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New Cisco 200-125 Exam Dumps Collection (Question 9 - Question 18)

New Questions 9

What are two benefits of private IPv4 IP addresses? (Choose two.)

A. They are routed the same as public IP addresses.

B. They are less costly than public IP addresses.

C. They can be assigned to devices without Internet connections.

D. They eliminate the necessity for NAT policies.

E. They eliminate duplicate IP conflicts.

Answer: B,C

New Questions 10

When enabled, which feature prevents routing protocols from sending hello messages on an interface'?

A. virtual links

B. passive-interface

C. directed neighbors

D. OSPF areas

Answer: B


You can use thepassive-interfacecommand in order to control the advertisement of routing information. The command enables the suppression of routing updates over some interfaces while it allows updates to be exchanged normally over other interfaces.

With most routing protocols, thepassive-interfacecommand restricts outgoing advertisements only. But, when used with Enhanced Interior Gateway Routing Protocol (EIGRP), the effect is slightly different. This document demonstrates that use of the passive-interfacecommand in EIGRP suppresses the exchange of hello packets between two routers, which results in the loss of their neighbor relationship. This stops not only routing updates from being advertised, but it also suppresses incoming routing updates. This document also discusses the configuration required in order to allow the suppression

of outgoing routing updates, while it also allows incoming routing updates to be learned normally from the neighbor.

New Questions 11

What are two requirements for an HSRP group? (Choose two.)

A. exactly one active router

B. one or more standby routers

C. one or more backup virtual routers

D. exactly one standby active router

E. exactly one backup virtual router

Answer: A,B

New Questions 12

Which three characteristics are representative of a link-state routing protocol? (Choose three.)

A. provides common view of entire topology

B. exchanges routing tables with neighbors

C. calculates shortest path

D. utilizes event-triggered updates

E. utilizes frequent periodic updates

Answer: A,C,D

New Questions 13

Which switching method duplicates the first six bytes of a frame before making a switching decision?

A. fragment-free switching

B. store and-forward switching

C. cut through switching

D. ASIC switching

Answer: C

Explanation: Cut and Through method has lowest latency. In this method Switch only read first six bytes from frame after the preamble. These six bytes are the destination address of frame. This is the fastest method of switching. This method also processes invalid frames. Only advantage of this method is speed.

New Questions 14

Which statement about slow inter VLAN forwarding is true?

A. The VLAN is experiencing slowness in the point-to-point collisionless connection.

B. The VLANs are experiencing slowness because multiple devices are connected to the same hub.

C. The local VLAN is working normally, but traffic to the alternate VLAN is forwarded slower than expected.

D. The entire VLAN is experiencing slowness.

E. The VLANs are experiencing slowness due to a duplex mismatch.

Answer: E


Common Causes of Slow IntraVLAN and InterVLAN Connectivity

The symptoms of slow connectivity on a VLAN can be caused by multiple factors on different network layers. Commonly the network speed issue may be occurring on a lower level, but symptoms can be observed on a higher level as the problem masks itself under the term "slow VLAN". To clarify, this document defines the following new terms: "slow collision domain", "slow broadcast domain" (in other words, slow VLAN), and "slow interVLAN forwarding". These are defined in the sectionThree Categories of Causes, below.

In the following scenario (illustrated in the network diagram below), there is a Layer 3 (L3) switch performing interVLAN routing between the server and client VLANs. In this failure scenario, one server is connected to a switch, and the port duplex mode is configured half- duplex on the server side and full-duplex on the switch side. This misconfiguration results in a packet loss and slowness, with increased packet loss when higher traffic rates occur on the link where the server is connected. For the clients who communicate with this server, the problem looks like slow interVLAN forwarding because they do not have a problem communicating to other devices or clients on the same VLAN. The problem occurs only when communicating to the server on a different VLAN. Thus, the problem occurred on a single collision domain, but is seen as slow interVLAN forwarding.

Three Categories of Causes

The causes of slowness can be divided into three categories, as follows:

Slow Collision Domain Connectivity

Collision domain is defined as connected devices configured in a half-duplex port configuration, connected to each other or a hub. If a device is connected to a switch port and full-duplex mode is configured, such a point-to-point connection is collisionless.

Slowness on such a segment still can occur for different reasons.

Slow Broadcast Domain Connectivity (Slow VLAN)

Slow broadcast domain connectivity occurs when the whole VLAN (that is, all devices on the same VLAN) experiences slowness.

Slow InterVLAN Connectivity (Slow Forwarding Between VLANs)

Slow interVLAN connectivity (slow forwarding between VLANs) occurs when there is no slowness on the local VLAN, but traffic needs to be forwarded to an alternate VLAN, and it is not forwarded at the expected rate.

Causes for Network Slowness Packet Loss

In most cases, a network is considered slow when higher-layer protocols (applications) require extended time to complete an operation that typically runs faster. That slowness is caused by the loss of some packets on the network, which causes higher-level protocols like TCP or applications to time out and initiate retransmission.

Hardware Forwarding Issues

With another type of slowness, caused by network equipment, forwarding (whether Layer 2 [L2] or L3) is performed slowly. This is due to a deviation from normal (designed) operation and switching to slow path forwarding. An example of this is when Multilayer Switching (MLS) on the switch forwards L3 packets between VLANs in the hardware, but due to misconfiguration, MLS is not functioning properly and forwarding is done by the router in the software (which drops the interVLAN forwarding rate significantly).

New Questions 15

Which Cisco platform can verify ACLs?

A. Cisco Prime Infrastructure

B. Cisco Wireless LAN Controller

C. Cisco APIC-EM

D. Cisco IOS-XE

Answer: B

New Questions 16

Which two EtherChannel PAgP modes can you configure? (Choose two.)

A. passive

B. auto

C. desirable

D. on

E. active

Answer: B,C

New Questions 17

Refer to the exhibit.

Which statement describes the effect of this configuration?

A. The VLAN 10 VTP configuration is displayed.

B. VLAN 10 spanning-tree output is displayed.

C. The VLAN 10 configuration is saved when the router exits VLAN configuration mode.

D. VLAN 10 is added to the VLAN database.

Answer: D

New Questions 18

Which two statements about late collisions are true? (Choose two.)

A. They may indicate a duplex mismatch.

B. By definition, they occur after the 512th bit of the frame has been transmitted.

C. They indicate received frames that did not pass the FCS match.

D. They are frames that exceed 1518 bytes.

E. They occur when CRC errors and interference occur on the cable.

Answer: A,B

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