Cisco 200-120 Online Practice Questions and Exam Preparation

Cisco 200-120 Online Questions & Answers

• Question 191:

  Which parameter or parameters are used to calculate OSPF cost in Cisco routers?

  A. Bandwidth
  B. Bandwidth and Delay
  C. Bandwidth, Delay, and MTU
  D. Bandwidth, MTU, Reliability, Delay, and Load
  A. Bandwidth

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  The well-known formula to calculate OSPF cost is Cost = 108 / Bandwidth

• Question 192:

  Which of the following are benefits of VLANs? (Choose three.)

  A. They increase the size of collision domains.
  B. They allow logical grouping of users by function.
  C. They can enhance network security.
  D. They increase the size of broadcast domains while decreasing the number of collision domains.
  E. They increase the number of broadcast domains while decreasing the size of the broadcast domains.
  F. They simplify switch administration.
  B. They allow logical grouping of users by function.
  C. They can enhance network security.
  E. They increase the number of broadcast domains while decreasing the size of the broadcast domains.

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  When using VLAN the number and size of collision domains remain the same ->.

  VLANs allow to group users by function, not by location or geography ->.

  VLANs help minimize the incorrect configuration of VLANs so it enhances the security of the network ->.

  VLAN increases the size of broadcast domains but does not decrease the number of collision domains ->.

  VLANs increase the number of broadcast domains while decreasing the size of the broadcast domains which increase the utilization of the links. It is also a big advantage of VLAN ->.

  VLANs are useful but they are more complex and need more administration ->.

• Question 193:

  Where does routing occur within the DoD TCP/IP reference model?

  A. application
  B. internet
  C. network
  D. transport
  B. internet

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  The picture below shows the comparison between TCP/IP model and OSI model. Notice that the Internet Layer of TCP/IP is equivalent to the Network Layer which is responsible for routing decision.

  

• Question 194:

  On which options are standard access lists based?

  A. destination address and wildcard mask
  B. destination address and subnet mask
  C. source address and subnet mask
  D. source address and wildcard mask
  D. source address and wildcard mask

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  Standard ACL's only examine the source IP address/mask to determine if a match is made. Extended ACL's examine the source and destination address, as well as port information.

• Question 195:

  Refer to the exhibit.

  

  What can be determined about the router from the console output?

  A. No configuration file was found in NVRAM.
  B. No configuration file was found in flash.
  C. No configuration file was found in the PCMCIA card.
  D. Configuration file is normal and will load in 15 seconds.
  A. No configuration file was found in NVRAM.

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  When no startup configuration file is found in NVRAM, the System Configuration Dialog will appear to ask if we want to enter the initial configuration dialog or not.

• Question 196:

  Which switch would STP choose to become the root bridge in the selection process?

  A. 32768: 11-22-33-44-55-66
  B. 32768: 22-33-44-55-66-77
  C. 32769: 11-22-33-44-55-65
  D. 32769: 22-33-44-55-66-78
  A. 32768: 11-22-33-44-55-66

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  The root bridge of the spanning tree is the bridge with the smallest (lowest) bridge ID. Each bridge has a configurable priority number and a MAC Address; the bridge ID contains both numbers combined together - Bridge priority + MAC (32768.0200.0000.1111). The Bridge priority default is 32768 and can only be configured in multiples of 4096(Spanning tree uses the 12 bits extended system ID). To compare two bridge IDs, the priority is compared first, as if looking at a real number anything less than 32768...will become the target of being the root. If two bridges have equal priority then the MAC addresses are compared; for example, if switches A (MAC=0200.0000.1111) and B (MAC=0200.0000.2222) both have a priority of 32768 then switch A will be selected as the root bridge. In this case, 32768: 11-22-33-44-55-66 would be the bridge because it has a lower priority and MAC address.

• Question 197:

  Which two statements about IPv6 router advertisement messages are true? (Choose two.)

  A. They use ICMPv6 type 134.
  B. The advertised prefix length must be 64 bits.
  C. The advertised prefix length must be 48 bits.
  D. They are sourced from the configured IPv6 interface address.
  E. Their destination is always the link-local address of the neighboring node.
  A. They use ICMPv6 type 134.
  B. The advertised prefix length must be 64 bits.

• Question 198:

  Refer to the exhibit.

  

  Switch-1 needs to send data to a host with a MAC address of 00b0.d056.efa4. What will Switch-1 do with this data?

  A. Switch-1 will drop the data because it does not have an entry for that MAC address.
  B. Switch-1 will flood the data out all of its ports except the port from which the data originated.
  C. Switch-1 will send an ARP request out all its ports except the port from which the data originated.
  D. Switch-1 will forward the data to its default gateway.
  B. Switch-1 will flood the data out all of its ports except the port from which the data originated.

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  This question tests the operating principles of the Layer 2 switch. Check the MAC address table of Switch1 and find that the MAC address of the host does not exist in the table. Switch1 will flood the data out all of its ports except the port from

  which the data originated to determine which port the host is located in.

  Switches work as follows:

  Switches learn the MAC addresses of PCs or workstations that are connected to their switch ports by examining the source address of frames that are received on that port.

  

  Machines may have been removed from a port, turned off, or moved to another port on the same switch or a different switch.

  

  This could cause confusion in frame forwarding.

  

  The MAC address entry is automatically discarded or aged out after 300 seconds

  

  If there is not MAC address of destination host in MAC table, switch sends broadcast to all ports except the source to find out the destination host.

  

  In output there is no MAC address of give host so switch floods to all ports except the source port.

• Question 199:

  Refer to the exhibit.

  

  All of the routers in the network are configured with the ip subnet-zero command. Which network addresses should be used for Link A and Network A? (Choose two.)

  A. Network A - 172.16.3.48/26
  B. Network A - 172.16.3.128/25
  C. Network A - 172.16.3.192/26
  D. Link A - 172.16.3.0/30
  E. Link A - 172.16.3.40/30
  F. Link A - 172.16.3.112/30
  B. Network A - 172.16.3.128/25
  D. Link A - 172.16.3.0/30

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  Only a /30 is needed for the point to point link and sine the use of the ip subnet-zero was used, 172.16.3.0/30 is valid. Also, a /25 is required for 120 hosts and again 172.16.3.128/25 is the best, valid option.

• Question 200:

  Refer to Exhibit:

  

  How many broadcast domains are shown in the graphic assuming only the default VLAN is configured on the switches?

  A. one
  B. two
  C. six
  D. twelve
  A. one

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  Only router can break up broadcast domains but in this exhibit no router is used so there is only 1 broadcast domain.

  For your information, there are 7 collision domains in this exhibit (6 collision domains between hubs and switches + 1 collision between the two switches).