Cisco 200-120 Online Practice Questions and Exam Preparation

Cisco 200-120 Online Questions & Answers

• Question 71:

  Which command shows your active Telnet connections?

  A. show cdp neigbors
  B. show session
  C. show users
  D. show vty logins
  B. show session

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  The "show users" shows telnet/ssh connections to your router while "show sessions" shows telnet/ssh connections from your router (to other devices). The question asks about "your active Telnet connections", meaning connections from your router so the answer should be A.

• Question 72:

  What command instructs the device to timestamp Syslog debug messages in milliseconds?

  A. service timestamps log datetime localtime
  B. service timestamps debug datetime msec
  C. service timestamps debug datetime localtime
  D. service timestamps log datetime msec
  B. service timestamps debug datetime msec

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  Enable millisecond (msec) timestamps using the service timestamps command:

  router(config)#service timestamps debug datetime msec.

  router(config)#service timestamps log datetime msec The "service timestamps debug".

  command configures the system to apply a time stamp to debugging messages. The time-stamp format for datetime is MMM DD HH:MM:SS, where MMM is the month, DD is the date, HH is the hour (in 24-hour notation), MM is the minute,

  and SS is the second. With the additional keyword msec, the system includes milliseconds in the time stamp, in the format HH:DD:MM:SS.mmm, where .mmm is milliseconds.

• Question 73:

  What are two characteristics of Frame Relay point-to-point subinterfaces? (Choose two.)

  A. They create split-horizon issues.
  B. They require a unique subnet within a routing domain.
  C. They emulate leased lines.
  D. They are ideal for full-mesh topologies.
  E. They require the use of NBMA options when using OSPF.
  B. They require a unique subnet within a routing domain.
  C. They emulate leased lines.

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  Subinterfaces are used for point to point frame relay connections, emulating virtual point to point leased lines. Each subinterface requires a unique IP address/subnet. Remember, you cannot assign multiple interfaces in a router that belong to the same IP subnet.

• Question 74:

  VLAN 3 is not yet configured on your switch. What happens if you set the switchport access vlan 3 command in interface configuration mode?

  A. The command is rejected.
  B. The port turns amber.
  C. The command is accepted and the respective VLAN is added to vlan.dat.
  D. The command is accepted and you must configure the VLAN manually.
  C. The command is accepted and the respective VLAN is added to vlan.dat.

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  The "switchport access vlan 3" will put that interface as belonging to VLAN 3 while also updated the VLAN database automatically to include VLAN 3.

• Question 75:

  How many bits are contained in each field of an IPv6 address?

  A. 24
  B. 4
  C. 8
  D. 16
  D. 16

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  An IPv6 address is represented as eight groups of four hexadecimal digits, each group representing 16 bits (two octets). The groups are separated by colons (:). An example of an IPv6 address is 2001:0db8:85a3:0000:0000:8a2e:0370:7334.

• Question 76:

  For what two purposes does the Ethernet protocol use physical addresses? (Choose two.)

  A. to uniquely identify devices at Layer 2
  B. to allow communication with devices on a different network
  C. to differentiate a Layer 2 frame from a Layer 3 packet
  D. to establish a priority system to determine which device gets to transmit first
  E. to allow communication between different devices on the same network
  F. to allow detection of a remote device when its physical address is unknown
  A. to uniquely identify devices at Layer 2
  E. to allow communication between different devices on the same network

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  Physical addresses or MAC addresses are used to identify devices at layer 2.

  MAC addresses are only used to communicate on the same network. To communicate on different network we have to use Layer 3 addresses (IP addresses) -> B is not correct.

  Layer 2 frame and Layer 3 packet can be recognized via headers. Layer 3 packet also contains physical address ->.

  On Ethernet, each frame has the same priority to transmit by default ->.

  All devices need a physical address to identify itself. If not, they cannot communicate ->.

• Question 77:

  Which three statements about IPv6 prefixes are true? (Choose three.)

  A. FF00:/8 is used for IPv6 multicast.
  B. FE80::/10 is used for link-local unicast.
  C. FC00::/7 is used in private networks.
  D. 2001::1/127 is used for loopback addresses.
  E. FE80::/8 is used for link-local unicast.
  F. FEC0::/10 is used for IPv6 broadcast.
  A. FF00:/8 is used for IPv6 multicast.
  B. FE80::/10 is used for link-local unicast.
  C. FC00::/7 is used in private networks.

• Question 78:

  Which three statements about the features of SNMPv2 and SNMPv3 are true? (Choose three.)

  A. SNMPv3 enhanced SNMPv2 security features.
  B. SNMPv3 added the Inform protocol message to SNMP.
  C. SNMPv2 added the Inform protocol message to SNMP.
  D. SNMPv3 added the GetBulk protocol messages to SNMP.
  E. SNMPv2 added the GetBulk protocol message to SNMP.
  F. SNMPv2 added the GetNext protocol message to SNMP.
  A. SNMPv3 enhanced SNMPv2 security features.
  C. SNMPv2 added the Inform protocol message to SNMP.
  E. SNMPv2 added the GetBulk protocol message to SNMP.

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  SNMPv1/v2 can neither authenticate the source of a management message nor provide encryption. Without authentication, it is possible for nonauthorized users to exercise SNMP network management functions. It is also possible for nonauthorized users to eavesdrop on management information as it passes from managed systems to the management system. Because of these deficiencies, many SNMPv1/v2 implementations are limited to simply a read-only capability, reducing their utility to that of a network monitor; no network control applications can be supported. To correct the security deficiencies of SNMPv1/v2, SNMPv3 was issued as a set of Proposed Standards in January 1998. -> A is correct. The two additional messages are added in SNMP2 (compared to SNMPv1)

  GetBulkRequest The GetBulkRequest message enables an SNMP manager to access large chunks of data. GetBulkRequest allows an agent to respond with as much information as will fit in the response PDU. Agents that cannot provide values for all variables in a list will send partial information. -> E is correct.

  InformRequest The InformRequest message allows NMS stations to share trap information. (Traps are issued by SNMP agents when a device change occurs.) InformRequest messages are generally used between NMS stations, not between NMS stations and agents. -> C is correct.

  Note: These two messages are carried over SNMPv3.

• Question 79:

  Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security mechanisms?

  A. HDLC
  B. PPP
  C. X.25
  D. Frame Relay
  B. PPP

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  PPP: Provides router-to-router and host-to-network connections over synchronous and asynchronous circuits. PPP was designed to work with several network layer protocols, including IP. PPP also has built-in security mechanisms, such as Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP).

• Question 80:

  Refer to the exhibit.

  

  Which statement describes DLCI 17?

  A. DLCI 17 describes the ISDN circuit between R2 and R3.
  B. DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.
  C. DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.
  D. DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.
  C. DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.

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  DLCI-Data Link Connection Identifier Bits: The DLCI serves to identify the virtual connection so that the receiving end knows which information connection a frame belongs to. Note that this DLCI has only local significance. Frame Relay is strictly a Layer 2 protocol suite.