Cisco 200-120 Online Practice Questions and Exam Preparation

Cisco 200-120 Online Questions & Answers

• Question 241:

  Which NAT function can map multiple inside addresses to a single outside address?

  A. PAT
  B. SFTP
  C. RARP
  D. ARP
  E. TFTP
  A. PAT

• Question 242:

  What Cisco IOS feature can be enabled to pinpoint an application that is causing slow network performance?

  A. SNMP
  B. Netflow
  C. WCCP
  D. IP SLA
  B. Netflow

  ---

  Netflow can be used to diagnose slow network performance, bandwidth hogs and bandwidth utilization quickly with command line interface or reporting tools.

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

• Question 243:

  Refer to the exhibit.

  

  What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown?

  A. The Serial0/0 interface is passing traffic.
  B. The DLCI 100 was dynamically allocated by the router.
  C. The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHCP server.
  D. The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay cloud.
  E. The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP.
  E. The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP.

  ---

  Inverse Address Resolution Protocol (Inverse ARP) was developed to provide a mechanism for dynamic DLCI to Layer 3 address maps. Inverse ARP works much the same way Address Resolution Protocol (ARP) works on a LAN. However, with ARP, the device knows the Layer 3 IP address and needs to know the remote data link MAC address. With Inverse ARP, the router knows the Layer 2 address which is the DLCI, but needs to know the remote Layer 3 IP address. When using dynamic address mapping, Inverse ARP requests a next-hop protocol address for each active PVC. Once the requesting router receives an Inverse ARP response, it updates its DLCI-to-Layer 3 address mapping table. Dynamic address mapping is enabled by default for all protocols enabled on a physical interface. If the Frame Relay environment supports LMI autosensing and Inverse ARP, dynamic address mapping takes place automatically. Therefore, no static address mapping is required.

• Question 244:

  Refer to the exhibit.

  

  A junior network administrator was given the task of configuring port security on SwitchA to allow only PC_A to access the switched network through port fa0/1. If any other device is detected, the port is to drop frames from this device. The administrator configured the interface and tested it with successful pings from PC_A to RouterA, and then observes the output from these two show commands.

  Which two of these changes are necessary for SwitchA to meet the requirements? (Choose two.)

  A. Port security needs to be globally enabled.
  B. Port security needs to be enabled on the interface.
  C. Port security needs to be configured to shut down the interface in the event of a violation.
  D. Port security needs to be configured to allow only one learned MAC address.
  E. Port security interface counters need to be cleared before using the show command.
  F. The port security configuration needs to be saved to NVRAM before it can become active.
  B. Port security needs to be enabled on the interface.
  D. Port security needs to be configured to allow only one learned MAC address.

  ---

  From the output we can see that port security is disabled so this needs to be enabled. Also, the maximum number of devices is set to 2 so this needs to be just one if we want the single host to have access and nothing else.

• Question 245:

  Refer to the exhibit:

  

  What will Router1 do when it receives the data frame shown? (Choose three.)

  A. Router1 will strip off the source MAC address and replace it with the MAC address 0000.0c36.6965.
  B. Router1 will strip off the source IP address and replace it with the IP address 192.168.40.1.
  C. Router1 will strip off the destination MAC address and replace it with the MAC address 0000.0c07.4320.
  D. Router1 will strip off the destination IP address and replace it with the IP address of 192.168.40.1.
  E. Router1 will forward the data packet out interface FastEthernet0/1.
  F. Router1 will forward the data packet out interface FastEthernet0/2.
  A. Router1 will strip off the source MAC address and replace it with the MAC address 0000.0c36.6965.
  C. Router1 will strip off the destination MAC address and replace it with the MAC address 0000.0c07.4320.
  F. Router1 will forward the data packet out interface FastEthernet0/2.

  ---

  Remember, the source and destination MAC changes as each router hop along with the TTL being decremented but the source and destination IP address remain the same from source to destination.

• Question 246:

  Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network address?

  A. 172.16.16.0
  B. 172.16.0.0
  C. 172.16.24.0
  D. 172.16.28.0
  A. 172.16.16.0

  ---

  For this example, the network range is 172.16.16.1 - 172.16.31.254, the network address is 172.16.16.0 and the broadcast IP address is 172.16.31.255.

• Question 247:

  An administrator is trying to ping and telnet from SwitchC to RouterC with the results shown below.

  

  Click the console connected to RouterC and issue the appropriate commands to answer the questions.

  

  

  What would be the effect of issuing the command ip access-group 115 in on the s0/0/1 interface?

  A. No host could connect to RouterC through s0/0/1.
  B. Telnet and ping would work but routing updates would fail.
  C. FTP, FTP-DATA, echo, and www would work but telnet would fail.
  D. Only traffic from the 10.4.4.0 network would pass through the interface.
  A. No host could connect to RouterC through s0/0/1.

  ---

  First let's see what was configured on interface S0/0/1:

  

• Question 248:

  Which statement describes VRRP object tracking?

  A. It monitors traffic flow and link utilization.
  B. It ensures the best VRRP router is the virtual router master for the group.
  C. It causes traffic to dynamically move to higher bandwidth links.
  D. It thwarts man-in-the-middle attacks.
  B. It ensures the best VRRP router is the virtual router master for the group.

  ---

  Object tracking is the process of tracking the state of a configured object and uses that state to determine the priority of the VRRP router in a VRRP group.

• Question 249:

  Which two spanning-tree port states does RSTP combine to allow faster convergence? (Choose two.)

  A. blocking
  B. listening
  C. learning
  D. forwarding
  E. discarding
  A. blocking
  B. listening

• Question 250:

  What are the possible trunking modes for a switch port? (Choose three.)

  A. transparent
  B. auto
  C. on
  D. desirable
  E. client
  F. forwarding
  B. auto
  C. on
  D. desirable

  ---

  These are the different types of trunk modes:

  ON: This mode puts the port into permanent trunk mode and negotiates to convert the link into a trunk link. The port becomes a trunk port even if the adjacent port does not agree to the change.

  

  OFF: This mode puts the port into permanent non-trunk mode and negotiates to convert the link into a non-trunk link. The port becomes a non-trunk port even if the adjacent port does not agree to the change.

  

  Desirable: This mode causes the port to actively attempt to convert the link into a trunk link. The port becomes a trunk port if the adjacent port is set to on, desirable, or auto mode.

  

  Auto: This mode enables the port to convert the link into a trunk link. The port becomes a trunk port if the adjacent port is set to on or desirable mode. This is the default mode for Fast and Gigabit Ethernet ports.

  

  Nonegotiate: This mode puts the port into permanent trunk mode, but does not allow the port to generate Dynamic Trunking Protocol (DTP) frames. The adjacent port must be configured manually as a trunk port to establish a trunk link.