CCNA Discovery 4 - Module 6 Exam Version 4.0 Designing and Supporting Computer Networks

1. 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

2. 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.

3. How many bits make up an IPv6 address?
• 32
• 48
• 64
• 128

4. Refer to the exhibit. The IT management has determined that the new subnet for WGROUP3
needs to be broken down into four more subnets. What would the subnet mask be for the four
newly created subnets within WGROUP3?
• 255.255.128.0
• 255.255.192.0
• 255.255.224.0
• 255.255.248.0
• 255.255.252.0

5. When should the command no auto-summary be used?
• with RIP version 1, to enable classless routing
• with RIP version 2, to enable classless routing
• with RIP version 1, when discontigous networks exist
• with RIP version 2, when discontigous networks exist

6. 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

7. 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
• 255.255.255.0

8. 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

9. 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

10. Refer to the exhibit. What must an administrator do on R3 to ensure that update packets are sent
with subnet mask information?
• Add the commands:
R3(config-router)# auto-summary
R3(config-router)# no version 2
• Add the commands:
R3(config-router)# version 2
R3(config-router)# no auto-summary
• Change the network statement on R3:
R3(config)# network 10.10.4.0
• Add the command:
R3(config)# ip route 0.0.0.0 0.0.0.0 s0/0

11. 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

12. How would the routes for networks 172.16.1.0/24, 172.16.3.0/24, and 172.16.15.0/24 be summarized?
• 172.16.0.0/20
• 172.16.0.0/21
• 172.16.0.0/22
• 172.16.0.0/24

13. 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 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

14. 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 - 172.16.31.255
QA - 172.16.1.255
Development - 172.16.3.255
Sales - 172.16.63.255
• Admin - 172.16.31.255
QA - 172.16.1.127
Development - 172.16.3.255
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

15. 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. 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.

17. 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

18. A network designer is implementing a new network for a company.
The designer is using all new Cisco equipment and has decided to select a hierarchical
routing protocol for the network. The designer wishes to minimize traffic from routing
updates but also needs fast routing 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
• RIP v1
• RIP v2
• OSPF
• EIGRP

19. 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

20. 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
rip name enable 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.

21. 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
172.17.5.0/24 sales
172.17.6.0/26 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

22. 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.

23. Which statement describes MD5 authentication for neighbor authentication?
• All passwords are sent in clear text when neighbors first learn about each other.
• Only the initiating router sends its password using encrypted text when it first discovers a new router.
• All routers send their password using encrypted text only when they first learn of each other.
• All routers send their password using encrypted text each time they exchange update packets.

24. After activating IPv6 traffic forwarding, configuring IPv6 addresses, and globally configure RIPng,
what is the remaining step to activate 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 rip name enable 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.

25. 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

26. 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.

CCNA Discovery 1 - Module 3 Exam Version 4.0 Networking for Home and Small Businesses

1. Which table does a router use to make decisions on where a data packet is to be sent?
• ARP table
• routing table
• network table
• forwarding table

2. What device is typically used as the default gateway for a computer?
• a server hosted by the ISP
• the router interface closest to the computer
• a server managed by a central IT department
• the switch interface that connects to the computer

3. Refer to the graphic. What does the router do after it determines that a data packet from Network 1 should be forwarded to Network 2?
• It sends the data packet as it was received.
• It reassembles the frame with different MAC addresses than the original frame.
• It reassembles the data packet with different IP addresses than the original data packet.
• It reassembles both the packet and the frame with different destination IP and MAC addresses.

4. What does the 100 mean when referencing the 100BASE-T Ethernet standard?
• type of cable used
• type of data transmission
• speed of transmission
• type of connector required
• maximum length of cable allowed

5. What is the purpose of logical addresses in an IP network?
• They identify a specific NIC on a host device.
• They are used to determine which host device accepts the frame.
• They provide vendor-specific information about the host.
• They are used to determine the network that the host is located on.
• They are used by switches to make forwarding decisions.

6. A switch receives a frame with a destination MAC address that is currently not in the MAC table. What action does the switch perform?
• It drops the frame.
• It sends out an ARP request looking for the MAC address.
• It floods the frame out of all active ports, except the origination port.
• It returns the frame to the sender.

7. Which two items are included in a network logical map? (Choose two.)
• naming scheme
• IP addressing scheme
• length of cable runs
• physical location of networking devices
• specific layout of interconnections between networking devices and hosts

8. What is the function of the FCS field in an Ethernet frame?
• detects transmission errors
• provides timing for transmission
• contains the start of frame delimiter
• indicates which protocol will receive the frame

9. If a router receives a packet that it does not know how to forward, what type of route must be configured on the router to prevent the router from dropping it?
• dynamic route
• default route
• destination route
• default destination

10. Refer to the graphic. Five PCs are connected through a hub. If host H1 wants to reply to a message from host H2, which statement is true?
• H1 sends a unicast message to H2, but the hub forwards it to all devices.
• H1 sends a unicast message to H2, and the hub forwards it directly to H2.
• H1 sends a broadcast message to H2, and the hub forwards it to all devices.
• H1 sends a multicast message to H2, and the hub forwards it directly to H2.

11. What is a benefit of having a router within the distribution layer?
• prevents collisions on a local network
• keeps broadcasts contained within a local network
• controls which hosts have access to the network
• controls host-to-host traffic within a single local network

12. An integrated router can normally perform the functions of which two other network devices? (Choose two.)
• NIC
• switch
• e-mail server
• application server
• wireless access point

13. If the default gateway is configured incorrectly on the host, what is the impact on communications?
• The host is unable to communicate on the local network.
• The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.
• The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network.
• There is no impact on communications.

14. Which address does an NIC use when deciding whether to accept a frame?
• source IP address
• source MAC address
• destination IP address
• destination MAC address
• source Ethernet address

15. Host A needs to learn the MAC address of Host B, which is on the same LAN segment. A message has been sent to all the hosts on the segment asking for the MAC address of Host B. Host B responds with its MAC address and all other hosts disregard the request. What protocol was used in this scenario?
• ARP
• DHCP
• DNS
• WINS

16. Which two networking devices are used to connect hosts to the access layer? (Choose two.)
• router
• hub
• switch
• server
• computer

17. Which type of address is used in an Ethernet frame header?
• logical addresses only
• IP addresses only
• MAC addresses only
• broadcast addresses only

18. Which term is used to describe the process of placing one message format into another format so that the message can be delivered across the appropriate medium?
• flow control
• encapsulation
• encoding
• multicasting
• access method

19. Which two statements concerning networking standards are true? (Choose two.)
• adds complexity to networks
• encourages vendors to create proprietary protocols
• provides consistent interconnections across networks
• ensures that communications work best in a single-vendor environment
• simplifies new product development

20. What is a reason for disabling simple file sharing?
• It enables the user to map a remote resource with a local drive.
• It enables the user to share all files with all users and groups.
• It enables the user to share printers.
• It enables the user to set more specific security access levels.

21. Which device accepts a message on one port and always forwards the message to all other ports?
• modem
• switch
• router
• hub