200-125 Exam
Secrets to ccna routing and switching 200 125
Exam Code: 200 125 cisco (Practice Exam Latest Test Questions VCE PDF)
Exam Name: CCNA Cisco Certified Network Associate CCNA (v3.0)
Certification Provider: Cisco
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New Cisco 200-125 Exam Dumps Collection (Question 4 - Question 13)
Question No: 4
What are three reasons to collect Netflow data on a company network? (Choose three.)
A. To identify applications causing congestion.
B. To authorize user network access.
C. To report and alert link up / down instances.
D. To diagnose slow network performance, bandwidth hogs, and bandwidth utilization.
E. To detect suboptimal routing in the network.
F. To confirm the appropriate amount of bandwidth that has been allocated to each Class of Service.
Answer: A,D,F
Explanation:
NetFlow facilitates solutions to many common problems encountered by IT professionals.
+ Analyze new applications and their network impact
Identify new application network loads such as VoIP or remote site additions.
+ Reduction in peak WAN traffic
Use NetFlow statistics to measure WAN traffic improvement from application-policy changes; understand who is utilizing the network and the network top talkers.
+ Troubleshooting and understanding network pain points
Diagnose slow network performance, bandwidth hogs and bandwidth utilization quickly with command line interface or reporting tools. -> D is correct.
+ Detection of unauthorized WAN traffic
Avoid costly upgrades by identifying the applications causing congestion. -> A is correct.
+ Security and anomaly detection
NetFlow can be used for anomaly detection and worm diagnosis along with applications such as Cisco CS-Mars.
+ Validation of QoS parameters
Confirm that appropriate bandwidth has been allocated to each Class of Service (CoS) and that no CoS is over- or under-subscribed.-> F is correct.
Question No: 5
Which two of these statements are true of IPv6 address representation? (Choose two.)
A. There are four types of IPv6 addresses: unicast, multicast, anycast, and broadcast.
B. A single interface may be assigned multiple IPv6 addresses of any type.
C. Every IPv6 interface contains at least one loopback address.
D. The first 64 bits represent the dynamically created interface ID.
E. Leading zeros in an IPv6 16 bit hexadecimal field are mandatory.
Answer: B,C
Explanation:
u2711 A single interface may be assigned multiple addresses of any type (unicast, anycast, multicast).
u2711 Every IPv6-enabled interface must contain at least one loopback and one link-local
address.
u2711 Optionally, every interface can have multiple unique local and global addresses.
Reference: IPv6 Addressing at a Glance u2013 Cisco PDF
Question No: 6
Scenario
Refer to the topology. Your company has connected the routers R1, R2, and R3 with serial links. R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also connected to the routers R4 and R5.
The EIGRP routing protocol is configured.
You are required to troubleshoot and resolve the EIGRP issues between the various routers.
Use the appropriate show commands to troubleshoot the issues.
Router R6 does not form an EIGRP neighbor relationship correctly with router R1. What is the cause for this misconfiguration?
A. The K values mismatch.
B. The AS does not match.
C. The network command is missing.
D. The passive interface command is enabled.
Answer: C
Explanation:
The link from R1 to R6 is shown below:
As you can see, they are both using e0/0. The IP addresses are in the 192.168.16.0 network:
But when we look at the EIGRP configuration, the u201cnetwork 192.168.16.0u201d command is missing on R6.
Question No: 7
Which statement describes the process of dynamically assigning IP addresses by the DHCP server?
A. Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
B. Addresses are permanently assigned so that the hosts uses the same address at all times.
C. Addresses are assigned for a fixed period of time, at the end of the period, a new request for an address must be made.
D. Addresses are leased to hosts, which periodically contact the DHCP server to renew the lease.
Answer: D
Explanation:
The DHCP lifecycle consists of the following:
u2711 Allocation:A client begins with no active lease, and hence, no DHCP-assigned address. It acquires a lease through a process ofallocation.
u2711 Reallocation:If a client already has an address from an existing lease, then when it reboots or starts up after being shut down, it will contact the DHCP server that granted it the lease to confirm the lease and acquire operating parameters. This is sometimes calledreallocation; it is similar to the full allocation process but shorter.
u2711 Normal Operation:Once a lease is active, the client functions normally, using its assigned IP address and other parameters during the u201cmain partu201d of the lease. The client is said to beboundto the lease and the address.
u2711 Renewal:After a certain portion of the lease time has expired, the client will attempt to contact the server that initially granted the lease, torenewthe lease so it can
keep using its IP address.
u2711 Rebinding.If renewal with the original leasing server fails (because, for example, the server has been taken offline), then the client will try torebindto any active DHCP server, trying to extend its current lease with any server that will allow it to do so.
u2711 Release:The client may decide at any time that it no longer wishes to use the IP address it was assigned, and may terminate the lease,releasingthe IP address.
Question No: 8
What Netflow component can be applied to an interface to track IPv4 traffic?
A. flow monitor
B. flow record
C. flow sampler
D. flow exporter
Answer: A
Explanation:
Flow monitors are the Flexible NetFlow component that is applied to interfaces to perform network traffic monitoring. Flow monitors consist of a record and a cache. You add the record to the flow monitor after you create the flow monitor. The flow monitor cache is automatically created at the time the flow monitor is applied to the first interface. Flow data is collected from the network traffic during the monitoring process based on the key and nonkey fields in the record, which is configured for the flow monitor and stored in the flow monitor cache.
For example, the following example creates a flow monitor named FLOW-MONITOR-1 and enters Flexible NetFlow flow monitor configuration mode:
Router(config)# flow monitor FLOW-MONITOR-1 Router(config-flow-monitor)#
Question No: 9
Scenario
Refer to the topology. Your company has connected the routers R1, R2, and R3 with serial links. R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also connected to the routers R4 and R5.
The EIGRP routing protocol is configured.
You are required to troubleshoot and resolve the EIGRP issues between the various routers.
Use the appropriate show commands to troubleshoot the issues.
Which path does traffic take from R1 to R5?
A. The traffic goes through R2.
B. The traffic goes through R3.
C. The traffic is equally load-balanced over R2 and R3.
D. The traffic is unequally load-balanced over R2 and R3.
Answer: A
Explanation:
Using the u201cshow ip int brief commandu201d on R5 we can see the IP addresses assigned to this router. Then, using the u201cshow ip routeu201d command on R1 we can see that to reach 10.5.5.5 and 10.5.5.55 the preferred path is via Serial 1/3, which we see from the diagram is the link to R2.
Question No: 10
Refer to the exhibit.
All devices attached to the network are shown. Which number of collision domains are present in this network?
A. 9
B. 3
C. 6
D. 2
E. 15
Answer: E
Question No: 11
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
Explanation:
Enable millisecond (msec) timestamps using the service timestamps command: router(config)#service timestamps debug datetime msec.
router(config)#service timestamps log datetime msec The u201cservice timestamps debugu201d.
command configures the system to apply a time stamp to debugging messages. The time- stamp format fordatetimeisMMM DD HH:MM:SS, whereMMMis the month,DDis the date,HHis the hour (in 24-hour notation),MMis the minute, andSSis the second. With the additional keywordmsec, the system includes milliseconds in the time stamp, in the formatHH:DD:MM:SS.mmm, where .mmmis milliseconds.
Question No: 12
What Cisco IOS feature can be enabled to pinpoint an application that is causing slow network performance?
A. SNMP
B. Netflow
C. WCCP
D. IP SLA
Answer: B
Explanation:
Netflow can be used to diagnose slow network performance, bandwidth hogs and bandwidth utilization quickly with command line interface or reporting tools.
Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios-netflow/prod_white_paper0900aecd80406232.html
Question No: 13
Refer to the exhibit.
Which address range efficiently summarizes the routing table of the addresses for router Main?
A. 172.16.0.0./21
B. 172.16.0.0./20
C. 172.16.0.0./16
D. 172.16.0.0/18
Answer: B
Explanation:
The 172.16.0.0./20 network is the best option as it includes all networks from 172.16.0.0 u2013 172.16.16.0 and does it more efficiently than the /16 and /18 subnets. The /21 subnet will not include all the other subnets in this one single summarized address.
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