Cisco 350-401 Online Practice Questions and Exam Preparation

Cisco 350-401 Online Questions & Answers

• Question 1351:

  What is the data policy in a Cisco SD-WAN deployment?

  A. list of ordered statements that define node configurations and authentication used within the SD-WAN overlay
  B. Set of statements that defines how data is forwarded based on IP packet information and specific VPNs
  C. detailed database mapping several kinds of addresses with their corresponding location
  D. group of services tested to guarantee devices and links liveliness within the SD-WAN overlay
  B. Set of statements that defines how data is forwarded based on IP packet information and specific VPNs

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  Explanation

  The Cisco SD-WAN architecture implements two types of data policy:

  Centralized data policy controls the flow of data traffic based on the source and destination addresses and ports and DSCP fields in the packet's IP header (referred to as a 5-tuple), and based on network segmentation and VPN membership.

  These types of data policy are provisioned centrally, on the Cisco vSmart controller, and they affect traffic flow across the entire network.

  Localized data policy controls the flow of data traffic into and out of interfaces and interface queues on a Cisco vEdge device. This type of data policy is provisioned locally using access lists. It allows you to classify traffic and map different classes to different queues. It also allows you to mirror traffic and to police the rate at which data traffic is transmitted and received.

• Question 1352:

  DRAG DROP

  Drag and drop the definitions in the left to their respective Terminology in the right.

  Select and Place:

  

  

• Question 1353:

  How does QoS traffic shaping alleviate network congestion?

  A. It drops packets when traffic exceeds a certain bitrate.
  B. It buffers and queues packets above the committed rate.
  C. It fragments large packets and queues them for delivery.
  D. It drops packets randomly from lower priority queues.
  B. It buffers and queues packets above the committed rate.

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  Explanation

  Traffic shaping retains excess packets in a queue and then schedules the excess for later transmission over increments of time. The result of traffic shaping is a smoothed packet output rate.

  

  References:

  https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-policing/19645-policevsshape.html

• Question 1354:

  What mechanism does PIM use to forward multicast traffic?

  A. PIM sparse mode uses a pull model to deliver multicast traffic.
  B. PIM dense mode uses a pull model to deliver multicast traffic.
  C. PIM sparse mode uses receivers to register with the RP.
  D. PIM sparse mode uses a flood and prune model to deliver multicast traffic.
  A. PIM sparse mode uses a pull model to deliver multicast traffic.

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  Explanation

  PIM dense mode (PIM-DM) uses a push model to flood multicast traffic to every corner of the network. This push model is a brute-force method of delivering data to the receivers. This method would be efficient in certain deployments in which there are active receivers on every subnet in the network. PIM-DM initially floods multicast traffic throughout the network. Routers that have no downstream neighbors prune the unwanted traffic. This process repeats every 3 minutes. PIM Sparse Mode (PIM-SM) uses a pull model to deliver multicast traffic. Only network segments with active receivers that have explicitly requested the data receive the traffic. PIM-SM distributes information about active sources by forwarding data packets on the shared tree. Because PIM-SM uses shared trees (at least initially), it requires the use of an RP. The RP must be administratively configured in the network. Answer C seems to be correct but it is not, PIM spare mode uses sources (not receivers) to register with the RP. Sources register with the RP, and then data is forwarded down the shared tree to the receivers.

  References:

  Selecting MPLS VPN Services Book, page 193

• Question 1355:

  When is GLBP preferred over HSRP?

  A. When encrypted helm are required between gateways h a single group.
  B. When the traffic load needs to be shared between multiple gateways using a single virtual IP.
  C. When the gateway routers are a mix of Cisco and non-Cisco routers
  D. When clients need the gateway MAC address lo Be the same between multiple gateways
  B. When the traffic load needs to be shared between multiple gateways using a single virtual IP.

• Question 1356:

  What is modularity in network design?

  A. ability to bundle several functions into a single layer of the network
  B. ability to create self-contained, repeatable sections of the network
  C. ability to self-heal the network to prevent service outages
  D. ability to scale and accommodate future needs of the network
  D. ability to scale and accommodate future needs of the network

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  Explanation

  You can design a campus network in a logical manner, using a modular approach. In this approach, each layer of the hierarchical network model can be broken into basic functional units. These units, or modules, then can be sized appropriately and connected, while allowing for future scalability and expansion.

  https://www.ccexpert.us/root-bridge/modular-network-design.html

• Question 1357:

  A client with IP address 209.165.201.25 must access a web server on port 80 at 209.165.200.225. To allow this traffic, an engineer must add a statement to an access control list that is applied in the inbound direction on the port connecting to the web server.

  Which statement allows this traffic?

  A. permit tcp host 209 165 200 225 eq 80 host 209.165.201.25
  B. permit tcp host 209 165.201 25 host 209.165.200.225 eq 80
  C. permit tcp host 209.165.200 225 It 80 host 209.165.201.25
  D. permit tcp host 209.165.200.225 host 209.165.201.25 eq 80
  A. permit tcp host 209 165 200 225 eq 80 host 209.165.201.25

• Question 1358:

  Refer to the exhibit.

  

  Which configuration change will force BR2 to reach 209 165 201 0/27 via BR1?

  A. Set the weight attribute to 65.535 on BR1 toward PE1.
  B. Set the local preference to 150 on PE1 toward BR1 outbound
  C. Set the MED to 1 on PE2 toward BR2 outbound.
  D. Set the origin to igp on BR2 toward PE2 inbound.
  C. Set the MED to 1 on PE2 toward BR2 outbound.

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  Explanation

  (laboratory validated)

  BR2#show ip bgp

  Network Next Hop Metric LocPrf Weight Path

  * i209.165.201.0/27 172.24.109.2 0 100 0 200 i

  *> 209.165.200.230 0 0 300 i

  BR2#show ip bgp

  Network Next Hop Metric LocPrf Weight Path

  * i209.165.201.0/27 172.24.109.2 0 100 0 200 i

  *> 209.165.200.230 1 0 300 i

• Question 1359:

  What is the architectural difference between the MAC address table and TCAM?

  A. TCAM entries are stored for 600 seconds, and MAC address table entries are kept for 200 seconds.
  B. TCAM entries are populated using the ARP table, and the MAC address table is populated dynamically from outgoing frames.
  C. TCAM entries consist of VLAN, port ID and source MAC Address, and MAC address table entries consist of source MAC address end port ID.
  D. TCAM entries are composed of value, mask, and result, and MAC address table entries are composed of value and results.
  D. TCAM entries are composed of value, mask, and result, and MAC address table entries are composed of value and results.

• Question 1360:

  DRAG DROP

  Drag and drop the snippets onto the blanks within the code to create an EEM script that adds an entry to a locally stored text file with a timestamp when a configuration change is made. Not all options are used.

  Select and Place: