CCNA Discovery 4 Chapter 6 V4.0 Answers

1.

What are the broadcast addresses for each subnet

Refer to the exhibit. What are the broadcast addresses for each subnet?

• Admin – 172.16.31.0
QA – 172.16.1.127
Development – 172.16.2.255
Sales – 172.16.32.255

• Admin – 172.16.31.0
Development – 172.16.2.255
QA – 172.16.1.255
Sales – 172.16.63.255

Admin – 172.16.31.255
Development – 172.16.3.255
QA – 172.16.1.127
Sales – 172.16.63.255

• Admin – 172.16.31.0
QA – 172.16.1.255
Development – 172.16.2.255
Sales – 172.16.32.255

 

2. How many bits make up an IPv6 address?

• 32

• 48

• 64

128

• 132

 

3. A network engineer researched whether there are mechanisms available to help with the transition from an IPv4 addressing structure to IPv6. What three options did the engineer find? (Choose three.)

A protocol translation mechanism allows communication between the IPv4 and IPv6 networks.

• A packet analyzer determines the addressing structure and converts it to the appropriate IPv4 or IPv6 scheme.

• New Core devices that support IPV6 must be purchased.

• A protocol converter changes IPv4 packets into IPv6 packets and vice versa.

A dual-stack network design allows both IPv4 and IPv6 addressing to be used on all network devices.

Tunneling allows IPv4 packets to be encapsulated so that they can traverse IPv6 networks and vice versa.

 

4. What is a good design practice when developing a hierarchical addressing scheme?

• Address the nodes in the Access Layer and work toward the Core Layer.

• Assign addresses to the Core devices before planning the addressing scheme for the server farm.

Determine where statically configured addressing will be implemented.

• Determine what percentage of devices are wired and what percentage of devices are wireless.

 

5.

Assuming that the default EIGRP configuration is running on both routers

Refer to the exhibit. Assuming that the default EIGRP configuration is running on both routers, which statement is true about Router A reaching the 2.2.2.0/24 network?

The no auto-summary command needs to be issued to disable automatic summarization.

• The network 2.2.2.0 command needs to be issued to ensure that Router A recognizes the 2.2.2.0 network.

• EIGRP supports VLSM and automatically recognizes the 2.2.2.0 network.

• EIGRP does not support VLSM; therefore it cannot be used with discontiguous networks

 

6.

What is the first usable IP address that can be assigned to the wgroup3 switch

Refer to the exhibit. What is the first usable IP address that can be assigned to the wgroup3 switch?

• 172.16.50.96/27

172.16.50.97/27

• 172.16.50.98/27

• 172.16.50.99/27

 

7.

Which subnet will provide sufficient addresses for the Production network with minimal waste

Refer to the exhibit. Which subnet will provide sufficient addresses for the Production network with minimal waste?

• 172.16.0.192/26

172.16.0.192/27

• 172.16.0.224/26

• 172.16.0.160/26

• 172.16.0.144/27

 

8. A network administrator is asked to design a new addressing scheme for a corporate network. Presently, there are 850 users at the head office, 220 users at sales, 425 at manufacturing, and 50 at the research site. Which statement defines the correct VLSM addressing map with minimal waste using the 172.17.0.0/16 network?

• 172.17.0.0/20 head office
172.17.1.0/21 manufacturing
172.17.1.0/22 sales
172.17.3.0/26 research

• 172.17.48.0/19 head office
172.17.16.0/20 manufacturing
172.17.48.128/25
sales 172.17.48.0/26 research

172.17.0.0/22 head office
172.17.4.0/23 manufacturing
172.17.6.0/24 sales
172.17.7.0/26 research

• 172.17.2.0/22 head office
172.17.3.0/23 manufacturing
172.17.4.0/26 sales
172.17.4.128/25 research

 

9. Which two are best practices for creating a new IP addressing scheme for a network? (Choose two.)

Plan and allow for significant growth.

• Assign addresses to the access layer before any other layer.

Plan the entire addressing scheme before assigning any addresses.

• Begin with the access layer network summary addresses and work to the edge.

• Plan the addressing scheme to meet the current minimum requirement needs.

• Implement statically assigned addresses to all hosts in the distribution layer first.

 

10. A network administrator is using the 10.0.0.0/8 network for the company. The administrator must create a masking scheme to support 750 users at the main office and 620 users at the remote office. What mask should be assigned to the 10.0.0.0/8 network to preserve the most addresses?

• 255.255.255.0

• /19

• /20

• 255.255.252.0

• /23

/21

 

11.

A company has decided to add a new workgroup

Refer to the exhibit. A company has decided to add a new workgroup. If the subnetting scheme for the network uses contiguous blocks of addresses, what subnet is assigned to hosts connected to wgroup3?

• 172.16.3.12/29

172.16.3.16/29

• 172.16.3.20/29

• 172.16.3.24/29

• 172.16.3.32/29

 

12.

The network administrator wants router RTA

Refer to the exhibit. The network administrator wants router RTA to send only the summarized route of 10.10.0.0/16 to RTC. Which configuration accomplishes this?

• RTA(config)# interface s0/0
RTA(config-if)# ip summary-address eigrp 101 10.10.0.0 255.255.0.0
RTA(config-if)# exit
RTA(config)# router eigrp 101
RTA(config-router)# no auto-summary

RTA(config)# interface s0/1
RTA(config-if)# ip summary-address eigrp 101 10.10.0.0 255.255.0.0
RTA(config-if)# exit
RTA(config)# router eigrp 101
RTA(config-router)# no auto-summary

• RTA(config)# interface s0/0
RTA(config-if)# ip summary-address eigrp 101 10.10.0.0 255.255.0.0

• RTA(config)# interface s0/1
RTA(config-if)# ip summary-address eigrp 101 10.10.0.0 255.255.0.0

 

13. Which range includes all available networks in the 192.168.8.0/21 network?

• 192.168.8.0/24 – 192.168.14.0/24

192.168.8.0/24 – 192.168.15.0/24

• 192.168.8.0/24 – 192.168.16.0/24

• 192.168.8.0/24 – 192.168.17.0/24

 

14. What best describes a discontiguous network?

• combines several classfull networking address

• contains more than one route to a destination

implements more than one routing protocol

• separated from the rest of the hierarchical group by another network

 

15.

Which set of router commands is required to turn on unequal-cost

Refer to the exhibit. Which set of router commands is required to turn on unequal-cost load sharing so that RTRA selects the path A-B-E and the lowest cost path A-C-E to the Internet?

RTRA(config)# router eigrp 1
RTRA(config-router)# variance 2

• RTRA(config)# router eigrp 1
RTRA(config-router)# variance 1

• RTRA(config)# router eigrp 1
RTRA(config-router)# maximum-paths 2

• RTRA(config)# router eigrp 1
RTRA(config-router)# maximum-paths 1

 

16. What is another format for the IPv6 address 1080:0000:0000:0000:0000:0000:1267:01A2?

1080::1267:01A2

• 1080:0:0:0:0:1267:01A2

• 1080::0:1267:01A2

• 1080:::::1267.01A2

 

17. What two advantages does CIDR provide to a network? (Choose two.)

• dynamic address assignment

• automatic route redistribution

reduced routing update traffic

easier management of summarization

• automatic summarization at classfull boundaries

 

18. An administrator is configuring IPv6 on a router. The steps that have already been completed are: 1. Activate IPv6 traffic forwarding. 2. Configure IPv6 addresses. 3. Globally configure RIPng. What is the remaining step to complete the activation of RIPng?

• Enter the ipv6 router rip name command and then use network statements to activate RIPng on the interfaces.

• Enter the ipv6 router rip name command and then specify which interfaces run RIPng, which are passive, and which only receive.

Enter the interface mode for each IPv6 interface and enable RIPng with the ipv6 ripnameenable command.

• Enter the interface mode for each IPv6 interface and enable the multicast group FF02::9, and then activate RIPng globally using the ipv6 router rip name command.

• Enter the router rip command, and then activate RIPng using the version command. RIPng then automatically runs on all IPv6 interfaces.

 

19. What is a characteristic of IPv6?

• Anycast has been substituted for unicast.

IPv6 makes use of multicasts and anycasts instead of broadcasts.

• IPv6 uses a 128 digit hexadecimal number displayed in dotted decimal format.

• Each PC in a LAN must have an IPv6 local address that is assigned by an administrator.

 

20. A company is designing a new network that will accommodate new Cisco equipment and multivendor legacy devices. The network designer has decided to select a hierarchical routing protocol that will minimize traffic from routing updates and provide fast convergence in the event of a topology change. Also, the existing IP addressing scheme requires that the selected protocol support VLSM. Which routing protocol should be chosen?

• BGP

• RIPv1

• RIPv2

OSPF

• EIGRP

 

21. With RIPv2, what should be done to avoid routing problems if a discontiguous network exists?

• Configure floating static routes on each router.

• Configure only classful masks on router interfaces.

• Instead of using RIPv2, use EIGRP with default values.

• Enter the no version 2 command in router configuration mode.

Enter the no auto-summary command in router configuration mode.

• Include subnet masks when configuring the directly connected networks.

 

22.

The IT management is adding three VLANs to the wgroup3 switch

Refer to the exhibit. The IT management is adding three VLANs to the wgroup3 switch. The current subnet will be broken down to support 14 hosts for each of the new VLANs. What will the new subnet mask be for these VLANs?

• 255.255.255.192

255.255.255.240

• 255.255.248.0

• 255.255.255.224

• 255.255.240.0

• 255.255.255.248

 

23. Which network configuration would require the use of the no auto-summary command?

• with RIP version 1, to enable subnetting on a local network

• with RIP version 2, to enable classful routing

• with RIP version 1, when discontiguous networks exist

with RIP version 2, when discontiguous networks exist

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