Cisco 200-105 Online Practice Questions and Exam Preparation

Cisco 200-105 Online Questions & Answers

• Question 631:

  What are three values that must be the same within a sequence of packets for Netflow to consider them a network flow? (Choose three.)

  A. source IP address
  B. source MAC address
  C. egress interface
  D. ingress interface
  E. destination IP address
  F. IP next-hop
  A. source IP address
  D. ingress interface
  E. destination IP address

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  Each packet that is forwarded within a router or switch is examined for a set of IP packet attributes. These attributes are the IP packet identity or fingerprint of the packet and determine if the packet is unique or similar to other packets. Traditionally, an IP Flow is based on a set of 5 and up to 7 IP packet attributes.

  IP Packet attributes used by NetFlow:

  IP source address IP destination address Source port Destination port Layer 3 protocol type Class of Service Router or switch interface

  All packets with the same source/destination IP address, source/destination ports, protocol interface and class of service are grouped into a flow and then packets and bytes are tallied. This methodology of fingerprinting or determining a flow is scalable because a large amount of network information is condensed into a database of NetFlow information called the NetFlow cache.

  Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios-netflow/prod_white_paper0900aecd80406232.html

• Question 632:

  Users have been complaining that their Frame Relay connection to the corporate site is very slow. The network administrator suspects that the link is overloaded. Based on the partial output of the Router # show frame relay pvc command shown in the graphic, which output value indicates to the local router that traffic sent to the corporate site is experiencing congestion?

  

  A. DLCI=100
  B. last time PVC status changed 00:25:40
  C. in BECN packets 192
  D. in FECN packets 147
  E. in DF packets 0
  C. in BECN packets 192

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  First we should grasp the concept of BECN and FECN through an example:

  

  Suppose Router A wants to send data to Router B through a Frame Relay network. If the network is congested, Switch 1 (a DCE device) will set the FECN bit value of that frame to 1, indicating that frame experienced congestion in the path

  from source to destination.

  This frame is forwarded to Switch 2 and to Router B (with the FECN bit = 1). Switch 1 knows that the network is congesting so it also sends frames back to Router A with BECN bit set to 1 to inform that path through the network is congested.

  

  In general, BECN is used on frames traveling away from the congested area to warn source devices that congestion has occurred on that path while FECN is used to alert receiving devices if the frame experiences congestion.

  BECN also informs the transmitting devices to slow down the traffic a bit until the network returns to normal state.

  The question asks "which output value indicates to the local router that traffic sent to the corporate site is experiencing congestion" which means it asks about the returned parameter which indicates congestion ->BECN.

• Question 633:

  Which option is the main function of congestion management?

  A. providing long term storage of buffered data
  B. queuing traffic based on priority
  C. discarding excess traffic
  D. classifying traffic
  B. queuing traffic based on priority

• Question 634:

  In which two models can control-plane functionality be implemented? (Choose two.)

  A. Dispersed
  B. Distributed
  C. Fragmented
  D. Centralized
  E. Allocated
  B. Distributed
  D. Centralized

• Question 635:

  DRAG DROP

  Drag and drop the GRE configuration commands from the left onto the correct effects on the right.

  Select and Place:

  

  

• Question 636:

  Which type of attack can be mitigated by configuring the default native VLAN to be unused?

  A. CAM table overflow
  B. switch spoofing
  C. VLAN hopping
  D. MAC spoofing
  C. VLAN hopping

• Question 637:

  Which tool or utility can report whether traffic matching specific criteria can reach a specified destination on the ACLs along the path?

  A. Cisco Security Device Manager
  B. Cisco Prime
  C. APIC-EM
  D. Cisco Network Assistant
  A. Cisco Security Device Manager

• Question 638:

  Drat the description on the left to the routing protocol on the right. (Not all options are used.)

  Select and Place:

  

  

• Question 639:

  Which two statements about switch stacking are true? (Choose two.)

  A. The stack is powered by a single power cable
  B. The switches are connected in a daisy-chain fashion
  C. The first and last switch in the stack must be connected to one another
  D. The switches are connected by crossover cables
  E. The switches must be fully meshed
  A. The stack is powered by a single power cable
  B. The switches are connected in a daisy-chain fashion

• Question 640:

  Which two switch states are valid for 802.1w? (Choose two.)

  A. listening
  B. backup
  C. disabled
  D. learning
  E. discarding
  D. learning
  E. discarding

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  Port States

  There are only three port states left in RSTP that correspond to the three possible operational states. The 802.1D disabled, blocking, and listening states are merged into a unique 802.1w discarding state.