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New Cisco 200-125 Exam Dumps Collection (Question 1 - Question 10)
Question No: 1
Which technology supports the stateless assignment of IPv6 addresses?
A. DNS
B. DHCPv6
C. DHCP
D. autoconfiguration
Answer: B
Explanation:
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 No: 2
Scenario:
You work for a company that provides managed network services, and of your real estate clients running a small office is experiencing network issues, Troubleshoot the network issues.
Router R1 connects the main office to internet, and routers R2 and R3 are internal routers NAT is enabled on Router R1.
The routing protocol that is enable between routers R1, R2, and R3 is RIPv2.
R1 sends default route into RIPv2 for internal routers to forward internet traffic to R1. Server1 and Server2 are placed in VLAN 100 and 200 respectively, and dare still running
router on stick configuration with router R2.
You have console access on R1, R2, R3, and L2SW1 devices. Use only show commands to troubleshoot the issues.
Examine R2 configuration, the traffic that is destined to R3 LAN network sourced from Router R2 is forwarded to R1 instead R3. What could be an issue?
A. RIPv2 routing updates are suppressed between R2 and R3 using passive interface feature.
B. RIPv2 enabled on R3, but R3 LAN network that is not advertised into RIPv2 domain.
C. No issue that is identified; this behavior is normal since default route propagated into RIPv2 domain by Router R1.
D. RIPv2 not enabled on R3.
Answer: D
Question No: 3
What is the first step in the NAT configuration process?
A. Define inside and outside interfaces.
B. Define public and private IP addresses.
C. Define IP address pools.
D. Define global and local interfaces.
Answer: A
Question No: 4
Which two pieces of information are provided by the show controllers serial 0 command? (Choose two.)
A. the type of cable that is connected to the interface.
B. The uptime of the interface
C. the status of the physical layer of the interface
D. the full configuration of the interface
E. the interface's duplex settings
Answer: A,C
Explanation:
Theshow controllercommand provides hardware-related information useful to troubleshoot and diagnose issues with Cisco router interfaces. The Cisco 12000 Series uses a distributed architecture with a central command-line interface (CLI) at the Gigabit Route Processor (GRP) and a local CLI at each line card.
Question No: 5
Which two components are used to identify a neighbor in a BGP configuration? (Choose two.)
A. autonomous system number
B. version number
C. router ID
D. subnet mask
E. IP address
Answer: A,E
Explanation:
Use theshow ip bgp neighbors(registeredcustomers only)command to display information about the TCP and Border Gateway Protocol (BGP) connections and verify if the BGP peer is established. The output of theshow ip bgp neighborscommand below shows the BGP state as 'Established', which indicates that the BGP peer relationship has been established successfully.
R1-AGS#show ip bgp neighbors | include BGP
BGP neighbor is10.10.10.2, remote AS 400,internal link
BGP version 4, remote router ID 2.2.2.2 BGP state = Established, up for 00:04:20 BGP table version 1, neighbor version 1 R1-AGS#
Theshow ip bgp neighborscommand has been used above with the modifier| include BGP. This makes the output more readable by filtering the the command output and displaying the relevant parts only.
In addition, theshow ip bgp summary(registeredcustomers only)command can also be used to display the status of all BGP connections, as shown below.
R1-AGS(9)#show ip bgp summary
BGP router identifier 10.1.1.2, local AS number 400 BGP table version is 1, main routing table version 1
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.10.10.2 4 400 3 3 1 0 0 00:00:26 0
Question No: 6
If the primary root bridge experiences a power loss, which switch takes over?
A. switch 0004.9A1A.C182
B. switch 00E0.F90B.6BE3
C. switch 00E0.F726.3DC6
D. switch 0040.0BC0.90C5
Answer: A
Question No: 7
Which three commands must you enter to create a trunk that allows VLAN 20? (Choose three)
A. Switch(config-if)#switchport mode dynamic auto
B. Switch(config-if)#switchport mode trunk
C. Switch(config-if)#switchport trunk allowed vlan 20
D. Switch(config-if)#switchport mode dynamic desirable
E. Switch(config-if)#switchport trunk encapsulation dotlq
F. Switch(config-if)#switchport trunk native vlan 20
Answer: B,E,F
Question No: 8
Which tow options describe benefits of aggregated chassis technology? (Choose two.)
A. It requires only three IP addresses per VLAN.
B. It reduces management overhead.
C. It requires only one IP address per VLAN.
D. It supports redundant configuration files.
E. It supports HSRP, VRRP, and GLBP.
F. Switches can be located anywhere regardless of their physical distance from one another.
Answer: B,C
Question No: 9
Which option is the default switch port port-security violation mode?
A. shutdown
B. protect
C. shutdown vlan
D. restrict
Answer: A
Explanation:
Shutdownu2014This mode is the default violation mode; when in this mode, the switch will automatically force the switchport into an error disabled (err-disable) state when a violation occurs. While in this state, the switchport forwards no traffic. The switchport can be brought out of this error disabled state by issuing theerrdisable recovery causeCLI command or by disabling and reenabling the switchport.
Shutdown VLANu2014This mode mimics the behavior of the shutdown mode but limits the error disabled state the specific violating VLAN.
Question No: 10
Which statement about Cisco Discovery Protocol is true?
A. It is a Cisco-proprietary protocol.
B. It runs on the network layer.
C. It can discover information from routers, firewalls, and switches.
D. It runs on the physical layer and the data link layer.
Answer: A
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