Cisco 200-120 Online Practice Questions and Exam Preparation

Cisco 200-120 Online Questions & Answers

• Question 341:

  Which two protocols are used by bridges and/or switches to prevent loops in a layer 2 network? (Choose two.)

  A. 802.1d
  B. VTP
  C. 802.1q
  D. STP E. SAP
  A. 802.1d
  D. STP E. SAP

  ---

  This question is to examine the STP protocol.

  STP (802.1d) is used to prevent Layer 2 loops.

  802.1q is a Frame Relay protocol which belongs to VLAN.

  SAP is a concept of the OSI model.

• Question 342:

  Refer to the exhibit.

  

  A technician is troubleshooting host connectivity issues on the switches. The hosts in VLANs 10 and 15 on Sw11 are unable to communicate with hosts in the same VLANs on Sw12. Hosts in the Admin VLAN are able to communicate. The port-to-VLAN assignments are identical on the two switches. What could be the problem?

  A. The Fa0/1 port is not operational on one of the switches.
  B. The link connecting the switches has not been configured as a trunk.
  C. At least one port needs to be configured in VLAN 1 for VLANs 10 and 15 to be able to communicate.
  D. Port FastEthernet 0/1 needs to be configured as an access link on both switches.
  E. A router is required for hosts on SW11 in VLANs 10 and 15 to communicate with hosts in the same VLAN on Sw12.
  B. The link connecting the switches has not been configured as a trunk.

  ---

  In order for hosts in the same VLAN to communicate with each other over multiple switches, those switches need to be configured as trunks on their connected interfaces so that they can pass traffic from multiple VLANs.

• Question 343:

  Before installing a new, upgraded version of the IOS, what should be checked on the router, and which command should be used to gather this information? (Choose two.)

  A. the amount of available ROM
  B. the amount of available flash and RAM memory
  C. the version of the bootstrap software present on the router
  D. show version
  E. show processes
  F. show running-config
  B. the amount of available flash and RAM memory
  D. show version

  ---

  When upgrading a new version of the IOS we need to copy the IOS to the Flash so first we have to check if the Flash has enough memory or not. Also running the new IOS may require more RAM than the older one so we should check the available RAM too. We can check both with the "show version" command.

• Question 344:

  Which three are the components of SNMP? (Choose three)

  A. MIB
  B. SNMP Manager
  C. SysLog Server
  D. SNMP Agent
  E. Set
  A. MIB
  B. SNMP Manager
  D. SNMP Agent

  ---

  SNMP is an application-layer protocol that provides a message format for communication between SNMP managers and agents. SNMP provides a standardized framework and a common language used for the monitoring and management

  of devices in a network.

  The SNMP framework has three parts:

  +

  An SNMP manager

  +

  An SNMP agent

  +

  A Management Information Base (MIB)

  The SNMP manager is the system used to control and monitor the activities of network hosts using SNMP. The most common managing system is called a Network Management System (NMS). The term NMS can be applied to either a dedicated device used for network management, or the applications used on such a device. A variety of network management applications are available for use with SNMP. These features range from simple command-line applications to feature-rich graphical user interfaces (such as the CiscoWorks2000 line of products).

  The SNMP agent is the software component within the managed device that maintains the data for the device and reports these data, as needed, to managing systems. The agent and MIB reside on the routing device (router, access server, or switch). To enable the SNMP agent on a Cisco routing device, you must define the relationship between the manager and the agent.

  The Management Information Base (MIB) is a virtual information storage area for network management information, which consists of collections of managed objects.

• Question 345:

  Which two statements about using the CHAP authentication mechanism in a PPP link are true? (Choose two.)

  A. CHAP uses a two-way handshake.
  B. CHAP uses a three-way handshake.
  C. CHAP authentication periodically occurs after link establishment.
  D. CHAP authentication passwords are sent in plaintext.
  E. CHAP authentication is performed only upon link establishment.
  F. CHAP has no protection from playback attacks.
  B. CHAP uses a three-way handshake.
  C. CHAP authentication periodically occurs after link establishment.

  ---

  CHAP is an authentication scheme used by Point to Point Protocol (PPP) servers to validate the identity of remote clients. CHAP periodically verifies the identity of the client by using a three-way handshake. This happens at the time of establishing the initial link (LCP), and may happen again at any time afterwards. The verification is based on a shared secret (such as the client user's password).

• Question 346:

  Which three statements about static routing are true? (Choose three.)

  A. It uses consistent route determination.
  B. It is best used for small-scale deployments.
  C. Routing is disrupted when links fail.
  D. It requires more resources than other routing methods.
  E. It is best used for large-scale deployments.
  F. Routers can use update messages to reroute when links fail.
  A. It uses consistent route determination.
  B. It is best used for small-scale deployments.
  C. Routing is disrupted when links fail.

• Question 347:

  Which command is used to display the collection of OSPF link states?

  A. show ip ospf link-state
  B. show ip ospf lsa database
  C. show ip ospf neighbors
  D. show ip ospf database
  D. show ip ospf database

  ---

  The "show ip ospf database" command displays the link states. Here is an example: Here is the lsa database on R2.

  

• Question 348:

  Refer to the exhibit.

  

  A frame on VLAN 1 on switch S1 is sent to switch S2 where the frame is received on VLAN 2. What causes this behavior?

  A. trunk mode mismatches
  B. allowing only VLAN 2 on the destination
  C. native VLAN mismatches
  D. VLANs that do not correspond to a unique IP subnet
  C. native VLAN mismatches

  ---

  Untagged frames are encapsulated with the native VLAN. In this case, the native VLANs are different so although S1 will tag it as VLAN 1 it will be received by S2.

• Question 349:

  What command is used to verify the DLCI destination address in a Frame Relay static configuration?

  A. show frame-relay pvc
  B. show frame-relay lmi
  C. show frame-relay map
  D. show frame relay end-to-end
  C. show frame-relay map

  ---

  Sample "show frame-relay map" output:

  R1#sh frame map

  Serial0/0 (up): ip 10.4.4.1 dlci 401(0x191,0x6410), dynamic,

  broadcast,, status defined, active

  Serial0/0 (up): ip 10.4.4.3 dlci 403(0x193,0x6430), dynamic,

  broadcast,, status defined, active

  Serial0/0 (up): ip 10.4.4.4 dlci 401(0x191,0x6410), static,

  CISCO, status defined, active

• Question 350:

  Refer to the exhibit.

  

  Which rule does the DHCP server use when there is an IP address conflict?

  A. The address is removed from the pool until the conflict is resolved.
  B. The address remains in the pool until the conflict is resolved.
  C. Only the IP detected by Gratuitous ARP is removed from the pool.
  D. Only the IP detected by Ping is removed from the pool.
  E. The IP will be shown, even after the conflict is resolved.
  A. The address is removed from the pool until the conflict is resolved.

  ---

  An address conflict occurs when two hosts use the same IP address. During address assignment, DHCP checks for conflicts using ping and gratuitous ARP. If a conflict is detected, the address is removed from the pool. The address will not

  be assigned until the administrator resolves the conflict.

  (Reference: http://www.cisco.com/en/US/docs/ios/12_1/iproute/configuration/guide/1cddhcp.html)