ENetwork Chapter 6 - CCNA Exploration (Version 4.0)

本文包含了一系列关于CCNA网络配置的评估题目及答案解析,涵盖了子网划分、IP地址分配、路由选择等关键技术知识点。

Exam Viewer - ENetwork Chapter 6 - CCNA Exploration (Version 4.0) 
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Below you will find the assessment items as presented on the exam as well as the scoring rules associated with the item.

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1

Refer to the exhibit. Which network prefix will work with the IP addressing scheme shown in the graphic. 
 
 /24  
 =/16  
 /20  
 =/27  
 /25  
 /28  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 4
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.5.2 Subnetting - Dividing Networks into Right Sizes 
 

2 Which IPv4 subnetted addresses represent valid host addresses? (Choose three.) 
 
 172.16.4.127 /26  
 =172.16.4.155 /26  
 =172.16.4.193 /26  
 172.16.4.95 /27  
 172.16.4.159 /27  
 =172.16.4.207 /27  
 

 

Scoring Rule For:  correctness of response 
Option 2, Option 3, and Option 6 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 3 
 

This item references content from the following areas: 
CCNA Exploration 
6.2.1 Types of Addresses in an IPv4 Network 
 

3 Which statements are true regarding IP addressing? (Choose two.) 
 
 NAT translates public addresses to private addresses destined for the Internet.  
 Only one company is allowed to use a specific private network address space.  
 =Private addresses are blocked from public Internet by router.  
 Network 172.32.0.0 is part of the private address space.  
 =IP address 127.0.0.1 can be used for a host to direct traffic to itself.  
 

 

Scoring Rule For:  correctness of response 
Option 3 and Option 5 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.2.6 Special IPv4 Addresses 
 

4 Which process do routers use to determine the subnet network address based upon a given IP address and subnet mask? 
 
 binary adding  
 hexadecimal anding  
 binary division  
 binary multiplication  
 =binary ANDing  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 5
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.4.2 ANDing - What Is In Our Network? 
 

5

Refer to the exhibit. Host A is connected to the LAN, but it cannot get access to any resources on the Internet. The configuration of the host is shown in the exhibit. What could be the cause of the problem? 
 
 The host subnet mask is incorrect.  
 The default gateway is a network address.  
 The default gateway is a broadcast address.  
 =The default gateway is on a different subnet from the host.  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 4
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.2.2 Calculating Network, Hosts and Broadcast Addresses 
 

6 What subnet mask would a network administrator assign to a network address of 172.30.1.0 if it were possible to have up to 254 hosts? 
 
 255.255.0.0  
 =255.255.255.0  
 255.255.254.0  
 255.255.248.0  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 2
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.4.1 The Subnet Mask - Defining the Network and Host Portions 
 

7 Which three IP addresses are private? (Choose three.) 
 
 172.168.33.1  
 =10.35.66.70  
 =192.168.99.5  
 =172.18.88.90  
 192.33.55.89  
 172.35.16.5  
 

 

Scoring Rule For:  correctness of response 
Option 2, Option 3, and Option 4 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 3 
 

This item references content from the following areas: 
CCNA Exploration 
6.2.5 Public and Private Addresses 
 

8 Given the IP address and subnet mask of 172.16.134.64 255.255.255.224, which of the following would describe this address? 
 
 This is a useable host address.  
 This is a broadcast address.  
 =This is a network address.  
 This is not a valid address.  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 3
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.2.2 Calculating Network, Hosts and Broadcast Addresses 
 

9 A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong? 
 
 172.16.0.0  
 172.16.192.0  
 172.16.192.128  
 =172.16.192.160  
 172.16.192.168  
 172.16.192.176  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 4
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.4.2 ANDing - What Is In Our Network? 
 

10

Refer to the exhibit. The network administrator has assigned the internetwork of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 mask. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the workgroup server's properties to allow connectivity to the network? 
 
 IP address: 192.168.10.38 subnet mask: 255.255.255.240 default gateway: 192.168.10.39  
 IP address: 192.168.10.38 subnet mask: 255.255.255.240 default gateway: 192.168.10.33  
 =IP address: 192.168.10.38 subnet mask: 255.255.255.248 default gateway: 192.168.10.33  
 IP address: 192.168.10.39 subnet mask: 255.255.255.248 default gateway: 192.168.10.31  
 IP address: 192.168.10.254 subnet mask: 255.255.255.0 default gateway: 192.168.10.1  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 3
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.5.2 Subnetting - Dividing Networks into Right Sizes 
 

11 Which of the following network devices are recommended to be assigned static IP addresses? (Choose three.) 
 
 LAN workstations  
 =servers  
 =network printers  
 =routers  
 remote workstations  
 laptops  
 

 

Scoring Rule For:  correctness of response 
Option 2, Option 3, and Option 4 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 3 
 

This item references content from the following areas: 
CCNA Exploration 
6.3.3 Assigning Addresses to Other Devices 
 

12 Which of the following are features of IPv6? (Choose three.) 
 
 =larger address space  
 faster routing protocols  
 =data types and classes of service  
 =authentication and encryption  
 improved host naming conventions  
 same addressing scheme as IPv4  
 

 

Scoring Rule For:  correctness of response 
Option 1, Option 3, and Option 4 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 3 
 

This item references content from the following areas: 
CCNA Exploration 
6.3.6 Overview of IPv6 
 

13 What is the primary reason for development of IPv6? 
 
 security  
 header format simplification  
 =expanded addressing capabilities  
 addressing simplification  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 3
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.3.6 Overview of IPv6 
 

14 What two things will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away? (Choose two.) 
 
 =The router will discard the packet.  
 The router will decrement the TTL value and forward the packet to the next router on the path to the destination host.  
 =The router will send a time exceeded message to the source host.  
 The router will increment the TTL value and forward the packet to the next router on the path to the destination host.  
 The router will send an ICMP Redirect Message to the source host.  
 

 

Scoring Rule For:  correctness of response 
Option 1 and Option 3 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.6.5 ICMPv4 - The Protocol Supporting Testing and Messaging 
 

15

Refer to the exhibit. Why would the response shown be displayed after issuing the command ping 127.0.0.1 on a PC? 
 
 The IP settings are not properly configured on the host.  
 =Internet Protocol is not properly installed on the host.  
 There is a problem at the physical or data link layer.  
 The default gateway device is not operating.  
 A router on the path to the destination host has gone down.  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 2
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.6.1 Ping 127.0.0.1 - Testing the Local Stack 
 

16 How many bits make up an IPv4 address? 
 
 128  
 64  
 48  
 =32  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 4
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.1.1 The Anatomy of an IPv4 Address 
 

17

Refer to the exhibit. A network administrator discovers that host A is having trouble with Internet connectivity, but the server farm has full connectivity. In addition, host A has full connectivity to the server farm. What is a possible cause of this problem? 
 
 The router has an incorrect gateway.  
 Host A has an overlapping network address.  
 Host A has an incorrect default gateway configured.  
 Host A has an incorrect subnet mask.  
 =NAT is required for the host A network.  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 5
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.3.1 Planning to Address the Network 
 

18 What three facts are true about the network portion of an IPv4 address? (Choose three.) 
 
 identifies an individual device  
 =is identical for all hosts in a broadcast domain  
 is altered as packet is forwarded  
 =varies in length  
 =is used to forward packets  
 uses flat addressing  
 

 

Scoring Rule For:  correctness of response 
Option 2, Option 4, and Option 5 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 3 
 

This item references content from the following areas: 
CCNA Exploration 
6.2.1 Types of Addresses in an IPv4 Network 
6.4.2 ANDing - What Is In Our Network? 
 

19 What is a group of hosts called that have identical bit patterns in the high order bits of their addresses? 
 
 an internet  
 =a network  
 an octet  
 a radix  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 2
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.1.1 The Anatomy of an IPv4 Address 
 

20 What is the network address of the host 172.25.67.99 /23 in binary? 
 
 10101100. 00011001.01000011.00000000  
 10101100. 00011001.01000011.11111111  
 =10101100. 00011001.01000010.00000000  
 10101100. 00011001.01000010.01100011  
 10101100. 00010001.01000011. 01100010  
 10101100. 00011001.00000000.00000000  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 3
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.4.2 ANDing - What Is In Our Network? 
 

21

Refer to the exhibit. A network administrator has to develop an IP addressing scheme that uses the 192.168.1.0 /24 address space. The network that contains the serial link has already been addressed out of a separate range. Each network will be allocated the same number of host addresses. Which network mask will be appropriate to address the remaining networks?
 
 255.255.255.248  
 255.255.255.224  
 =255.255.255.192  
 255.255.255.240  
 255.255.255.128  
 255.255.255.252  
 

 

Scoring Rule For:  correctness of response 
2 points for Option 3
0 points for any other option  
Max Value = 2 
 

This item references content from the following areas: 
CCNA Exploration 
6.3.3 Assigning Addresses to Other Devices 
 

  
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