[Free] 2017(Oct) Dumps4cert Testinsides Cisco 200-125 Dumps with VCE and PDF Download 401-410

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CCNA Cisco Certified Network Associate CCNA (v3.0)

Question No: 401 – (Topic 8)

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

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

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

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

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

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

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

Answer: B,C

Question No: 402 – (Topic 8)

Which feature can you implement to reserve bandwidth for VoIP calls across the call path?

  1. PQ

  2. CBWFQ

  3. round robin

  4. RSVP

Answer: D

Question No: 403 – (Topic 8)

Which command can you enter to display the operational status of the network ports on a router?

  1. show interface status

  2. show ip interface brief

  3. show running-config interface fastethernet 0/1

  4. show interface switchport

Answer: B

Question No: 404 – (Topic 8)

Which command is necessary to permit SSH or Telnet access to a cisco switch that is otherwise configured for these vty line protocols?

  1. transport type all

  2. transport output all

  3. transport preferred all

  4. transport input all

Answer: D

Question No: 405 – (Topic 8)

Which statement about Cisco Discovery Protocol is true?

  1. It is a Cisco-proprietary protocol.

  2. It runs on the network layer.

  3. It can discover information from routers, firewalls, and switches.

  4. It runs on the physical layer and the data link layer.

Answer: A

Question No: 406 – (Topic 8)

Which two circumstances can cause collision domain issues on VLAN domain? (Choose two.)

  1. duplex mismatches on Ethernet segments in the same VLAN

  2. multiple errors on switchport interfaces

  3. congestion on the switch inband path

  4. a failing NIC in an end device

  5. an overloaded shared segment

Answer: A,C Explanation: Collision Domains

A collision domain is an area of a single LAN where end stations contend for access to the network because all end stations are connected to a shared physical medium. If two connected devices transmit onto the media at the same time, a collision occurs. When a collision occurs, a JAM signal is sent on the network, indicating that a collision has occurred and that devices should ignore any fragmented data associated with the collision. Both sending devices back off sending their data for a random amount and then try again if the medium is free for transmission. Therefore, collisions effectively delay transmission of data, lowering the effective throughput available to a device. The more devices that are attached to a collision domain, the greater the chances of collisions; this results in lower bandwidth and performance for each device attached to the collision domain. Bridges and switches terminate the physical signal path of a collision domain, allowing you to segment separate collision domains, breaking them up into multiple smaller pieces to provide more

bandwidth per user within the new collision domains formed.

Question No: 407 – (Topic 8)

What are three characteristics of satellite Internet connections? (Choose three.)

  1. Their upload speed is about 10 percent of their download speed.

  2. They are frequently used by rural users without access to other high-speed connections.

  3. They are usually at least 10 times faster than analog modem connections.

  4. They are usually faster than cable and DSL connections.

  5. They require a WiMax tower within 30 miles of the user location.

  6. They use radio waves to communicate with cellular phone towers.

Answer: A,B,C

Question No: 408 – (Topic 8)

If you configure syslog messages without specifying the logging trap level, which log messages will the router send?

  1. error conditions only

  2. warning and error conditions only

  3. normal but significant conditions only

  4. all levels except debugging

  5. informational messages only

Answer: E

Question No: 409 – (Topic 8)

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Dumps4Cert 2017 PDF and VCE

Dumps4Cert 2017 PDF and VCE

Dumps4Cert 2017 PDF and VCE

Dumps4Cert 2017 PDF and VCE

Dumps4Cert 2017 PDF and VCE

Dumps4Cert 2017 PDF and VCE

Why did Branch1 router lose WAN connectivity with R1 router?

  1. The IP address is misconfigured on PPP multilink interface on the Branch1 router.

  2. The PPP multilink group is misconfigured on the 拢ranch1 serial interfaces.

  3. The PPP multilink group is misconfigured on the R1 serial interfaces.

  4. The Branch1 serial interfaces are placed in a shutdown condition.

Answer: A

Question No: 410 – (Topic 8)

Which statement about slow inter VLAN forwarding is true?

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

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

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

  4. The entire VLAN is experiencing slowness.

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

Answer: E Explanation:

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 quot;slow VLANquot;. To clarify, this document defines the following new terms: quot;slow collision domainquot;, quot;slow broadcast domainquot; (in other words, slow VLAN), and quot;slow interVLAN forwardingquot;. These are defined in the section Three 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.

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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).

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