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Q41. Which consideration is the most important for the network designer when considering IP routing?
C. on-demand routing
Q42. What technology can secure data over an insecure medium and provide WAN redundancy in the event of a primary connection failure?
A. virtual private network
B. shadow PVC
C. dial-up ISDN
D. GRE Tunnel
Q43. A company is implementing an Identity Management solution with these characteristics:
1) existing AAA Server
2) Cisco Catalyst switches
3) minimal added investments
Which Cisco Trust and Identity Management solution would you recommend?
A. NAC Appliance
B. Cisco IBNS
D. Cisco Security MARS
Q44. Which is part of the Prepare phase of PPDIOO?
A. Obtain site contact information
B. Perform network audit
C. Identify customer requirements
D. Perform gap analysis
Prepare Phase The Prepare phase establishes organization and business requirements, develops a network strategy, and proposes a high-level conceptual architecture to support the strategy. Technologies that support the architecture are identified. This phase creates a business case to establish a financial justification for a network strategy.
Q45. Which routing protocol classification should you use when full topology information is needed?
B. distance vector
D. path vector
Q46. A network engineer must implement a design where LAN clients are to connect.to various access layer devices, while remaining on the same VLAN . What type of design would support this requirement?
Q47. What submodule is found within the Enterprise Edge module?
A. enterprise WAN
B. remote branch
C. campus IPS
D. building distribution
Q48. Which two of these practices are considered to be best practices when designing the access layer for the enterprise campus? (Choose two.)
A. Implement all of the services (QoS, security, STP, and so on) in the access layer, offloading the work from the distribution and core layers.
B. Always use a Spanning Tree Protocol; preferred is Rapid PVST+.
C. Use automatic VLAN pruning to prune unused VLANs from trunked interfaces to avoid broadcast propagation.
D. Avoid wasted processing by disabling STP where loops are not possible.
E. Use VTP transparent mode to decrease the potential for operational error.
When designing the building access layer, you must consider the number of users or ports required to size up the LAN switch. Connectivity speed for each host should also be considered. Hosts might be connected using various technologies such as Fast Ethernet, Gigabit Ethernet, or port channels. The planned VLANs enter into the design.
Performance in the access layer is also important. Redundancy and QoS features should be considered.
The following are recommended best practices for the building access layer:
. Limit VLANs to a single closet when possible to provide the most deterministic and highly available topology.
. Use Rapid Per-VLAN Spanning Tree Plus (RPVST+) if STP is required. It provides the faster convergence than traditional 802.1d default timers.
. Set trunks to ON and ON with no-negotiate.
. Manually prune unused VLANs to avoid broadcast propagation (commonly done on the distribution switch).
. Use VLAN Trunking Protocol (VTP) Transparent mode, because there is little need for a common VLAN database in hierarchical networks.
. Disable trunking on host ports, because it is not necessary. Doing so provides more security and speeds up PortFast.
. Consider implementing routing in the access layer to provide fast convergence and Layer 3 load balancing.
. Use the switchport host commands on server and end-user ports to enable PortFast and disable channeling on these ports.
. Use Cisco STP Toolkit, which provides
. PortFast: Bypass listening-learning phase for access ports
. Loop GuarD. Prevents alternate or root port from becoming designated in absence of bridge protocol data units (BPDU)
. Root GuarD. Prevents external switches from becoming root
. BPDU GuarD. Disables PortFast-enabled port if a BPDU is received Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 3, Page 85
Q49. Router A has three feasible successors to the 192.168.1.0/24 network, which are listed here:
Option 1 has a metric of 8123228.
Option 2 has a metric of 2195467.
Option 3 has a metric of 8803823.
The variance 4 command was issued on Router A. How many active entries does Router A have in its routing table for the 192.168.1.0/24 network?
Q50. 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