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QUESTION 1
Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security
mechanisms?
A. HDLC
B. PPP
C. X.25
D. Frame Relay
Correct Answer: B
PPP: Provides router-to-router and host-to-network connections over synchronous and asynchronous circuits. PPP was
designed to work with several network layer protocols, including IP. PPP also has built-in security mechanisms, such as
Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP).
QUESTION 2
An administrator has connected devices to a switch and, for security reasons, wants the dynamically learned MAC
addresses from the address table added to the running configuration. Which action must be taken to accomplish this?
A. Use theno switchport port-securitycommand to allow MAC addresses to be added to the configuration.
B. Enable port security and use the keywordsticky.
C. Set the switchport mode to trunk and save the running configuration.
D. Use theswitchport protectedcommand to have the MAC addresses added to the configuration.
Correct Answer: B
QUESTION 3
How can you manually configure a switch so that it is selected as the root Switch?
A. increase the priority number
B. lower the port priority number
C. lower the priority number
D. increase the port priority number
Correct Answer: C
QUESTION 4
Which two benefits of implementing a full-mesh WAN topology are true?(Choose two)
A. increased latency
B. redundancy
C. improved scalability
D. reliability
E. reduced itter
Correct Answer: BD
QUESTION 5
Which three commands are required to enable NTP authentication on a Cisco router? (Choose three)
A. ntp peer
B. ntp max-associations
C. ntp authenticate
D. ntp trusted-key
E. ntp authentication-key
F. ntp refclock
Correct Answer: CDE
Explanation: http://blog.ine.com/2007/12/28/how-does-ntp-authentication-work/
QUESTION 6
Which command can you enter to verify that a router is synced with a configures time source?
A. show ntp authenticate
B. ntp associations
C. ntp server time
D. ntp authenticate
E. show ntp associations
Correct Answer: E
QUESTION 7
When a router is unable to find a known route in the routing table, how does it handle the packet?
A. It discards the packet
B. It sends the packet over the route with the best metric
C. It sends the packet to the next hop address
D. It sends the packet to the gateway of last resort
Correct Answer: A
QUESTION 8
Which three values can be included in the routing table of a router? (Choose three)
A. classful and classless destination addresses
B. source interfaces
C. Routgoing interfaces
D. source IP addresses
E. next hop IP address
F. destination IP addresses
Correct Answer: CDF
QUESTION 9
Which subnet mask would be appropriate for a network address range to be subnetted for up to eight LANs, with each
LAN containing 5 to 26 hosts?
A. 0.0.0.240
B. 255.255.255.252
C. 255.255.255.0
D. 255.255.255.224
E. 255.255.255.240
Correct Answer: D
For a class C network, a mask of 255.255.255.224 will allow for up to 8 networks with 32 IP addresses each (30
usable).
QUESTION 10
Which statement about unicast frame forwarding on a switch is true?
A. The TCAM table stores destination MAC addresses
B. If the destination MAC address is unknown, the frame is flooded to every port that is configured in the same VLAN
except on the port that it was received on.
C. The CAM table is used to determine whether traffic is permitted or denied on a switch
D. The source address is used to determine the switch port to which a frame is forwarded
Correct Answer: B
QUESTION 11
Which RFC was created to alleviate the depletion of IPv4 public addresses?
A. RFC 4193
B. RFC 1519
C. RFC 1518
D. RFC 1918
Correct Answer: D
QUESTION 12
Which benefit of implementing a dual-homed WAN connection instead of a single homed connection is true?
A. Only dual-homed connections support recursive routing
B. Only dual-homed connections support split horizon with EIGRP
C. Only dual-homed connections enable an individual router to tolerate the loss of a network link
D. Only dual-homed connections support OSPF in conjunction with BGP
Correct Answer: C
QUESTION 13
Which three are the components of SNMP? (Choose three)
A. MIB
B. SNMP Manager
C. SysLog Server
D. SNMP Agent
E. Set
Correct Answer: ABD
SNMP is an application-layer protocol that provides a message format for communication between SNMP managers
and agents. SNMP provides a standardized framework and a common language used for the monitoring and
management
of devices in a network.
The SNMP framework has three parts:
+
An SNMP manager
+
An SNMP agent
+
A Management Information Base (MIB)
The SNMP manager is the system used to control and monitor the activities of network hosts using SNMP. The most
common managing system is called a Network Management System (NMS). The term NMS can be applied to either a
dedicated device used for network management, or the applications used on such a device. A variety of network
management applications are available for use with SNMP. These features range from simple command-line
applications to feature-rich graphical user interfaces (such as the CiscoWorks2000 line of products).
The SNMP agent is the software component within the managed device that maintains the data for the device and
reports these data, as needed, to managing systems. The agent and MIB reside on the routing device (router, access
server, or switch). To enable the SNMP agent on a Cisco routing device, you must define the relationship between the
manager and the agent.
The Management Information Base (MIB) is a virtual information storage area for network management information,
which consists of collections of managed objects.
To get the best results in the actual Cisco 200-125, we strongly recommend that you practice as much as possible and clear the concepts and questions from the practice exam questions and answers. It will help you understand the strengths and weaknesses of the relevant syllabus topics.( See details https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/200-125-ccna.html#~stickynav=1）
Tips and tricks to pass the CCNA 200-125 exam
| Know your exam | You need a clear understanding of the structure of the exam. |
| Research objectives | It helps you understand the most important concepts in the course. |
| Study plan | It can help you become more organized and ensure that you cover all areas. |
| Practice exams | Practice exams can help you understand the shortcomings, areas for improvement, whether you need to focus on speed, etc.The site where you can find reliable practice exams in the 200-125 exam is Pass4itsure. |
| Brush up | Refresh your knowledge before the exam |
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