CCNA 4 Exploration v4.0 - Module 7

Chapter 7 - Exam Answers

1. Why is it important to record baseline measurements of a prototype network?

Test results show security weaknesses after the baseline tests are run.
The baseline is the point at which the network is operating at its fullest potential.
Baseline measurements define a point at which network traffic has exceeded the designed capabilities of the network.
• Test results are compared to the baseline to see how the test conditions increase processor use or decrease available bandwidth.

 

2. Refer to the exhibit. During prototype testing, verification of VLAN connectivity is being performed. Based on the information shown, what command produced the output?

show spanning-tree
• show interfaces trunk

show cdp neighbors
show interfaces
show ip interface brief

3. How do designers decide which network functions need to be included in the prototype test?
• They select the functions that align with the business goals.
They select the functions that occur at the network core.
They select the functions that do not exist in the existing network.
They select the functions from a list of generic network operations.

 

4. Refer to the exhibit. A network administrator has been given the task of creating a design for a temporary classroom building that is to be set up outside an overcrowded school. In testing the prototype, it is found that the student PC cannot ping the teacher PC. All the switch interfaces are active and connected properly, as is interface Fa0/0 of the router. Given that only the commands shown have been added to the router configuration, what is the source of the problem?

• The IP settings on the student PC are incorrect.
The default gateway on the teacher PC is misconfigured.
The router Fa0/0 interface has not been configured as a VLAN trunk.
The Fa0/0 physical interface has not been configured with an IP address and subnet mask.
The administrator forgot to configure a routing protocol to allow the ping packets to reach the teacher PC subnet.

 

5. Refer to the exhibit. What two measures can be taken to address the areas of weakness circled in the network design? (Choose two.)

Provide redundant connections to all end users.
Add another core switch to increase redundancy.
• Add a switch in the server block connecting the server farm to each core switch.
Add an additional switch to the DMZ and direct links from the new switch to the core switches.
• Provide a redundant firewall router connecting to a second ISP, the core switches, and the DMZ.

 

6. Refer to the exhibit. After all the interfaces have stabilized, what is the spanning-tree state of all the enabled interfaces of SW11?

discarding
Forwarding
learning
listening

 

7. A network engineer has decided to pilot test a portion of a new network design rather than rely on a prototype for proof-of-concept. What are two advantages of pilot testing a design concept? (Choose two.)

• The test network experiences real-world network traffic.
Users within the enterprise are not affected by the test.
• Network response can be tested in unplanned and unpredictable situations.
Unlikely failure conditions can be conveniently tested.
Network response can be tested in a highly controlled simulated environment.

 

8. Refer to the exhibit. During prototype testing of the Cisco network shown, connectivity must be verified. Assuming all connections are working and CDP is enabled on all devices and interfaces, on which device was the command issued?

• R1

S1
R3
S2
R5
S3

 

9. Switch port Fa0/24 was previously configured as a trunk, but now it is to be used to connect a host to the network. How should the network administrator reconfigure switch port Fa0/24?

Use the switchport mode access command from interface configuration mode.
Enter the switchport nonegotiate command from interface configuration mode.
Administratively shut down and re-enable the interface to return it to the default.
• Enter the no switchport mode trunk command in interface configuration mode.
Use the switchport access vlanvlan number command from interface configuration mode to remove the port from the trunk and add it to a specific VLAN.

 

10. Refer to the exhibit. A network technician is performing an initial installation of a new switch in the east wing. The technician removes the switch from the box, makes the connections to the network, and adds the configuration shown. The technician notifies the network administrator that the switch has been installed. When the network administrator at the home office attempts to telnet to the switch from host 192.168.0.1, the connection fails. What action should the network technician take?

Add an enable password to the switch.
• Add a default gateway to the switch configuration.
Configure the switch with an IP access list to permit the host connection.
Enable the physical interfaces of the switch with the no shutdown command.

 

11. Refer to the exhibit. The redundant paths are of equal bandwidth and EIGRP is the routing protocol in use. Which statement describes the data flow from Server to PC2?

• EIGRP load balances across the R3 to R1 and R3 to R2 links.
EIGRP load balances across the R1 to Switch3 and R2 to Switch3 paths.
EIGRP load balances across the Switch1 to Switch3 and Switch1 to Switch2 paths.
EIGRP does not load balance in this topology.

 

12. In the router command encapsulation dot1q 10, what does the number 10 represent?

the metric used for a particular route
• the number of the VLAN associated with the encapsulated subinterface
the priority number given to the device for the election process
the number that must match the Fast Ethernet subinterface number
the number used to program the router for unequal cost path load balancing

 

13. Which protocol allows a switch port to transition directly to the forwarding state after a failure is detected?

• STP

BGP
RSTP
HSRP

 

14. A network designer needs to determine if a proposed IP addressing scheme allows efficient route summarization and provides the appropriate amount of scalability to a design. What is useful for validating a proposed hierarchical IP addressing scheme?

NBAR
a pilot network
a route summary
• a network simulator

a physical topology map

 

15. Refer to the exhibit. A network designer creates a test plan that includes the specification shown. In which section of the test plan would this specification be found?

Test Description
Test Procedures
Design and Topology Diagram
Actual Results and Conclusions
• Anticipated Results and Success Criteria

 

16. While preparing a network test plan document, a network designer records all initial and modified device configurations. Which section of the document typically contains this information?

• Appendix
Test Procedures
Test Description
Actual Results and Conclusions
Anticipated Results and Success Criteria

 

17. Refer to the exhibit. The users on the 192.168.10.192 network are not allowed Internet access. The network design calls for an extended ACL to be developed and tested. Where should the ACL be placed for the least effect on other network traffic?

inbound on Fa0/0 of R3
outbound on Fa0/0 of R3
inbound on Fa0/1 of R3
• outbound on Fa0/1 of R3
inbound on Fa0/1 of R2
outbound on S0/0 of R2

 

18. Refer to the exhibit. Why are interfaces Fa0/11, Fa0/23, and Fa0/24 not shown in this switch output?

• Interfaces Fa0/11, Fa0/23, and Fa0/24 are trunks.

Interfaces Fa0/11, Fa0/23, and Fa0/24 are shutdown.
Interfaces Fa0/11, Fa0/23, and Fa0/24 are blocking.
Interfaces Fa0/11, Fa0/23, and Fa0/24 failed diagnostics.

 

19. What OSI model Layer 2 security measure can a network engineer implement when prototyping network security?

a firewall at the network edge
• port security at the access design layer
port security at the distribution design layer
IP access control lists at the access design layer

 

20. Refer to the exhibit. During prototyping, Layer 2 functionality is being tested. Based on the output shown, which two pieces of information can be determined? (Choose two.)

Switch1 is the root bridge.
Interface Fa0/2 on Switch1 has no role in the operation of spanning tree.
• Interface Fa0/2 on Switch1 is the alternate port used to reach the root bridge.
• Based on the entries in the "Role" column, it can be concluded that RSTP has been implemented.
Interface Fa0/1 on Switch1 is the forwarding port selected for the entire spanning-tree topology.

 

21. What Rapid Spanning Tree Protocol (RSTP) state is given to the forwarding port elected for every switched Ethernet LAN segment?

root
backup
alternate
• Designated