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New Cisco 200-125 Exam Dumps Collection (Question 7 - Question 14)

Question No: 7

An administrator is trying to ping and telnet from SwitchC to RouterC with the results shown below.

Click the console connected to RouterC and issue the appropriate commands to answer the questions.

Which will fix the issue and allow ONLY ping to work while keeping telnet disabled?

A. Correctly assign an IP address to interface fa0/1.

B. Change the ip access-group command on fa0/0 from u201cinu201d to u201coutu201d.

C. Removeaccess-group 106 infrom interface fa0/0 and addaccess-group 115 in.

D. Removeaccess-group 102 outfrom interface s0/0/0 and addaccess-group 114 in

E. Removeaccess-group 106 infrom interface fa0/0 and addaccess-group 104 in.

Answer: E

Explanation:

Letu2021s have a look at the access list 104:

The question does not ask about ftp traffic so we donu2021t care about the two first lines. The 3rd line denies all telnet traffic and the 4th line allows icmp traffic to be sent (ping). Remember that the access list 104 is applied on the inbound direction so the 5th line u201caccess-list 104 deny icmp any any echo-replyu201d will not affect our icmp traffic because the u201cecho-replyu201d message will be sent over the outbound direction.

Question No: 8

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: 9

Which option is a valid IPv6 address?

A. 2001:0000:130F::099a::12a

B. 2002:7654:A1AD:61:81AF:CCC1

C. FEC0:ABCD:WXYZ:0067::2A4

D. 2004:1:25A4:886F::1

Answer: D

Explanation:

An IPv6 address is represented as eight groups of four hexadecimal digits, each group representing 16 bits (two octets). The groups are separated by colons (:). An example of an IPv6 address is 2001:0db8:85a3:0000:0000:8a2e:0370:7334. The leading 0u2021s in a group can be collapsed using ::, but this can only be done once in an IP address.

Question No: 10

Which three features are added in SNMPv3 over SNMPv2?

A. Message Integrity

B. Compression

C. Authentication

D. Encryption

E. Error Detection

Answer: A,C,D

Explanation:

Cisco IOS software supports the following versions of SNMP:

+ SNMPv1 u2013 The Simple Network Management Protocol: A Full Internet Standard, defined

in RFC 1157. (RFC 1157 replaces the earlier versions that were published as RFC 1067 and RFC 1098.) Security is based on community strings.

+ SNMPv2c u2013 The community-string based Administrative Framework for SNMPv2. SNMPv2c (the u201ccu201d stands for u201ccommunityu201d) is an Experimental Internet Protocol defined in RFC 1901, RFC 1905, and RFC 1906. SNMPv2c is an update of the protocol operations and data types of SNMPv2p (SNMPv2 Classic), and uses the community-based security model of SNMPv1.

+ SNMPv3 u2013 Version 3 of SNMP. SNMPv3 is an interoperable standards-based protocol defined in RFCs 2273 to 2275. SNMPv3 provides secure access to devices by a combination of authenticating and encrypting packets over the network. The security features provided in SNMPv3 are as follows:

u2013 Message integrity: Ensuring that a packet has not been tampered with in transit.

u2013 Authentication: Determining that the message is from a valid source.

u2013 Encryption: Scrambling the contents of a packet prevent it from being learned by an unauthorized source.

Question No: 11

Scenario:

Refer to the topology. Your company has decided to connect the main office with three

other remote branch offices using point-to-point serial links.

You are required to troubleshoot and resolve OSPF neighbor adjacency issues between the main office and the routers located in the remote branch offices.

R1 does not form an OSPF neighbor adjacency with R2. Which option would fix the issue?

A. R1 ethernet0/1 is shutdown. Configure no shutdown command.

B. R1 ethernet0/1 configured with a non-default OSPF hello interval of 25; configure no ip ospf hello-interval 25.

C. R2 ethernet0/1 and R3 ethernet0/0 are configured with a non-default OSPF hello

interval of 25; configure no ip ospf hello-interval 25.

D. Enable OSPF for R1 ethernet0/1; configure ip ospf 1 area 0 command under ethernet0/1.

Answer: B

Explanation:

Looking at the configuration of R1, we see that R1 is configured with a hello interval of 25 on interface Ethernet 0/1 while R2 is left with the default of 10 (not configured).

Question No: 12

What are three values that must be the same within a sequence of packets for Netflow to consider them a network flow? (Choose three.)

A. source IP address

B. source MAC address

C. egress interface

D. ingress interface

E. destination IP address

F. IP next-hop

Answer: A,D,E

Explanation:

Each packet that is forwarded within a router or switch is examined for a set of IP packet attributes. These attributes are the IP packet identity or fingerprint of the packet and determine if the packet is unique or similar to other packets.

Traditionally, an IP Flow is based on a set of 5 and up to 7 IP packet attributes. IP Packet attributes used by NetFlow:

u2022 IP source address

u2022 IP destination address

u2022 Source port

u2022 Destination port

u2022 Layer 3 protocol type

u2022 Class of Service

u2022 Router or switch interface

All packets with the same source/destination IP address, source/destination ports, protocol interface and class of service are grouped into a flow and then packets and bytes are tallied. This methodology of fingerprinting or determining a flow is scalable because a large

amount of network information is condensed into a database of NetFlow information called the NetFlow cache.

Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios-netflow/prod_white_paper0900aecd80406232.html

Question No: 13

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.

The loopback interfaces on R4 with the IP addresses of 10.4.4.4/32, 10.4.4.5/32, and 10.4.4.6/32 are not appearing in the routing table of R5. Why are the interfaces missing?

A. The interfaces are shutdown, so they are not being advertised.

B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5.

C. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.

D. The loopback addresses haven't been advertised, and the network command is missing on R4.

Answer: B

Explanation:

For an EIGRP neighbor to form, the following must match:

- Neighbors must be in the same subnet

- K values

- AS numbers

- Authentication method and key strings

Here, we see that R4 is configured for EIGRP AS 2, when it should be AS 1.

Question No: 14

Scenario:

Refer to the topology. Your company has decided to connect the main office with three other remote branch offices using point-to-point serial links.

You are required to troubleshoot and resolve OSPF neighbor adjacency issues between the main office and the routers located in the remote branch offices.

An OSPF neighbor adjacency is not formed between R3 in the main office and R4 in the Branch1 office. What is causing the problem?

A. There is an area ID mismatch.

B. There is a Layer 2 issue; an encapsulation mismatch on serial links.

C. There is an OSPF hello and dead interval mismatch.

D. The R3 router ID is configured on R4.

Answer: A

Explanation:

A show running-config command on R3 and R4 shows that R4 is incorrectly configured for area 2:

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