100-105 | Downloadable CCENT 100-105 dumps

New Questions 10

Scenario:

You are a junior network engineer for a financial company, and the main office network is experiencing network issues. Troubleshoot the network issues.

Router R1 connects the main office to the internet, and routers R2 and R3 are internal routers.

NAT is enabled on router R1.

The routing protocol that is enabled between routers R1, R2 and R3 is RIPv2.

R1 sends the default route into RIPv2 for the internal routers to forward internet traffic to R1.

You have console access on R1, R2 and R3 devices. Use only show commands to troubleshoot the issues.

Examine the DHCP configuration between R2 and R3; R2 is configured as the DHCP server and R3 as the client. What is the reason R3 is not receiving the IP address via DHCP?

A. On R2. The network statement In the DHCP pool configuration is incorrectly configured.

B. On R3. DHCP is not enabled on the interface that is connected to R2.

C. On R2, the interface that is connected to R3 is in shutdown condition.

D. On R3, the interface that is connected to R2 is in shutdown condition.

Answer: B

Explanation:

Please check the below:

New Questions 11

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.

New Questions 12

When you use the ping command to send ICMP messages across a network, what's the most common request/reply pair you'll see? (Select one answer choice)

A. Echo request and Echo reply

B. ICMP hold and ICMP send

C. ICMP request and ICMP reply

D. Echo off and Echo on

Answer: A

New Questions 13

Which form of NAT maps multiple private IP addresses to a single registered IP address by using different ports?

A. static NAT

B. dynamic NAT

C. overloading

D. overlapping

E. port loading

Answer: C

New Questions 14

Which statement about native VLAN traffic is true?

A. Cisco Discovery Protocol traffic travels on the native VLAN by default

B. Traffic on the native VLAN is tagged with 1 by default

C. Control plane traffic is blocked on the native VLAN.

D. The native VLAN is typically disabled for security reasons

Answer: A

New Questions 15

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.

Answer: B

Explanation: http://www.cisco.com/c/en/us/support/docs/lan-switching/inter-vlan-routing/41860-howto-L3-intervlanrouting.html

New Questions 16

Refer to the exhibit. Which statement is correct regarding the results shown for the show interface s0/0/0 command?

A. The subnet mask for this interface is 255.255.255.248.

B. The subnet mask for this interface is 255.255.255.252.

C. The IP address that is configured on s0/0/0 is a public address.

D. This interface can be enabled by issuing a no shutdown command.

E. The default encapsulation protocol for a Cisco serial interface is PPP.

Answer: D

New Questions 17

Which NTP command configures the local device as an NTP reference clock source?

A. ntp peer

B. ntp broadcast

C. ntp master

D. ntp server

Answer: D

New Questions 18

The internetwork shown in the diagram is experiencing network connectivity problems.

What is the cause of the problem?

A. The cabling connecting host A to Switch3 is too long.

B. The address of host B is a broadcast address.

C. The IP address of interface Fa0/0 of Router1 is not a usable address.

D. The cable connecting Switch2 and Switch3 should be a crossover.

E. The IP address of Server 1 is in the wrong subnet.

Answer: D

New Questions 19

Refer to the exhibit.

What value should be displayed in Box 1 of the ipconfig output of host A?

A. 172.18.14.5

B. 172.18.14.6

C. 192.168.1.10

D. 192.168.1.11

E. 192.168.1.250

F. 192.168.1.254

Answer: F