Cisco 200-125 Online Practice Questions and Exam Preparation

Cisco 200-125 Online Questions & Answers

• Question 1121:

  Which type of device can be replaced by the use of subinterfaces for VLAN routing?

  A. Layer 2 bridge
  B. Layer 2 switch
  C. Layer 3 switch
  D. router
  C. Layer 3 switch

• Question 1122:

  Refer to the exhibit.

  

  IF R1 sends traffic to 192.168.101.45 the traffic is sent through which interface?

  A. FastEthernet0/1
  B. FastEthernet0/0
  C. FastEthernet1/0
  D. FastEthernet1/1
  D. FastEthernet1/1

• Question 1123:

  Which commands are required to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0? (Choose two.)

  A. Router(config)# router ospf 0
  B. Router(config)# router ospf 1
  C. Router(config)# router ospf area 0
  D. Router(config-router)# network 192.168.16.0 0.0.0.255 0
  E. Router(config-router)# network 192.168.16.0 0.0.0.255 area 0
  F. Router(config-router)# network 192.168.16.0 255.255.255.0 area 0
  B. Router(config)# router ospf 1
  E. Router(config-router)# network 192.168.16.0 0.0.0.255 area 0

  ---

  In the router ospf command, the ranges from 1 to 65535 so o is an invalid number -> but To configure OSPF, we need a wildcard in the "network" statement, not a subnet mask. We also need to assgin an area to this process ->.

• Question 1124:

  Under which two circumstances is a switch port that is configured with PortFast BPDU guard error- disable?(choose two)

  A. when the switch receives a request for an IP address from an individual PC
  B. when the switch receives a BPDU from a connected switch
  C. when a wireless access point running in bridge mode is connected to a switch
  D. when a single IP address is configured on the switch
  E. when a connected server has more than one VLAN configured on its NIC
  B. when the switch receives a BPDU from a connected switch
  C. when a wireless access point running in bridge mode is connected to a switch

• Question 1125:

  Drag and Drop

  Select and Place:

  

  

• Question 1126:

  Refer to the exhibit.

  

  In the Frame Relay network, which IP addresses would be assigned to the interfaces with point-to-point PVCs?

  A. DLCI 16: 192.168.10.1 /24 DLCI 17: 192.168.10.1 /24 DLCI 99: 192.168.10.2 /24 DLCI 28: 192.168.10.3 /24
  B. DLCI 16: 192.168.10.1 /24 DLCI 17: 192.168.11.1 /24 DLCI 99: 192.168.12.1 /24 DLCI 28: 192.168.13.1 /24
  C. DLCI 16: 192.168.10.1 /24 DLCI 17: 192.168.11.1 /24 DLCI 99: 192.168.10.2 /24 DLCI 28: 192.168.11.2 /24
  D. DLCI 16: 192.168.10.1 /24 DLCI 17: 192.168.10.2 /24 DLCI 99: 192.168.10.3 /24 DLCI 28: 192.168.10.4 /24
  C. DLCI 16: 192.168.10.1 /24 DLCI 17: 192.168.11.1 /24 DLCI 99: 192.168.10.2 /24 DLCI 28: 192.168.11.2 /24

  ---

  With point to point PVC's, each connection needs to be in a separate subnet. The R2-R1 connection (DLCI 16 to 99) would have each router within the same subnet. Similarly, the R3-R1 connection would also be in the same subnet, but it must be in a different one than the R2-R1 connection.

• Question 1127:

  Which technology supports the stateless assignment of IPv6 addresses?

  A. DNS
  B. DHCPv6
  C. DHCP
  D. autoconfiguration
  B. DHCPv6
  D. autoconfiguration

  ---

  DHCPv6 Technology Overview IPv6 Internet Address Assignment Overview IPv6 has been developed with Internet Address assignment dynamics in mind. Being aware that IPv6 Internet addresses are 128 bits in length and written in hexadecimals makes automation of address-assignment an important aspect within network design. These attributes make it inconvenient for a user to manually assign IPv6 addresses, as the format is not naturally intuitive to the human eye. To facilitate address assignment with little or no human intervention, several methods and technologies have been developed to automate the process of address and configuration parameter assignment to IPv6 hosts. The various IPv6 address assignment methods are as follows:

  1.

  Manual Assignment

  An IPv6 address can be statically configured by a human operator. However, manual assignment is quite open to errors and operational overhead due to the 128 bit length and hexadecimal attributes of the addresses, although for router

  interfaces and static network elements and resources this can be an appropriate solution.

  2.

  Stateless Address Autoconfiguration (RFC2462)

  Stateless Address Autoconfiguration (SLAAC) is one of the most convenient methods to assign Internet addresses to IPv6 nodes. This method does not require any human intervention at all from an IPv6 user. If one wants to use IPv6 SLAAC

  on an IPv6 node, it is important that this IPv6 node is connected to a network with at least one IPv6 router connected. This router is configured by the network administrator and sends out Router Advertisement announcements onto the link.

  These announcements can allow the on-link connected IPv6 nodes to configure themselves with IPv6 address and routing parameters, as specified in RFC2462, without further human intervention.

  3.

  Stateful DHCPv6

  The Dynamic Host Configuration Protocol for IPv6 (DHCPv6) has been standardized by the IETF through RFC3315. DHCPv6 enables DHCP servers to pass configuration parameters, such as IPv6 network addresses, to IPv6 nodes. It offers

  the capability of automatic allocation of reusable network addresses and additional configuration flexibility. This protocol is a stateful counterpart to "IPv6 Stateless Address Autoconfiguration" (RFC 2462), and can be used separately, or in

  addition to the stateless autoconfiguration to obtain configuration parameters.

  4.

  DHCPv6-PD

  DHCPv6 Prefix Delegation (DHCPv6-PD) is an extension to DHCPv6, and is specified in RFC3633. Classical DHCPv6 is typically focused upon parameter assignment from a DHCPv6 server to an IPv6 host running a DHCPv6 protocol stack.

  A practical example would be the stateful address assignment of "2001:db8::1" from a DHCPv6 server to a DHCPv6 client. DHCPv6-PD however is aimed at assigning complete subnets and other network and interface parameters from a

  DHCPv6-PD server to a DHCPv6-PD client. This means that instead of a single address assignment, DHCPv6-PD will assign a set of IPv6 "subnets". An example could be the assignment of "2001:db8::/60" from a DHCPv6-PD server to a

  DHCPv6-PD client. This will allow the DHCPv6-PD client (often a CPE device) to segment the received address IPv6 address space, and assign it dynamically to its IPv6 enabled interfaces.

  5.

  Stateless DHCPv6

  Stateless DHCPv6 is a combination of "stateless Address Autoconfiguration" and "Dynamic Host Configuration Protocol for IPv6" and is specified by RFC3736. When using stateless- DHCPv6, a device will use Stateless Address Auto-

  Configuration (SLAAC) to assign one or more IPv6 addresses to an interface, while it utilizes DHCPv6 to receive "additional parameters" which may not be available through SLAAC. For example, additional parameters could include

  information such as DNS or NTP server addresses, and are provided in a stateless manner by DHCPv6. Using stateless DHCPv6 means that the DHCPv6 server does not need to keep track of any state of assigned IPv6 addresses, and

  there is no need for state refreshment as result. On network media supporting a large number of hosts associated to a single DHCPv6 server, this could mean a significant reduction in DHCPv6 messages due to the reduced need for address

  state refreshments. From Cisco IOS 12.4(15)T onwards the client can also receive timing information, in addition to the "additional parameters" through DHCPv6. This timing information provides an indication to a host when it should refresh

  its DHCPv6 configuration data. This behavior (RFC4242) is particularly useful in unstable environments where changes are likely to occur.

• Question 1128:

  Refer to the exhibit.

  

  For what two reasons has the router loaded its IOS image from the location that is shown? (Choose two.)

  A. Router1 has specific boot system commands that instruct it to load IOS from a TFTP server.
  B. Router1 is acting as a TFTP server for other routers.
  C. Router1 cannot locate a valid IOS image in flash memory.
  D. Router1 defaulted to ROMMON mode and loaded the IOS image from a TFTP server.
  E. Cisco routers will first attempt to load an image from TFTP for management purposes.
  A. Router1 has specific boot system commands that instruct it to load IOS from a TFTP server.
  C. Router1 cannot locate a valid IOS image in flash memory.

  ---

  The loading sequence of CISCO IOS is as follows: Booting up the router and locating the Cisco IOS

  1.

  POST (power on self-test)

  2.

  Bootstrap code executed

  3.

  Check Configuration Register value (NVRAM) which can be modified using the config- register command

  0 = ROM Monitor mode 1 = ROM IOS 2 - 15 = startup-config in NVRAM

  4.

  Startup-config filE. Check for boot system commands (NVRAM) If boot system commands in startup-config

  a.

  Run boot system commands in order they appear in startup-config to locate the IOS b. [If boot system commands fail, use default fallback sequence to locate the IOS (Flash, TFTP, ROM)?] If no boot system commands in startup-config use the default fallback sequence in locating the IOS:

  a.

  Flash (sequential)

  b.

  TFTP server (netboot)

  c.

  ROM (partial IOS) or keep retrying TFTP depending upon router model

  5. If IOS is loaded, but there is no startup-config file, the router will use the default fallback sequence for locating the IOS and then it will enter setup mode or the setup dialogue.

• Question 1129:

  Drag and drop the BGP terms from the left onto the correct descriptions on the right.

  Select and Place:

  

  

• Question 1130:

  Two hosts are attached to a switch with the default configuration. Which statement about the configuration is true?

  A. IP routing must be enabled to allow the two hosts to communicate.
  B. The two hosts are in the same broadcast domain.
  C. The switch must be configured with a VLAN to allow the two hosts to communicate.
  D. Port security prevents the hosts from connecting to the switch.
  B. The two hosts are in the same broadcast domain.