icnd2 200-105 PDF Practice Questions

By | December 23, 2019

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Question No. 1

Which technology can provide security when connection multiple sites across the internet?

Answer: B

Question No. 2

Which event triggers a switch stack election?

Answer: C

Question No. 3

Which three are characteristics of an IPv6 anycast address? (Choose three.)

Answer: B, E, F

Question No. 4

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

true?

Answer: B

Question No. 5

Which three statements about RSTP are true? (Choose three.)

Answer: A, B, D

http://www.cisco.com/en/US/tech/tk389/tk621/technologies_white_paper09186a0080094cfa.shtml

Convergence

Cisco enhanced the original 802.1D specification with features such as Uplink Fast, Backbone Fast, and Port Fast to speed up the convergence time of a bridged network. The drawback is that these mechanisms are proprietary and need additional configuration.

Alternate and Backup Port Roles

These two port roles correspond to the blocking state of 802.1D. A blocked port is defined as not being the designated or root port. A blocked port receives a more useful BPDU than the one it sends out on its segment.

Remember that a port absolutely needs to receive BPDUs in order to stay blocked. RSTP introduces these two roles for this purpose.

Rapid Transition to Forwarding State

Rapid transition is the most important feature introduced by 802.1w. The legacy STA passively waited for the network to converge before it turned a port into the forwarding state. The achievement of faster convergence was a matter of tuning the conservative default parameters (forward delay and max_age timers) and often put the stability of the network at stake. The new rapid STP is able to actively confirm that a port can safely transition to the forwarding state without having to rely on any timer configuration. There is now a real feedback mechanism that takes place between RSTP-compliant bridges. In order to achieve fast convergence on a port, the protocol relies upon two new variables: edge ports and link type.

Question No. 6

Which two Cisco IOS commands, used in troubleshooting, can enable debug output to a remote location?

(Choose two)

Answer: B, C

Question No. 7

Which device classes are used over serial links? (Choose two)

Answer: A, B

Question No. 8

Refer to the exhibit.

C-router is to be used as a “router-on-a-stick” to route between the VLANs. All the interfaces have been properly configured and IP routing is operational. The hosts in the VLANs have been configured with the appropriate default gateway. What is true about this configuration?

Answer: D

Question No. 9

Which statement about the IP SLAs ICMP Echo operation is true?

Answer: C

Question No. 10

A network administrator has configured access list 173 to prevent Telnet and ICMP traffic from reaching a server with the address of 192.168.13.26. Which commands can the administrator issue to verify that the access list is working properly? (Choose three.)

Answer: A, D, E

Question No. 11

Which command do you enter to protect a PortFast-enabled port against unauthorized switches on the

network?

Answer: B

Question No. 12

In GLBP, which router will respond to client ARP requests?

Answer: A

GLBP Virtual MAC Address Assignment

A GLBP group allows up to four virtual MAC addresses per group. The AVG is responsible for assigning the virtual MAC addresses to each member of the group. Other group members request a virtual MAC address after they discover the AVG through hello messages. Gateways are assigned the next MAC address in sequence. A virtual forwarder that is assigned a virtual MAC address by the AVG is known as a primary virtual forwarder. Other members of the GLBP group learn the virtual MAC addresses from hello messages. A virtual forwarder that has learned the virtual MAC address is referred to as a secondary virtual forwarder.

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html

Question No. 13

To which two categories of routing protocols does BGP belong? (Choose two.)

Answer: C, E

Question No. 14

Which options are the two differences between HSRP versions 1 and 2? (Choose two.)

Answer: E, F

HSRP version 2 is designed to address the following restrictions in HSRP version 1:

In HSRP version 1, millisecond timer values are not advertised or learned. HSRP version 2 advertises and

learns millisecond timer values. This change ensures stability of the HSRP groups in all cases.

In HSRP version 1, group numbers are restricted to the range from 0 to 255. HSRP version 2 expands the

group number range from 0 to 4095.

HSRP version 2 provides improved management and troubleshooting. With HSRP version 1, you cannot

use HSRP active hello messages to identify which physical router sent the message because the source

MAC address is the HSRP virtual MAC address. The HSRP version 2 packet format includes a 6-byte

identifier field that is used to uniquely identify the sender of the message. Typically, this field is populated

with the interface MAC address.

The multicast address 224.0.0.2 is used to send HSRP hello messages. This address can conflict with

Cisco Group Management Protocol (CGMP) leave processing.

HSRP version 2 uses the new IP multicast address 224.0.0.102 to send hello packets instead of the multicast

address of 224.0.0.2, used by HSRP version 1. This new multicast address allows CGMP leave processing to

be enabled at the same time as HSRP.

HSRP version 2 permits an expanded group number range, 0 to 4095, and consequently uses a new MAC

address range 0000.0C9F.F000 to 0000.0C9F.FFFF. The increased group number range does not imply that

an interface can, or should, support that many HSRP groups. The expanded group number range was

changed to allow the group number to match the VLAN number on subinterfaces.

When the HSRP version is changed, each group will reinitialize because it now has a new virtual MAC

address.

HSRP version 2 has a different packet format than HSRP version 1. The packet format uses a type-lengthvalue

(TLV) format. HSRP version 2 packets received by an HSRP version 1 router will have the type field

mapped to the version field by HSRP version 1 and subsequently ignored.

Question No. 15

Which command must you enter to enable OSPFV2 in an IPV4 network?

Answer: D

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