CCNA51~100題

( ) 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

( ) 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

( ) 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

( ) 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

( ) 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

( ) 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

( ) 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

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

           A.100

           B.69

           C.53

           D.25

           E.21

( ) 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

( ) 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

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

           A.FTP

           B.Ping

           C.Trace

           D.Telnet

( ) 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

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

           A.23

           B.25

           C.161

           D.53

           E.21

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

           A.256

           B.1024

           C.4094

           D.65534

           E.65536

( ) 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

( ) 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

( ) 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 sddress is 255.255.255.0

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

( ) 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

( ) 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

( ) 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

( ) 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

( ) 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

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

           A.ARP

           B.FTP

           C.Ping

           D.Telnet

           E.Trace

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

           A.21

           B.25

           C.23

           D.161

           E.520

( ) 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

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

           A.version number

           B.sequence number

           C.port number

           D.urgent

           E.options

( ) 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

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

           A.25

           B.53

           C.69

           D.161

           E.520

( ) 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

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

           A.SMTP

           B.TCP

           C.ICMP

           D.SQL

           E.SPX

           F.Telnet

( ) 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

( ) 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

( ) 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

( ) 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

( ) 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

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

           A.FTP

           B.Telnet

           C.Ping

           D.PPTP

           E.Traceroute

( ) 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

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

           A.FTP

           B.TCP

           C.ARP

           D.RARP

           E.DNS

( ) 89.Which layer will ICMP occurs at?

           A.Application layer

           B.Presentation layer

           C.Data link layer

           D.Network layer

           E.Transport layer

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

           A.SMTP

           B.DNS

           C.ARP

           D.RARP

           E.FTP

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

           A.TCP

           B.IP

           C.ICMP

           D.ARP

( ) 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

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

           A.Information Request

           B.Information Reply

           C.Echo

           D.Echo Request

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

           A.SQL

           B.NFS

           C.Telnet

           D.Ping

           E.Show

( ) 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

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

           A.25

           B.53

           C.69

           D.21

           E.161

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

           A.TCP

           B.IP

           C.ARP

           D.RARP

           E.ICMP

( ) 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

( ) 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

( ) 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