Free Cisco 642-874 Exam Dumps Questions & Answers

Which unique characteristics of the Data Center Aggregation layer must be considered by an Enterprise Campus designer?

• A.  "East-west" server-to-server traffic can travel between aggregation modules by way of the core, but backup and replication traffic typically remains within an aggregation module.
• B.  Layer 3 routing between the Access and Aggregation layers facilitates the ability to span VLANs across multiple access switches, which is a requirement for many server virtualization and clustering technologies.
• C.  Virtualization tools allow a cost effective approach for redundancy in the network design by using two or four VDCs from the same physical switch.
• D.  Load balancing, firewall services, and other network services are commonly integrated by the use of service modules that are inserted in the aggregation switches.

Which practice is recommended when designing scalable OSPF networks?

• A.  Minimize the number of ABRs.
• B.  Minimize the number of areas supported by an ABR.
• C.  Maximize the number of routers in an area.
• D.  Maximize the number of router adjacencies.

What are two characteristics of Cisco Global Site Selector? (Choose two.)

• A.  It provides traffic rerouting in case of disaster.
• B.  HSRP, GLBP, and VRRP can be clients of GSS.
• C.  DNS responsiveness is improved by providing centralized domain management.
• D.  It helps verify end-to-end path availability.
• E.  BGP must be the routing protocol between the distributed data centers.

Which two of these correctly describe asymmetric routing and firewalls? (Choose two.)

• A.  only eight interfaces can belong to an asymmetric routing group
• B.  only operational in transparent mode
• C.  only operational in routed mode
• D.  only operational when the firewall has been configured for failover
• E.  operational in both failover and non-failover configurations

When designing the routing for an Enterprise Campus network it is important to keep which of the following route filtering aspects in mind?

• A.  IGPs (for example EIGRP or OSPF) are superior to route filtering in avoiding inappropriate transit traffic through remote nodes or inaccurate or inappropriate routing updates
• B.  The primary limitation of router filtering is that it can only be applied on outbound updates
• C.  It is best to filter (allow) the default and summary prefixes only in the Enterprise Edge to remote sites or site-to-site IPsec VPN networks
• D.  Filtering is only useful when combined with route summarization