思科认证考试试题(笔试)

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思科认证考试试题(笔试)

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思科认证考试试题(笔试)

　　1: your junior network administrator wants to know what the default subnet mask is for a class c ip address. what do you tell him?

　　a. 255.0.0.0]6l

　　b. 255.255.0.0

　　c. 255.245.255.0

　　d. 255.255.255.0

　　e. 255.255.255.255

　　2: an application needs to have reliable, end-to-end connect-ivity. which of the following protocols will give you reliable connectivity?

　　a. tcp

　　b. udp

　　c. ip

　　d. icmp

　　3: you are designing a network, which needs to support 55 users. you don't plan to extend the segment beyond the current number of users. which subnet mask would best meet your needs?

　　a. 255.255.0.0

　　b. 255.255.255.0

　　c. 255.255.255.192

　　d. 255.255.255.160

　　4: you have added a new switch to your network. you want to manage it remotely, so you need to assign it an ip address. your router that connects to the switch has an ip address of 172.16.12.33/27. which of the following addresses can you assign to this switch?

　　a. 172.16.12.33/28

　　b. 172.16.12.32/27

　　c. 172.16.12.33/27

　　d. 172.16.12.34/27

　　e. 172.16.12.35/28

　　f. 172.16.12.38/28

　　g. 172.16.12.63/27

　　5: the address 172.16.208.16/20 is a host address in which of the following subnets?

　　a. 172.16.176.0–255.255.240.0

　　b. 172.16.192.0–255.255.240.0

　　c. 172.16.208.0–255.255.240.0

　　d. 172.16.224.0–255.255.240.0

　　6: your organization is using the 192.168.1.0/24 address space. you need 28 subnets. what subnet mask would you use to create these subnets?

　　a. 255.255.255.0

　　b. 255.255.255.128

　　c. 255.255.255.192

　　d. 255.255.255.224

　　e. 255.255.255.240

　　f. 255.255.255.248

　　7: which of the following protocols maps ip addresses to mac addresses for connectivity to occur between two hosts?

　　a. arp

　　b. rarp

　　c. slarp

　　d. dhcp

　　8: your junior network administrator cannot seem to ping a host in another network and asks you why it isn't working. which of the following is not an answer that you would give him?

　　a. the host's default gateway is down.

　　b. the destination host is not powered on.

　　c. the ip address of the router interface is incorrect.

　　d. the ip address of the switch to which the destination host connects is incorrect.

　　e. the host is in a different subnet.

　　9: which of the following classes of ip addresses is utilized for multicasting?

　　a. class a

　　b. class b

　　c. class c

　　d. class d

　　10: you give your it department a spreadsheet of ip addresses and their subnets. you receive a call from one of the junior techs asking what the /26 means next to the ip addresses. you tell her:

　　a. it represents the number of hosts possible on that subnetwork.

　　b. it represents the number of subnetworks that are being used.

　　c. it represents the class of ip address being used.

　　d. it represents the number of bits in the subnet mask that are

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