思科认证考试

How many addresses for hosts will the network 124.12.4.0/22 provide?（）A、510B、1022C、1024D、2048

题目

How many addresses for hosts will the network 124.12.4.0/22 provide?（）

  • A、510
  • B、1022
  • C、1024
  • D、2048
参考答案和解析
正确答案:B
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相似问题和答案

第1题：

The IP network 210.106.14.0 is subnetted using a /24 mask. How many usable networks and host addresses can be obtained from this?

A．1 network with 254 hosts

B．4 networks with 128 hosts

C．2 networks with 24 hosts

D．6 networks with 64 hosts

E．8 networks with 36 hosts


正确答案：A
解析：Explanation:Asubnetwith24bitsonwouldbe255.255.255.0.SincethisisaclassCnetwork,thissubnetcanhaveonly1networkand254usablehosts.

第2题：

How many subnets can be gained by subnetting 172.17.32.0／23 into a ／27 mask, and how many usable host addresses will there be per subnet?()

A. 8 subnets, 31 hosts

B. 8 subnets, 32 hosts

C. 16 subnets, 30 hosts

D. 16 subnets, 32 hosts

E. A Class B address can‘t be subnetted into the fourth octet.


参考答案：C

第3题：

How many usable IP addresses can you get from a conventional Class C address?

A．128

B．192

C．254

D．256

E．510


正确答案：C
解析：Explanation:
Class Caddresses range from 192.0.0.0 through 223.225.225.225 and default subnet maskof 255.255.255.0. In Class C addresses, the first 24 bits are used as for the network IDwhile only the last 8 bits is used for the host ID. Using the 2n-2 formula, we can calculate that Class C addresses can support a maximum of 254 (28-2) hosts.

Incorrect Answers:
D. Note that the question asked for the number of usable addresses, and not the total number of all addresses. We must subtract 2 for the network and broadcast addresses to calculate the number of usable addresses in any subnet.

第4题：

The IP network 210.106.14.0 is subnetted using a /24 mask. How many usable networks and host addresses can be obtained from this?（）

  • A、1 network with 254 hosts
  • B、4 networks with 128 hosts
  • C、2 networks with 24 hosts
  • D、6 networks with 64 hosts
  • E、8 networks with 36 hosts

正确答案:A

第5题：

How many IP addresses can be configured in a given interface?（）

  • A、one primary and one secondary IP address
  • B、one IP address
  • C、as many IP addresses as you want
  • D、one primary and multiple secondary IP addresses

正确答案:C

第6题：

How many usable sub network and usable hosts per subnet result in the network address 201.105.13.0 is sub netted with a mask of ／26? ()

A. 64 network and 4 hosts

B. 4 network and 64 hosts

C. 2 network and 62 hosts

D. 62 network and 2 hosts


参考答案：C

第7题：

How does a DHCP server dynamically assign IP addresses to hosts?()

A.Addresses are permanently assigned so that the host uses the same address at all times.

B.Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.

C.Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.

D.Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.


参考答案：C

第8题：

You need subnet a Ezonexam network segment. How many subnetworks and hosts are available per subnet if you apply a /28 mask to the 210.10.2.0 class C network?

A. 30 networks and 6 hosts.

B. 6 networks and 30 hosts.

C. 8 networks and 32 hosts.

D. 32 networks and 18 hosts.

E. 16 networks and 14 hosts.

F. None of the above


正确答案：E
E 解析：Explanation:
A 28 bit subnet mask (11111111.11111111.11111111.11110000) applied to a class C network uses a 4 bits for networks, and leaves 4 bits for hosts. Using the 2n-2 formula, we have 24-2 (or 2x2x2x2-2) which gives us 14 for the number of hosts, and the number of networks is 24 = 16.

Incorrect Answers:
A. This would be the result of a /29 (255.255.255.248) network.

B. This would be the result of a /27 (255.255.255.224) network.

C. This is not possible, as we must subtract two from the subnets and hosts for the network and broadcast addresses.

D. This is not a possible combination of networks and hosts.

第9题：

How does a DHCP server dynamically assign IP addresses to hosts?（）

  • A、Addresses are permanently assigned so that the host uses the same address at all times.
  • B、Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.
  • C、Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.
  • D、Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.

正确答案:C

第10题：

How many subnetworks and hosts are available per subnet if you apply a /28 mask to the 210.10.2.0 class C network?（）

  • A、30 networks and 6 hosts.
  • B、6 networks and 30 hosts.
  • C、8 networks and 32 hosts.
  • D、32 networks and 18 hosts.
  • E、14 networks and 14 hosts.
  • F、None of the above

正确答案:E

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