Cisco 200-101 Online Practice Questions and Exam Preparation

Cisco 200-101 Online Questions & Answers

• Question 91:

  A network associate is configuring a router for the weaver company to provide internet access. The ISP has provided the company six public IP addresses of

  198.18.184.105 198.18.184.110. The company has 14 hosts that need to access the internet simultaneously. The hosts in the company LAN have been assigned private space addresses in the range of 192.168.100.17 - 192.168.100.30.

  

  

  Correct Answer. The above named organisation has 14 hosts that need to access the internet
  The above named organisation has 14 hosts that need to access the internet

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  simultaneously but were provided with just 6 public IP addresses from198.18.184.105 to 198.18.184.110/29.

  In this case, you have to consider using NAT Overload (or PAT)

  Doubleclick on the Weaver router to access the CLI

  Router> enable

  Router# configure terminal

  First you should change the router's name to Weaver:

  Router(config)#hostname Weaver

  Create a NAT pool of global addresses to be allocated with their netmask:

  Weaver(config)# ip nat pool mypool 198.18.184.105 198.18.184.110 netmask 255.255.255.248

  Create a standard access control list that permits the addresses that are to be translated:

  Weaver(config)#access-list 1 permit 192.168.100.16 0.0.0.15

  Establish dynamic source translation, specifying the access list that was defined in the prior step:

  Weaver(config)#ip nat inside source list 1 pool mypool overload

  Finally, we should save all your work with the following command:

  Weaver#copy running-config startup-config (Don't forget this)

  Check your configuration by going to "Host for testing" and type:

  C : \ >ping 192.0.2.114 The ping should work well and you will be replied from 192.0.2.114 This command translates all source addresses that pass access list 1, which means a source address from 192.168.100.17 to 192.168.100.30, into an address from the pool named mypool (the pool contains addresses from 198.18.184.105 to 198.18.184.110) Overload keyword allows to map multiple IP addresses to a single registered IP address (many-to- one) by using different ports. The question said that appropriate interfaces have been configured for NAT inside and NAT outside statements. This is how to configure the NAT inside and NAT outside, just for your understanding: Weaver(config)#interface fa0/0 Weaver(config-if)#ip nat inside Weaver(config-if)#exit Weaver(config)#interface s0/0 Weaver(config-if)#ip nat outside Weaver(config-if)#end

• Question 92:

  What is the result of issuing the frame-relay map ip 192.168.1.2 202 broadcast command?

  A. defines the destination IP address that is used in all broadcast packets on DCLI 202
  B. defines the source IP address that is used in all broadcast packets on DCLI 202
  C. defines the DLCI on which packets from the 192.168.1.2 IP address are received
  D. defines the DLCI that is used for all packets that are sent to the 192.168.1.2 IP address
  D. defines the DLCI that is used for all packets that are sent to the 192.168.1.2 IP address

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  Frame-relay map ip 192.168.1.2 202 command statically defines a mapping between a network layer address and a DLCI. The broadcast option allows multicast and broadcast packets to flow across the link. The command frame-relay map ip 192.168.1.2 202 broadcast means to mapping the distal IP 192.168.1.2 202 to the local DLCI . When the "broadcast" keyword is included, it turns Frame Relay network as a broadcast network, which can forward broadcasts. http://www.cisco.com/en/US/docs/ios/wan/command/reference/ wan_f2.html#wp1012264

  

• Question 93:

  What are two drawbacks of implementing a link-state routing protocol? (Choose two.)

  A. the sequencing and acknowledgment of link-state packets
  B. the requirement for a hierarchical IP addressing scheme for optimal functionality
  C. the high volume of link-state advertisements in a converged network
  D. the high demand on router resources to run the link-state routing algorithm
  E. the large size of the topology table listing all advertised routes in the converged network
  B. the requirement for a hierarchical IP addressing scheme for optimal functionality
  D. the high demand on router resources to run the link-state routing algorithm

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  Link State routing protocols, such as OSPF and IS-IS, converge more quickly than their distance vector routing protocols such as RIPv1, RIPv2, EIGRP and so on, through the use of flooding and triggered updates. In link state protocols, changes are flooded immediately and computed in parallel. Triggered updates improve convergence time by requiring routers to send an update message immediately upon learning of a route change. These updates are triggered by some event, such as a new link becoming available oor an existing link failing. The main drawbacks to link state routing protocols are the amount of CPU overhead involved in calculating route changes and memory resources that are required to store neighbor tables, route tables and a complete topology table. http://www.ciscopress.com/articles/article.asp?p=24090andseqNum=4

• Question 94:

  Refer to the exhibit.

  

  Why has this switch not been elected the root bridge for VLAN1?

  A. It has more than one interface that is connected to the root network segment.
  B. It is running RSTP while the elected root bridge is running 802.1d spanning tree.
  C. It has a higher MAC address than the elected root bridge.
  D. It has a higher bridge ID than the elected root bridge.
  D. It has a higher bridge ID than the elected root bridge.

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  http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a008009482f.shtml

  When a switch receives a BPDU, it first compares priority, the lower number wins. If a tie, compare MAC, the smaller one wins. Here Switch has 32769 priority which is greater than 20481 so switch will not elect for root bridge. It says the bridge priority for Switch is 32769, and the root priority is 20481. Which means that some other switch has the lower priority and won the election for VLAN 1.

• Question 95:

  What are the two default metrics used by EIGRP for route selection? (Choose two.)

  A. Bandwidth
  B. Delay
  C. Reliability
  D. Load
  E. MTU
  A. Bandwidth
  B. Delay

• Question 96:

  Refer to the exhibit.

  

  What address is a feasible successor?

  A. 172.16.4.0
  B. 10.1.4.4
  C. 10.1.2.2
  D. 172.16.3.0
  C. 10.1.2.2

• Question 97:

  When a router undergoes the exchange protocol within OSPF, in what order does it pass through each state?

  A. exstart state > loading state > exchange state > full state
  B. exstart state > exchange state > loading state > full state
  C. exstart state > full state > loading state > exchange state
  D. loading state > exchange state > full state > exstart state
  B. exstart state > exchange state > loading state > full state

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  Why Are OSPF Neighbors Stuck in Exstart/Exchange State? Reference: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f0d.shtml

• Question 98:

  Refer to the exhibit.

  

  Which two statements are true about the loopback address that is configured on RouterB? (Choose two.)

  A. It ensures that data will be forwarded by RouterB.
  B. It provides stability for the OSPF process on RouterB.
  C. It specifies that the router ID for RouterB should be 10.0.0.1.
  D. It decreases the metric for routes that are advertised from RouterB.
  E. It indicates that RouterB should be elected the DR for the LAN.
  B. It provides stability for the OSPF process on RouterB.
  C. It specifies that the router ID for RouterB should be 10.0.0.1.

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  A loopback interface never comes down even if the link is broken so it provides stability for the OSPF process (for example we use that loopback interface as the router-id) - B is correct.

  The router-ID is chosen in the order below:

  The highest IP address assigned to a loopback (logical) interface. If a loopback interface is not defined, the highest IP address of all active router's physical interfaces will be chosen.

  -The loopback interface will be chosen as the router ID of RouterB - C is correct.

• Question 99:

  Which two are advantages of static routing when compared to dynamic routing? (Choose two.)

  A. Configuration complexity decreases as network size increases.
  B. Security increases because only the network administrator may change the routing table.
  C. Route summarization is computed automatically by the router.
  D. Routing tables adapt automatically to topology changes.
  E. An efficient algorithm is used to build routing tables, using automatic updates.
  F. Routing updates are automatically sent to neighbors.
  G. Routing traffic load is reduced when used in stub network links.
  B. Security increases because only the network administrator may change the routing table.
  G. Routing traffic load is reduced when used in stub network links.

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  http://www.ciscopress.com/articles/article.asp?p=24090andseqNum=6 http://www.ciscopress.com/articles/article.asp?p=24090

• Question 100:

  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.