200-125 | Refresh 200-125 Exam Study Guides With New Update Exam Questions

Question No: 5

What are three characteristics of the TCP protocol? (Choose three.)

A. It uses a single SYN-ACK message to establish a connection.

B. The connection is established before data is transmitted.

C. It ensures that all data is transmitted and received by the remote device.

D. It supports significantly higher transmission speeds than UDP.

E. It requires applications to determine when data packets must be retransmitted.

F. It uses separate SYN and ACK messages to establish a connection.

Answer: B,C,F

Question No: 6

Which option is the default switch port port-security violation mode?

A. shutdown

B. protect

C. shutdown vlan

D. restrict

Answer: A

Explanation:

Shutdownu2014This mode is the default violation mode; when in this mode, the switch will automatically force the switchport into an error disabled (err-disable) state when a violation occurs. While in this state, the switchport forwards no traffic. The switchport can be brought out of this error disabled state by issuing theerrdisable recovery causeCLI command or by disabling and reenabling the switchport.

Shutdown VLANu2014This mode mimics the behavior of the shutdown mode but limits the error disabled state the specific violating VLAN.

Question No: 7

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

A. Only the enable password will be encrypted.

B. It will encrypt all current and future passwords.

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

D. Only the enable secret password will be encrypted.

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

Answer: B

Explanation:

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.

Question No: 8

Scenario:

You are a junior network engineer for a financial company, and the main office network is experiencing network issues. Troubleshoot the network issues.

Router R1 connects the main office to the internet, and routers R2 and R3 are internal routers.

NAT is enabled on router R1.

The routing protocol that is enabled between routers R1, R2 and R3 is RIPv2.

R1 sends the default route into RIPv2 for the internal routers to forward internet traffic to R1.

You have console access on R1, R2 and R3 devices. Use only show commands to troubleshoot the issues.

Users complain that they are unable to reach internet sites. You are troubleshooting internet connectivity problem at main office. Which statement correctly identifies the problem on Router R1?

A. Interesting traffic for NAT ACL is incorrectly configured.

B. NAT configurations on the interfaces are incorrectly configured

C. NAT translation statement incorrectly configured.

D. Only static NAT translation configured for the server, missing Dynamic NAT or Dynamic NAT overloading for internal networks.

Answer: B

Question No: 9

Which IEEE standard does PVST+ use to tunnel information?

A. 802.1x

B. 802 1q

C. 802.1w

D. 802.1s

Answer: B

Question No: 10

Which two statements about northbound and southbound APIs are true? (Choose two.)

A. Only southbound APIs allow program control of the network.

B. Only northbound APIs allow program control of the network.

C. Only southbound API interfaces use a Service Abstraction Layer.

D. Only northbound API interfaces use a Service Abstraction Layer.

E. Both northbound and southbound API interfaces use a Service Abstraction Layer.

F. Both northbound and southbound APIs allow program control of the network.

Answer: B,C

Question No: 11

Which step in the router boot process searches for an IOS image to load into the router?

A. bootstrap

B. POST

C. mini-IOS

D. ROMMON mode

Answer: A

Question No: 12

Which two Cisco IOS commands, used in troubleshooting, can enable debug output to a remote location? (Choose two)

A. no logging console

B. logging host ip-address

C. terminal monitor

D. show logging | redirect flashioutput.txt

E. snmp-server enable traps syslog

Answer: B,C

Question No: 13

When is the most appropriate time to escalate an issue that you are troubleshooting?

A. when you lack proper resources to resolve the issue

B. when you have gathered all available information about the issue

C. when you have been unable to resolve the issue after 30 minutes

D. when a more urgent issue that requires your intervention is detected

Answer: B

Question No: 14

Which feature allows a device to use a switch port that is configured for half-duplex to access the network?

A. CSMA/CD

B. IGMP

C. port security

D. split horizon

Answer: A

Explanation:

Ethernet began as a local area network technology that provided a half-duplex shared

channel for stations connected to coaxial cable segments linked with signal repeaters. In this appendix, we take a detailed look at the half-duplex shared-channel mode of operation, and at the CSMA/CD mechanism that makes it work.

In the original half-duplex mode, the CSMA/CD protocol allows a set of stations to compete for access to a shared Ethernet channel in a fair and equitable manner. The protocolu2021s rules determine the behavior of Ethernet stations, including when they are allowed to transmit a frame onto a shared Ethernet channel, and what to do when a collision occurs. Today, virtually all devices are connected to Ethernet switch ports over full-duplex media, such as twisted-pair cables. On this type of connection, assuming that both devices can support the full-duplex mode of operation and that Auto-Negotiation (AN) is enabled, the AN protocol will automatically select the highest-performance mode of operation supported by the devices at each end of the link. That will result in full-duplex mode for the vast majority of Ethernet connections with modern interfaces that support full duplex and AN.