200-125 | 10 Tips For Up to date 200-125 braindumps

Q15. The network administrator has been asked to give reasons for moving from IPv4 to IPv6. What are two valid reasons for adopting IPv6 over IPv4? (Choose two.)

A. no broadcast

B. change of source address in the IPv6 header

C. change of destination address in the IPv6 header

D. Telnet access does not require a password

E. autoconfiguration

F. NAT

Answer: A,E

Explanation:

IPv6 does not use broadcasts, and autoconfiguration is a feature of IPV6 that allows for hosts to automatically obtain an IPv6 address.

Q16. Three switches are connected to one another via trunk ports. Assuming the default switch configuration, which switch is elected as the root bridge for the spanning-tree instance of VLAN 1?

A. the switch with the highest MAC address

B. the switch with the lowest MAC address

C. the switch with the highest IP address

D. the switch with the lowest IP address

Answer: B

Explanation:

Each switch in your network will have a Bridge ID Priority value, more commonly referred to as a BID. This BID is a combination of a default priority value and the switch's MAC address, with the priority value listed first. The lowest BID will win the election process.

For example, if a Cisco switch has the default priority value of 32,768 and a MAC address of 11-22-33-44-55-66, the BID would be 32768:11-22-33-44-55-66. Therefore, if the switch priority is left at the default, the MAC address is the deciding factor in the root bridge election.

Q17. Which term describes a spanning-tree network that has all switch ports in either the blocking or forwarding state?

A. converged

B. redundant

C. provisioned

D. spanned

Answer: A

Explanation:

Spanning Tree Protocol convergence (Layer 2 convergence) happens when bridges and switches have transitioned to either the forwarding or blocking state. When layer 2 is converged, root bridge is elected and all port roles (Root, Designated and Non-Designated) in all switches are selected.

Q18. Which two benefits are provided by using a hierarchical addressing network addressing scheme? (Choose two.)

A. reduces routing table entries

B. auto-negotiation of media rates

C. efficient utilization of MAC addresses

D. dedicated communications between devices

E. ease of management and troubleshooting

Answer: A,E

Explanation:

Here are some of the benefits of hierarchical addressing:

u2711 Reduced number of routing table entriesu2014 whether it is with your Internet routers or your internal routers, you should try to keep your routing tables as small as possible by using route summarization. Route summarization is a way of having a single IP address represent a collection of IP addresses; this is most easily accomplished when you employ a hierarchical addressing plan. By summarizing routes, you can keep your routing table entries (on the routers that receive the summarized routes) manageable, which offers the following benefits:

u2711 Efficient allocation of addressesu2014Hierarchical addressing lets you take advantage of all possible addresses because you group them contiguously.

Reference: http://www.ciscopress.com/articles/article.asp?p=174107

Q19. A network administrator is troubleshooting an EIGRP problem on a router and needs to confirm the IP addresses of the devices with which the router has established adjacency. The retransmit interval and the queue counts for the adjacent routers also need to be checked. What command will display the required information?

A. Router# show ip eigrp adjacency

B. Router# show ip eigrp topology

C. Router# show ip eigrp interfaces

D. Router# show ip eigrp neighbors

Answer: D

Explanation:

Below is an example of the show ip eigrp neighbors command. The retransmit interval (Smooth Round Trip Timer u2013 SRTT) and the queue counts (Q count, which shows the number of queued EIGRP packets) for the adjacent routers are listed:

Q20. What is the function of the command switchport trunk native vlan 999 on a Cisco Catalyst switch?

A. It creates a VLAN 999 interface.

B. It designates VLAN 999 for untagged traffic.

C. It blocks VLAN 999 traffic from passing on the trunk.

D. It designates VLAN 999 as the default for all unknown tagged traffic.

Answer: B

Explanation:

Configuring the Native VLAN for Untagged Traffic

A trunk port configured with 802.1Q tagging can receive both tagged and untagged traffic. By default, the switch forwards untagged traffic in the native VLAN configured for the port. The native VLAN is VLAN 1 by default.

Q21. Which command enables IPv6 forwarding on a Cisco router?

A. ipv6 local

B. ipv6 host

C. ipv6 unicast-routing

D. ipv6 neighbor

Answer: C

Explanation:

To enable IPv6 routing on the Cisco router use the following command: ipv6 unicast-routing

If this command is not recognized, your version of IOS does not support IPv6.

Q22. Which parameter or parameters are used to calculate OSPF cost in Cisco routers?

A. Bandwidth

B. Bandwidth and Delay

C. Bandwidth, Delay, and MTU

D. Bandwidth, MTU, Reliability, Delay, and Load

Answer: A

Explanation:

The well-known formula to calculate OSPF cost is Cost = 108/ Bandwidth

Q23. Which command can you use to manually assign a static IPv6 address to a router interface?

A. ipv6 autoconfig 2001:db8:2222:7272::72/64

B. ipv6 address 2001:db8:2222:7272::72/64

C. ipv6 address PREFIX_1 ::1/64

D. ipv6 autoconfig

Answer: B

Explanation:

To assign an IPv6 address to an interface, use the u201cipv6 addressu201d command and specify the IP address you wish to use.

Q24. Which command enables RSTP on a switch?

A. spanning-tree uplinkfast

B. spanning-tree mode rapid-pvst

C. spanning-tree backbonefast

D. spanning-tree mode mst

Answer: B

Explanation:

Rapid Spanning Tree Protocol (RSTP) is an enhancement of the original STP 802.1D protocol. The RSTP 802.1w protocol is an IEEE open implementation. Cisco has its own proprietary implementation of RSTP, that includes the benefits of its Per-VLAN spanning tree protocols, called Rapid-PVST+.

To activate the Rapid-PVST+ protocol: switch(config)#spanning-tree mode rapid-pvst