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Instructions

Total Questions 20
Each question carry 1 mark
Must answer all the questions (otherwise report card will not be generated)
If you dont want to take a test, simply click the check answers button and view all the answers with explanations
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1. Refer to the following exhibit. What will happen when a computer with a different MAC address connects to the interface?

A.
The computer will not be allowed to communicate, but the port will remain up.
B.
The computer will be allowed to communicate.
C.
The computer will not be allowed to communicate and the port will enter an errdisable state
D.
The computer will be allowed to communicate and the access will be logged.

Correct Answers :

[C]

Explanation :

The computer will not be allowed to communicate, and the port will enter an err-disable state. The defaults for port security allow for only one MAC address, and the default violation is shutdown. The violation of shutdown will shut the port down and place it into an err-disable state, which will require administrative intervention.

2. Which authentication method will allow an authenticated user to be able to access only certain commands on a router or switch?

A.
TACACS+
B.
AAA
C.
RADIUS
D.
802.1X

Correct Answers :

[A]

Explanation :

TACACS+ will allow for authentication of users, and it also provides a method of restricting users to specific commands. This allows for much granular control of lower-level administrators.

3. If a router has two interfaces and you only use IPv4, how many access control lists can be configured on the router’s interfaces?

A.
One
B.
Two
C.
Four
D.
Eight

Correct Answers :

[C]

Explanation :

You can have only one access control list (ACL) per direction, per protocol, and per interface. Therefore, each of the two interfaces can have both an inbound and outbound ACL, per the protocol of IPv4. This allows for a total of four ACLs, which can be used to control access through the router.

4. You have a router that you configured with a password, but you have forgotten the password. You have a copy of a recent configuration, and the password line reads as password 7 06074352EFF6. How can you access the router?

A.
You must call the Cisco Technical Assistance Center to reverse the password.
B.
You need to enter the password 06074352EFF6.
C.
Log into another router and type decrypt-password 06074352EFF6 in privilege exec mode.
D.
Perform a password recovery on the router.

Correct Answers :

[D]

Explanation :

Once the password has been forgotten, a password recovery must be performed on the router. Although you have the encrypted password, it cannot be reversed since it is a hash of the password. A hash is a one-way encryption of the password; only the same combination of letters and number will produce the same hash.

5. Which command will achieve the same goal as the command access-list 2 permit host 192.168.2.3?

A.
Router(config)#access-list 2 permit 192.168.2.3 255.255.255.255
B.
Router(config)#access-list 2 permit 192.168.2.3 0.0.0.0
C.
Router(config)#ip access-list 2 permit host 192.168.2.3
D.
Router(config)#access-list 2 permit 192.168.2.3

Correct Answers :

[B]

Explanation :

The command access-list 2 permit 192.168.2.3 0.0.0.0 will perform the same function as access-list 2 permit host 192.168.2.3. The command configures the host 192.168.2.3 with a bit mask, which will only match the single IP address. Although it can be configured as a bit mask, it should be configured via the host parameter for readability.

6.You have a license on a USB drive. Which command would you use to install a license to a router that was obtained from Cisco?

A.
Router#license install usbflash0:FTX3463434Z_2016030415234562345.lic
B.
Router(config)#license install usbflash0:FTX3463434Z_ 2016030415234562345.lic
C.
Router#license install file usbflash0:FTX3463434Z_ 2016030415234562345.lic
D.
Router#copy usbflash0:FTX3463434Z_2016030415234562345.lic flash:

Correct Answers :

[A]

Explanation :

The command license install usbflash0:FTX3463434Z_2016030415234562345.lic will install the license file to the router. This command must be entered in privileged exec mode.

7. What is the default destination of Cisco devices for sending syslog messages?

A.
Broadcasts to a syslog server
B.
Console
C.
TTY
D.
NVRAM

Correct Answers :

[B]

Explanation :

By default, all syslog messages are sent to the console of the router or switch. It is recommended to configure a syslog server, because once the router or switch is powered off, the information is lost.

8. You perform a show version and see the configuration register of 0x2142. What will the router do on the next reload?

A.
The router will reboot with a console speed of 19200 baud.
B.
The router will ignore breaks to the IOS.
C.
The router will ignore the contents of NVRAM.
D.
The router will boot into ROMMON mode.

Correct Answers :

[C]

Explanation :

The configuration register of 0x2142 is used for the password recovery process. The configuration register will tell the boot process to ignore the contents of NVRAM, which is where the startup-configuration is located. It will only use NVRAM for the location of the boot system variable.

9. On which software-defined network (SDN) plane does CDP function?

A.
Data plane
B.
Control plane
C.
Network plane
D.
Management plane

Correct Answers :

[D]

Explanation :

The Cisco Discovery Protocol functions on the management plane of the SDN model. It helps with management of the routers and switches and does not directly impact the data plane.

10. What must the network management station (NMS) be configured with before it can read the SNMP counters on a router or switch?

A.
SNMP community
B.
MIB
C.
Version of SNMP
D.
All of the above

Correct Answers :

[D]

Explanation :

The network management station (NMS) must be configured with the version of SNMP, the community, and the management information base (MIB) before it can access the counters on a router or switch.

11.On which OSI layer does the Address Resolution Protocol (ARP) function?

A.
Application layer
B.
Session layer
C.
Data Link layer
D.
Network layer

Correct Answers :

[C]

Explanation :

The Address Resolution Protocol (ARP) functions on layer 2, the Data Link layer

12. Which flags are used during the three-way-handshake process for TCP?

A.
FIN and ACK
B.
SYN and ACK
C.
SYN and FIN
D.
SYN and RDY

Correct Answers :

[B]

Explanation :

During the three-way-handshake, Computer A sends a SYN flag along with its receiving window size and initial sequence number. Then Computer B sends a SYN flag and ACK flag along with its receiving window and acknowledgment of the sequence number. Finally, Computer A sends an ACK flag, which acknowledges the synchronization of Computer B’s receiving window. Communication begins and is considered to be in an established state.

13. You are running several web servers in a cloud with a server load balancer. As demand increases, you add web servers. According to the NIST standard of cloud computing, which feature can you use to increase your compute capability for demand?

A.
Resource pooling
B.
Measured services
C.
Broad network access
D.
Rapid elasticity

Correct Answers :

[D]

Explanation :

Rapid elasticity is the ability to add and remove compute capability in the cloud. As demand is needed, compute power can be increased by adding more CPUs or servers. As demand for compute power decreases, CPUs or servers can be removed.

14. In Cisco’s three-tier architecture, the links between the distribution layer indicate what kind of topology?

A.
Full mesh topology
B.
Partial mesh topology
C.
Star topology
D.
Ring topology

Correct Answers :

[B]

Explanation :

The distribution layer is a partial mesh topology. Links between the distribution switches and core switches are multi-homed to each device for redundancy. Also, the links between the distribution switches and access switches are multi-homed to each device for redundancy. Although, this might seems to be a full mesh topology, the distribution switches are not connected to each other.

15. Which type of cabling is used for high-speed long-distance transmission of data?

A.
T1 serial lines
B.
Single-mode fiber
C.
Twinax
D.
Multi-mode fiber

Correct Answers :

[B]

Explanation :

Single-mode fiber is typically used in high-speed long-distance transmission of data. It can span up to 70 kilometers (km) with the proper transceivers. The speeds of single-mode fiber can be up the 100 Gb/s with the proper transceivers.

16. What is the last step in the diagnosis and resolution of a problem?

A.
Isolating the problem
B.
Escalating the problem
C.
Documenting the problem
D.
Analyzing the problem

Correct Answers :

[C]

Explanation :

Documenting the problem is the last step in resolving a problem. After you monitor the problem for the implementation of the fix, the documentation should describe the problem, the root cause of the problem, and the resolution. The documentation can then be used for future problems that match the same criteria.

17. You are configuring RIP for a network and you need to advertise the network.Which command will advertise the route for 203.244.234.0/24?

A.
Class A
B.
Class B
C.
Class C
D.
Class D

Correct Answers :

[D]

Explanation :

The IP address 225.34.5.4 is a multicast IP address. Multicast IP addresses are defined as Class D addresses in the range 224.0.0.1 to 239.255.255.254.

18. In IPv6, the solicited-node multicast message is used for what?

A.
Discovery of the gateway
B.
Discovery of the network ID
C.
Resolution of the MAC address for an IPv6 address
D.
Capability discovery of neighboring devices

Correct Answers :

[C]

Explanation :

In IPv6, the solicited-node multicast message is used for resolution of the MAC address for an IPv6 address. The first 104 bits of the 128-bit IPv6 address is ff02::1:ff, and the last 24 bits comprise the last 24 bits of the IPv6 address that needs to be resolved. The solicited-node multicast message is also used for Duplicate Address Detection (DAD).

19. In the following exhibit, what is Field C used for?

A.
The destination MAC address
B.
The next upper-layer protocol to send the information to
C.
The beginning of data, also called the start frame delimiter
D.
The cyclical redundancy checksum value

Correct Answers :

[B]

Explanation :

Field C in the exhibit is the type field. The type field is used to define the upperlayer protocol the data belongs to.

20. Under what circumstance will a switch flood a frame to all ports on the switch?

A.
When the source MAC address is unknown by the switch
B.
When the destination MAC address is a multicast address
C.
When the destination MAC address is unknown by the switch
D.
When the destination MAC address is 0000.0000.0000

Correct Answers :

[C]

Explanation :

When the destination MAC address is not in the MAC address table, the switch will flood the frame to all ports on the switch. When the computer or device responds, the switch will memorize the source MAC address with the port on which it sees the traffic.

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