How to win with ccna 200 125 syllabus

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Q71.  - (Topic 3)

What is the effect of using the service password-encryption command?

A. Only the enable password will be encrypted.

B. Only the enable secret password will be encrypted.

C. Only passwords configured after the command has been entered will be encrypted.

D. It will encrypt the secret password and remove the enable secret password from the configuration.

E. It will encrypt all current and future passwords.

Answer: E


Enable vty, console, AUX passwords are configured on the Cisco device. Use the show run command to show most passwords in clear text. If the service password-encryption is used, all the passwords are encrypted. As a result, the security of device access is improved.

Q72.  - (Topic 8)

Which command can you execute to set the user inactivity timer to 10 seconds?

A. SW1(config-line)#exec-timeout 0 10

B. SW1(config-line)#exec-timeout 10

C. SW1(config-line)#absolute-timeout 0 10

D. SW1(config-line)#absolute-timeout 10

Answer: A

Q73.  - (Topic 8)

Which two statements about the tunnel mode ipv6ip command are true? (Choose two.)

A. It enables the transmission of IPv6 packets within the configured tunnel.

B. It specifies IPv4 as the encapsulation protocol.

C. It specifies IPv6 as the encapsulation protocol.

D. It specifies IPv6 as the transport protocol.

E. It specifies that the tunnel is a Teredo tunnel.

Answer: A,B

Q74.  - (Topic 5)

How is an EUI-64 format interface ID created from a 48-bit MAC address?

A. by appending 0xFF to the MAC address

B. by prefixing the MAC address with 0xFFEE

C. by prefixing the MAC address with 0xFF and appending 0xFF to it

D. by inserting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address

E. by prefixing the MAC address with 0xF and inserting 0xF after each of its first three bytes

Answer: D


The modified EUI-64 format interface identifier is derived from the 48-bit link-layer (MAC) address by inserting the hexadecimal number FFFE between the upper three bytes (OUI field) and the lower three bytes (serial number) of the link layer address.

Q75.  - (Topic 3)

Which two are advantages of static routing when compared to dynamic routing? (Choose two.)

A. Configuration complexity decreases as network size increases.

B. Security increases because only the network administrator may change the routing table.

C. Route summarization is computed automatically by the router.

D. Routing tables adapt automatically to topology changes.

E. An efficient algorithm is used to build routing tables, using automatic updates.

F. Routing updates are automatically sent to neighbors.

G. Routing traffic load is reduced when used in stub network links.

Answer: B,G


Since static routing is a manual process, it can be argued that it is more secure (and more prone to human errors) since the network administrator will need to make changes to the routing table directly. Also, in stub networks where there is only a single uplink connection, the load is reduced as stub routers just need a single static default route, instead of many routes that all have the same next hop IP address.

Q76.  - (Topic 4)

RouterA is unable to reach RouterB. Both routers are running IOS version 12.0.

After reviewing the command output and graphic, what is the most likely cause of the problem?

A. incorrect bandwidth configuration

B. incorrect LMI configuration

C. incorrect map statement

D. incorrect IP address

Answer: C


First we have to say this is an unclear question and it is wrong. The “frame-relay map ip” statement is correct thus none of the four answers above is correct. But we guess there is a typo in the output. Maybe the “ip address command should be “ip address That makes answer C correct.

Q77.  - (Topic 3)

Before installing a new, upgraded version of the IOS, what should be checked on the router, and which command should be used to gather this information? (Choose two.)

A. the amount of available ROM

B. the amount of available flash and RAM memory

C. the version of the bootstrap software present on the router

D. show version

E. show processes

F. show running-config

Answer: B,D


When upgrading a new version of the IOS we need to copy the IOS to the Flash so first we have to check if the Flash has enough memory or not. Also running the new IOS may require more RAM than the older one so we should check the available RAM too. We can check both with the “show version” command.

Q78.  - (Topic 5)

Which two benefits are provided by using a hierarchical addressing network addressing scheme? (Choose two.)

A. reduces routing table entries

B. auto-negotiation of media rates

C. efficient utilization of MAC addresses

D. dedicated communications between devices

E. ease of management and troubleshooting

Answer: A,E


Here are some of the benefits of hierarchical addressing:

✑ Reduced number of routing table entries — whether it is with your Internet routers or your internal routers, you should try to keep your routing tables as small as possible by using route summarization. Route summarization is a way of having a single IP address represent a collection of IP addresses; this is most easily accomplished when you employ a hierarchical addressing plan. By summarizing routes, you can keep your routing table entries (on the routers that receive the summarized routes) manageable, which offers the following benefits:

✑ Efficient allocation of addresses—Hierarchical addressing lets you take advantage of all possible addresses because you group them contiguously.


Q79.  - (Topic 5)

Which command enables IPv6 forwarding on a Cisco router?

A. ipv6 local

B. ipv6 host

C. ipv6 unicast-routing

D. ipv6 neighbor

Answer: C


To enable IPv6 routing on the Cisco router use the following command: ipv6 unicast-routing

If this command is not recognized, your version of IOS does not support IPv6.

Q80.  - (Topic 7)

What command visualizes the general NetFlow data on the command line?

A. show ip flow export

B. show ip flow top-talkers

C. show ip cache flow

D. show mls sampling

E. show mls netflow ip

Answer: C


The following is an example of how to visualize the NetFlow data using the CLI. There are three methods to visualize the data depending on the version of Cisco IOS Software. The traditional show command for NetFlow is "show ip cache flow" also available are two forms of top talker commands. One of the top talkers commands uses a static configuration to view top talkers in the network and another command called dynamic top talkers allows real-time sorting and aggregation of NetFlow data. Also shown is a show MLS command to view the hardware cache on the Cisco Catalyst 6500 Series Switch.

The following is the original NetFlow show command used for many years in Cisco IOS Software. Information provided includes packet size distribution; basic statistics about number of flows and export timer setting, a view of the protocol distribution statistics and the NetFlow cache.

The “show ip cache flow” command displays a summary of the NetFlow accounting statistics.


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