Cisco 640-864 Online Practice Questions and Exam Preparation

Cisco 640-864 Online Questions & Answers

• Question 181:

  What is the most compact representation of the following IPv6 address?

  2001:db8:0000:0000:cafe:0000:0000:1234

  A. 2001:db8::cafe::1234
  B. 2001:db8::cafe:0000:0000:1234
  C. 2001:db8:0:0:cafe::1234
  D. 2001:db8::cafe:0:1234
  C. 2001:db8:0:0:cafe::1234

• Question 182:

  What are the three primary functions of the distribution layer of the campus network design hierarchy? (Choose three.)

  A. provide end-user connectivity
  B. provide high speed transport
  C. provide QoS services
  D. enforce security policies
  E. provide WAN connections
  F. connect access devices to the core backbone
  C. provide QoS services
  D. enforce security policies
  F. connect access devices to the core backbone

• Question 183:

  With deterministic Wireless LAN Controller redundancy design, the different options available to the designer have their own strengths. Which one of these statements is an example of such a strength?

  A. Dynamic load balancing, or salt-and-pepper access point design, avoids the potential impact of oversubscription on aggregate network performance.
  B. N+N redundancy configuration allows logically grouping access points on controllers to minimize intercontroller roaming events.
  C. N+N+1 redundancy configuration has the least impact to system management because all of the controllers are colocated in an NOC or data center.
  D. N+1 redundancy configuration uses Layer 3 intercontroller roaming, maintaining traffic on the same subnet for more efficiency.
  B. N+N redundancy configuration allows logically grouping access points on controllers to minimize intercontroller roaming events.

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  With such an arrangement there is no complex mesh of access points and controllers. Link: http://www.cisco.com/web/learning/le31/le46/cln/qlm/CCDA/ design/understanding- wireless-network-controller-technology-3/player.html

  N+N WLC Redundancy With N+N redundancy, shown in Figure 5-14. an equal number of controllers hack up each other. For example, a pair of WLCs on one floor serves as a backup to a second pair on another floor. The top WLC is primary for API and AP2 and secondary for AP3 and AP4. The bottom WLC is primary for AP3 and AP4 and secondary for API and AP2. There should be enough capacity on each controller to manage a failover situation.

  

  N+N+1 WLC Redundancy With N+N+1 redundancy, shown in Figure 5-15, an equal number of controllers back up each other (as with N+N), plus a backup WLC is configured as the tertiary WLC for the APs. N+N+1 redundancy functions the same as N+N redundancy plus a tertiary controller that backs up the secondary controllers. The tertiary WLC is placed in the data center or network operations center

  

• Question 184:

  Which one of these statements is an example of how trust and identity management solutions should be deployed in the enterprise campus network?

  A. Authentication validation should be deployed as close to the data center as possible.
  B. Use the principle of top-down privilege, which means that each subject should have the privileges that are necessary to perform their defined tasks, as well as all the tasks for those roles below them.
  C. Mixed ACL rules, using combinations of specific sources and destinations, should be applied as close to the source as possible.
  D. For ease of management, practice defense in isolation - security mechanisms should be in place one time, in one place.
  C. Mixed ACL rules, using combinations of specific sources and destinations, should be applied as close to the source as possible.

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  Validating user authentication should be implemented as close to the source as possible, with an emphasis on strong authentication for access from untrusted networks. Access rules should enforce policy deployed throughout the network

  with the following guidelines:

  Source-specific rules with any type destinations should be applied as close to the source as possible.

  Destination-specific rules with any type sources should be applied as close to the destination as possible.

  Mixed rules integrating both source and destination should be used as close to the source as possible.

  An integral part of identity and access control deployments is to allow only the necessary access. Highly distributed rules allow for greater granularity and scalability but, unfortunately, increase the management complexity. On the other hand,

  centralized rule deployment eases management but lacks flexibility and scalability.

  Practicing "defense in depth" by using security mechanisms that back each other up is an important concept to understand. For example, the perimeter Internet routers should use ACLs to filter packets in addition to the firewall inspecting

  packets at a deeper level.

  Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 13

• Question 185:

  Which two statements best describe an OSPF deployment? (Choose two.)

  A. ABR provides automatic classful network boundary summarization.
  B. ABR requires manual configuration for classful network summarization.
  C. External routes are propagated into the autonomous system from stub areas via ASBR.
  D. External routes are propagated into the autonomous system from regular areas or NSSA via ASBR.
  E. External routes are propagated into the autonomous system from regular areas or NSSA via ABR.
  B. ABR requires manual configuration for classful network summarization.
  D. External routes are propagated into the autonomous system from regular areas or NSSA via ASBR.

• Question 186:

  Which two can be used as a branch office WAN solution? (Choose two.)

  A. frame relay
  B. MPLS
  C. Metro Ethernet
  D. GPRS
  E. dial-up modem
  F. 3G USB modems
  B. MPLS
  C. Metro Ethernet

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  Frame relay is old 'shared' technology today's sites use some flavor or Metro E or MPLS/VPN

• Question 187:

  The enterprise campus core layer has requirements that are unique from the distribution and access layers. Which of the following is true about the core layer?

  A. The core layer provides convergence using Layer 2 and Layer 3 services and features.
  B. The core layer provides high availability to support the distribution layer connections to the enterprise edge.
  C. The campus core layer is optional.
  D. The core layer requires high performance to manage the traffic policing across the backbone.
  B. The core layer provides high availability to support the distribution layer connections to the enterprise edge.

• Question 188:

  You are designing a network that requires a routing protocol that will use minimal network bandwidth. Which would satisfy this requirement?

  A. RIPv2
  B. RIPng
  C. OSPF
  D. ARP
  E. EGP
  C. OSPF

• Question 189:

  Which two statements about designing the Data Center Access layer are correct? (Choose two.)

  A. Multiport NIC servers should each have their own IP address.
  B. Layer 3 connectivity should never be used in the access layer.
  C. Layer 2 connectivity is primarily implemented in the access layer.
  D. Multiport NIC servers should never be used in the access layer.
  E. Layer 2 clustering implementation requires servers to be Layer 2 adjacent.
  C. Layer 2 connectivity is primarily implemented in the access layer.
  E. Layer 2 clustering implementation requires servers to be Layer 2 adjacent.

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  User access is primarily layer 2 in nature, layer 2 clustering is possible only in layer 2 Here is the from the Cisco press CCDA certification guide Figure 4-8. Enterprise Data Center Infrastructure Overview

  

  Defining the DC Access Layer The data center access layer's main purpose is to provide Layer 2 and Layer 3 physical port density for various servers in the data center. In addition, data center access layer switches provide high-performance, low-latency switching and can support a mix of oversubscription requirements. Both Layer 2 and Layer 3 access (also called routed access) designs are available, but most data center access layers are built using Layer 2 connectivity. The Layer 2 access design uses VLAN trunks upstream, which allows data center aggregation services to be shared across the same VLAN and across multiple switches. Other advantages of Layer 2 access are support for NIC teaming and server clustering that requires network connections to be Layer 2 adjacent or on the same VLAN with one another. CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 4

• Question 190:

  Which two routing protocols converge most quickly? (Choose two.)

  A. RIPv1
  B. RIPv2
  C. BGP
  D. OSPF
  E. EIGRP
  D. OSPF
  E. EIGRP