARP

D.RARP

E.FTP

90.哪一個協定解析IP位址變成實體位址?
A.SMTP
B.DNS
C.ARP
D.RARP
E.FTP

ANS(C)

( ) 91.Which one of following provides connectionless delivery of packet (datagram)?

A.TCP

B.IP

C.ICMP

D.ARP

91.下列何者提供非連結導向的封包傳輸?
A.TCP
B.IP
C.ICMP
D.ARP

ANS(B)

( ) 92.You have 6 bits to define subnets of a B class. How many hosts will you have on your network?

A.65536

B.65534

C.63364

D.36000

92.你在一個B級網路裡有6個位元定義為子網路。哪你用有多少的主機位址在網路上?
A.65536
B.65534
C.63364
D.36000

ANS(C)

( ) 93.Which one of following ICMP message type will get a network address?

A.Information Request

B.Information Reply

C.Echo

D.Echo Request

93.下列哪一個選項是ICMP訊息形態中取得網路位址?
A.Information Request
B.Information Reply
C.Echo
D.Echo Request

ANS(A)

( ) 94.Which command will you use to test connection at the network layer?

A.SQL

B.NFS

C.Telnet

D.Ping

E.Show

94.哪一個指令是用來測試網路層的連結?
A.SQL
B.NFS
C.Telnet
D.Ping
E.Show

ANS(D)

( ) 95.Which port numbers of TCP/UDP dynamically assigned by application?

A.Port number 256

B.Port number below 256

C.Port number 256~1023

D.Port number above 1023

95.在TCP/UDP的那些埠號是由應用層動態分配?
A.Port number 256
B.Port number below 256
C.Port number 256~1023
D.Port number above 1023

ANS(D)

( ) 96.Which port number is used by TFTP?

A.25

B.53

C.69

D.21

E.161

96.哪一個埠號被TFTP使用?
A.25
B.53
C.69
D.21
E.161

ANS(C)

( ) 97.Which one of protocol provides message control of TCP/IP?

A.TCP

B.IP

C.ARP

D.RARP

E.ICMP

97.哪一個協定在TCP/IP中負責提供訊息控制?
A.TCP
B.IP
C.ARP
D.RARP
E.ICMP

ANS(E)

( ) 98.You have an IP address 191.91.91.91 What’s the class of this IP address?

A.Class D

B.Class E

C.Class A

D.Class B

E.Class C

98.你有一個IP位址191.91.91.91。請問這個IP位址是屬於哪個級別?
A.Class D
B.Class E
C.Class A
D.Class B
E.Class C

ANS(D)

( ) 99.What is the subnet for the host IP address 160.32.210.0/22?

A.160.32.42.0

B.160.32.107.0

C.160.32.208.0

D.160.32.252.0

E.160.32.254.0

F.None of the above

99.請問主機位址 160.32.21.0/22是屬於哪一個子網路?
A.160.32.42.0
B.160.32.107.0
C.160.32.208.0
D.160.32.252.0
E.160.32.254.0
F.None of the above

ANS(C)

( ) 100.You want to use 11 bits to set the subnets of a Class B. How many hosts will you on each subnet?

A.254

B.30

C.126

D.62

E.14

100.你想要使用11個位元在B級網路內設置子網路。請問每個子網路將會有多少的主機?
A.254
B.30
C.126
D.62

E.14

ANS(B)

文章轉載http://ccnatiy.blogspot.tw/2014/10/ccna51100_19.ht...

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