200-125 Guide

200-125 Exam Royal Pack (In Stock.)

  • Cisco
  • Exam Number/Code 200-125
  • Product Name CCNA Cisco Certified Network Associate CCNA (v3.0)
  • Questions and Answers
  • 571 Q&As
  • Last Updated
  • April 17,2017
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2017 Apr 200-125 exam question

Q21.  - (Topic 3)

A network administrator needs to allow only one Telnet connection to a router. For anyone viewing the configuration and issuing the show run command, the password for Telnet access should be encrypted. Which set of commands will accomplish this task?

A. service password-encryption

access-list 1 permit

line vty 0 4 login

password cisco access-class 1

B. enable password secret line vty 0


password cisco

C. service password-encryption line vty 1


password cisco

D. service password-encryption line vty 0 4


password cisco

Answer: C


Only one VTY connection is allowed which is exactly what's requested. Incorrect Answer: command.

line vty0 4

would enable all 5 vty connections.

Topic 4, WAN Technologies

Q22.  - (Topic 5)

What command instructs the device to timestamp Syslog debug messages in milliseconds?

A. service timestamps log datetime localtime<input type

B. service timestamps debug datetime msec<input type

C. service timestamps debug datetime localtime<input type

D. service timestamps log datetime msec

Answer: B


Enable millisecond (msec) timestamps using the service timestamps command: router(config)#service timestamps debug datetime msec.

router(config)#service timestamps log datetime msec The “service timestamps debug”. command configures the system to apply a time stamp to debugging messages. The time- stamp format for datetime is MMM DD HH:MM:SS, where MMM is the month, DD is the date, HH is the hour (in 24-hour notation), MM is the minute, and SS is the second. With the additional keyword msec, the system includes milliseconds in the time stamp, in the format HH:DD:MM:SS.mmm, where .mmm is milliseconds.

Q23.  - (Topic 8)

If a router has four interfaces and each interface is connected to four switches, how many broadcast domains are present on the router?

A. 1

B. 2

C. 4

D. 8

Answer: C

Q24.  - (Topic 5)

Which two tasks does the Dynamic Host Configuration Protocol perform? (Choose two.)

A. Set the IP gateway to be used by the network.

B. Perform host discovery used DHCPDISCOVER message.

C. Configure IP address parameters from DHCP server to a host.

D. Provide an easy management of layer 3 devices.

E. Monitor IP performance using the DHCP server.

F. Assign and renew IP address from the default pool.

Answer: C,F


The Dynamic Host Configuration Protocol (DHCP) is a network protocol used to configure devices that are connected to a network (known as hosts) so they can communicate on that network using the Internet Protocol (IP). It involves clients and a server operating in a client-server model. DHCP servers assigns IP addresses from a pool of addresses and also assigns other parameters such as DNS and default gateways to hosts.

Q25.  - (Topic 4)

Users have been complaining that their Frame Relay connection to the corporate site is very slow. The network administrator suspects that the link is overloaded.

Based on the partial output of the Router# show frame relay pvc command shown in the graphic, which output value indicates to the local router that traffic sent to the corporate site is experiencing congestion?

A. DLCI = 100

B. last time PVC status changed 00:25:40

C. in BECN packets 192

D. in FECN packets 147

E. in DE packets 0

Answer: C


If device A is sending data to device B across a Frame Relay infrastructure and one of the intermediate Frame Relay switches encounters congestion, congestion being full buffers, over-subscribed port, overloaded resources, etc, it will set the BECN bit on packets being returned to the sending device and the FECN bit on the packets being sent to the receiving device.

Regenerate 200-125 actual test:

Q26.  - (Topic 8)

Which command can you enter to troubleshoot the failure of address assignments?

A. show ip dhcp pool

B. show ip dhcp database

C. show ip dhcp import

D. clear ip dhcp server statistics

Answer: A

Q27.  - (Topic 8)

Which standards-based First Hop Redundancy Protocol is a Cisco supported alternative to Hot Standby Router Protocol?





Answer: A

Q28.  - (Topic 3)

On a corporate network, hosts on the same VLAN can communicate with each other, but they are unable to communicate with hosts on different VLANs. What is needed to allow communication between the VLANs?

A. a router with subinterfaces configured on the physical interface that is connected to the switch

B. a router with an IP address on the physical interface connected to the switch

C. a switch with an access link that is configured between the switches

D. a switch with a trunk link that is configured between the switches

Answer: A


Different VLANs can't communicate with each other, they can communicate with the help of Layer3 router. Hence, it is needed to connect a router to a switch, then make the sub- interface on the router to connect to the switch, establishing Trunking links to achieve communications of devices which belong to different VLANs.

When using VLANs in networks that have multiple interconnected switches, you need to use VLAN trunking between the switches. With VLAN trunking, the switches tag each frame sent between switches so that the receiving switch knows to what VLAN the frame belongs. End user devices connect to switch ports that provide simple connectivity to a single VLAN each. The attached devices are unaware of any VLAN structure.

By default, only hosts that are members of the same VLAN can communicate. To change this and allow inter-VLAN communication, you need a router or a layer 3 switch.

Here is the example of configuring the router for inter-vlan communication

RouterA(config)#int f0/0.1 RouterA(config-subif)#encapsulation ? dot1Q IEEE 802.1Q Virtual LAN

RouterA(config-subif)#encapsulation dot1Q or isl VLAN ID RouterA(config-subif)# ip address x.x.x.x y.y.y.y

Q29.  - (Topic 4)

Which two statistics appear in show frame-relay map output? (Choose two.)

A. the number of BECN packets that are received by the router

B. the value of the local DLCI

C. the number of FECN packets that are received by the router

D. the status of the PVC that is configured on the router

E. the IP address of the local router

Answer: B,D


Sample “show frame-relay map” output: R1#sh frame map

Serial0/0 (up): ip dlci 401(0x191,0x6410), dynamic, broadcast,, status defined, active

Serial0/0 (up): ip dlci 403(0x193,0x6430), dynamic, broadcast,, status defined, active

Serial0/0 (up): ip dlci 401(0x191,0x6410), static, CISCO, status defined, active

Q30.  - (Topic 3)

What are two benefits of using a single OSPF area network design? (Choose two.)

A. It is less CPU intensive for routers in the single area.

B. It reduces the types of LSAs that are generated.

C. It removes the need for virtual links.

D. It increases LSA response times.

E. It reduces the number of required OSPF neighbor adjacencies.

Answer: B,C


OSPF uses a LSDB (link state database) and fills this with LSAs (link state advertisement). The link types are as follows:

•LSA Type 1: Router LSA

•LSA Type 2: Network LSA

•LSA Type 3: Summary LSA

•LSA Type 4: Summary ASBR LSA

•LSA Type 5: Autonomous system external LSA

•LSA Type 6: Multicast OSPF LSA

•LSA Type 7: Not-so-stubby area LSA

•LSA Type 8: External attribute LSA for BGP

If all routers are in the same area, then many of these LSA types (Summary ASBR LSA, external LSA, etc) will not be used and will not be generated by any router.

All areas in an Open Shortest Path First (OSPF) autonomous system must be physically connected to the backbone area (Area 0). In some cases, where this is not possible, you can use a virtual link to connect to the backbone through a non-backbone area. You can also use virtual links to connect two parts of a partitioned backbone through a non- backbone area. The area through which you configure the virtual link, known as a transit area, must have full routing information. The transit area cannot be a stub area. Virtual links are not ideal and should really only be used for temporary network solutions or migrations. However, if all locations are in a single OSPF area this is not needed.

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